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{"id": "CVE-2021-36947", "vendorId": null, "type": "cve", "bulletinFamily": "NVD", "title": "CVE-2021-36947", "description": "Windows Print Spooler Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-36936, CVE-2021-36958.", "published": "2021-08-12T18:15:00", "modified": "2021-08-20T18:58:00", "epss": [{"cve": "CVE-2021-36947", "epss": 0.01996, "percentile": 0.87114, "modified": "2023-05-23"}], "cvss": {"score": 6.5, "vector": "AV:N/AC:L/Au:S/C:P/I:P/A:P"}, "cvss2": {"cvssV2": {"version": "2.0", "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P", "accessVector": "NETWORK", "accessComplexity": "LOW", "authentication": "SINGLE", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "baseScore": 6.5}, "severity": "MEDIUM", "exploitabilityScore": 8.0, "impactScore": 6.4, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "cvss3": 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Vulnerability This CVE ID is unique from CVE-2021-36936, CVE-2021-36958.", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "baseScore": 8.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2021-08-12T18:15:00", "type": "prion", "title": "CVE-2021-36947", "bulletinFamily": "NVD", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 6.5, "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "SINGLE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-36936", "CVE-2021-36947", "CVE-2021-36958"], "modified": "2021-08-20T18:58:00", "id": "PRION:CVE-2021-36947", "href": "https://kb.prio-n.com/vulnerability/CVE-2021-36947", "cvss": {"score": 6.5, "vector": "AV:N/AC:L/Au:S/C:P/I:P/A:P"}}, {"lastseen": "2023-08-16T06:34:21", "description": "Windows Print Spooler Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-36936, CVE-2021-36947.", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 5.9}, "published": "2021-08-12T18:15:00", "type": "prion", "title": "CVE-2021-36958", "bulletinFamily": "NVD", "cvss2": {"severity": "HIGH", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 9.3, "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-36936", "CVE-2021-36947", "CVE-2021-36958"], "modified": "2021-08-24T15:32:00", "id": "PRION:CVE-2021-36958", "href": "https://kb.prio-n.com/vulnerability/CVE-2021-36958", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2023-08-16T06:34:08", "description": "Windows Print Spooler Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-36947, CVE-2021-36958.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2021-08-12T18:15:00", "type": "prion", "title": "CVE-2021-36936", "bulletinFamily": "NVD", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-36936", "CVE-2021-36947", "CVE-2021-36958"], "modified": "2021-08-20T19:04:00", "id": "PRION:CVE-2021-36936", "href": "https://kb.prio-n.com/vulnerability/CVE-2021-36936", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "mscve": [{"lastseen": "2023-06-14T15:25:15", "description": "Windows Print Spooler Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-36947, CVE-2021-36958.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2021-08-10T07:00:00", "type": "mscve", "title": "Windows Print Spooler Remote Code Execution Vulnerability", "bulletinFamily": "microsoft", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-36936", "CVE-2021-36947", "CVE-2021-36958"], "modified": "2021-08-10T07:00:00", "id": "MS:CVE-2021-36936", "href": "https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-36936", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-06-14T15:25:14", "description": "Windows Print Spooler Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-36936, CVE-2021-36958.", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "baseScore": 8.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2021-08-10T07:00:00", "type": "mscve", "title": "Windows Print Spooler Remote Code Execution Vulnerability", "bulletinFamily": "microsoft", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 6.5, "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "SINGLE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-36936", "CVE-2021-36947", "CVE-2021-36958"], "modified": "2021-08-10T07:00:00", "id": "MS:CVE-2021-36947", "href": "https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-36947", "cvss": {"score": 6.5, "vector": "AV:N/AC:L/Au:S/C:P/I:P/A:P"}}, {"lastseen": "2023-06-14T15:25:11", "description": "A remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.\n", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 5.9}, "published": "2021-08-11T07:00:00", "type": "mscve", "title": "Windows Print Spooler Remote Code Execution Vulnerability", "bulletinFamily": "microsoft", "cvss2": {"severity": "HIGH", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 9.3, "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-36958"], "modified": "2021-09-14T07:00:00", "id": "MS:CVE-2021-36958", "href": "https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-36958", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}], "thn": [{"lastseen": "2022-05-09T12:39:14", "description": "[](<https://thehackernews.com/images/-YB6xMmNkBp0/YRYuIvxMidI/AAAAAAAADhg/a2Ee5QkoQZw6JlnYhCIdg3Nk-HM2yu2wwCLcBGAsYHQ/s0/ransomware.jpg>)\n\nRansomware operators such as Magniber and Vice Society are actively exploiting vulnerabilities in Windows Print Spooler to compromise victims and spread laterally across a victim's network to deploy file-encrypting payloads on targeted systems.\n\n\"Multiple, distinct threat actors view this vulnerability as attractive to use during their attacks and may indicate that this vulnerability will continue to see more widespread adoption and incorporation by various adversaries moving forward,\" Cisco Talos [said](<https://blog.talosintelligence.com/2021/08/vice-society-ransomware-printnightmare.html>) in a report published Thursday, corroborating an [independent analysis](<https://www.crowdstrike.com/blog/magniber-ransomware-caught-using-printnightmare-vulnerability/>) from CrowdStrike, which observed instances of Magniber ransomware infections targeting entities in South Korea.\n\nWhile Magniber ransomware was first spotted in late 2017 singling out victims in South Korea through malvertising campaigns, Vice Society is a new entrant that emerged on the ransomware landscape in mid-2021, primarily targeting public school districts and other educational institutions. The attacks are said to have taken place since at least July 13.\n\nSince June, a series of \"PrintNightmare\" issues affecting the Windows print spooler service has come to light that could enable remote code execution when the component performs privileged file operations -\n\n * [**CVE-2021-1675**](<https://thehackernews.com/2021/06/researchers-leak-poc-exploit-for.html>) \\- Windows Print Spooler Remote Code Execution Vulnerability (Patched on June 8)\n * [**CVE-2021-34527**](<https://thehackernews.com/2021/07/microsofts-emergency-patch-fails-to.html>) \\- Windows Print Spooler Remote Code Execution Vulnerability (Patched on July 6-7)\n * [**CVE-2021-34481**](<https://thehackernews.com/2021/07/microsoft-warns-of-new-unpatched.html>) \\- Windows Print Spooler Remote Code Execution Vulnerability (Patched on August 10)\n * [**CVE-2021-36936**](<https://thehackernews.com/2021/08/microsoft-releases-windows-updates-to.html>) \\- Windows Print Spooler Remote Code Execution Vulnerability (Patched on August 10) \n * [**CVE-2021-36947**](<https://thehackernews.com/2021/08/microsoft-releases-windows-updates-to.html>) \\- Windows Print Spooler Remote Code Execution Vulnerability (Patched on August 10)\n * [**CVE-2021-34483**](<https://thehackernews.com/2021/08/microsoft-releases-windows-updates-to.html>) \\- Windows Print Spooler Elevation of Privilege Vulnerability (Patched on August 10)\n * [**CVE-2021-36958**](<https://thehackernews.com/2021/08/microsoft-security-bulletin-warns-of.html>) \\- Windows Print Spooler Remote Code Execution Vulnerability (Unpatched)\n\nCrowdStrike noted it was able to successfully prevent attempts made by the Magniber ransomware gang at exploiting the PrintNightmare vulnerability.\n\nVice Society, on the other hand, leveraged a variety of techniques to conduct post-compromise discovery and reconnaissance prior to bypassing native Windows protections for credential theft and privilege escalation.\n\n[](<https://thehackernews.com/images/-JlsTWIHVgX4/YRYltMOGBKI/AAAAAAAADhQ/pzUFIcW6y0ABjOe3PuUQE5cPSnEOvGP9ACLcBGAsYHQ/s0/ransomware.jpg>)\n\nSpecifically, the attacker is believed to have used a malicious library associated with the PrintNightmare flaw (CVE-2021-34527) to pivot to multiple systems across the environment and extract credentials from the victim.\n\n\"Adversaries are constantly refining their approach to the ransomware attack lifecycle as they strive to operate more effectively, efficiently, and evasively,\" the researchers said. \"The use of the vulnerability known as PrintNightmare shows that adversaries are paying close attention and will quickly incorporate new tools that they find useful for various purposes during their attacks.\"\n\n \n\n\nFound this article interesting? Follow THN on [Facebook](<https://www.facebook.com/thehackernews>), [Twitter _\uf099_](<https://twitter.com/thehackersnews>) and [LinkedIn](<https://www.linkedin.com/company/thehackernews/>) to read more exclusive content we post.\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2021-08-13T08:29:00", "type": "thn", "title": "Ransomware Gangs Exploiting Windows Print Spooler Vulnerabilities", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 9.3, "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-1675", "CVE-2021-34481", "CVE-2021-34483", "CVE-2021-34527", "CVE-2021-36936", "CVE-2021-36947", "CVE-2021-36958"], "modified": "2021-08-13T08:32:51", "id": "THN:6428957E9DED493169A2E63839F98667", "href": "https://thehackernews.com/2021/08/ransomware-gangs-exploiting-windows.html", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2022-05-09T12:39:15", "description": "[](<https://thehackernews.com/images/-KFVbzvrTdtw/YRNbSwawxnI/AAAAAAAADfg/bEuoCVHmHHw4ycTXfnhAqcyuUoWDf2W7gCLcBGAsYHQ/s0/windows-update-download.jpg>)\n\nMicrosoft on Tuesday rolled out [security updates](<https://msrc.microsoft.com/update-guide/releaseNote/2021-Aug>) to address a total of 44 security issues affecting its software products and services, one of which it says is an actively exploited zero-day in the wild.\n\nThe update, which is the smallest release since December 2019, squashes seven Critical and 37 Important bugs in Windows, .NET Core &amp; Visual Studio, Azure, Microsoft Graphics Component, Microsoft Office, Microsoft Scripting Engine, Microsoft Windows Codecs Library, Remote Desktop Client, among others. This is in addition to [seven security flaws](<https://docs.microsoft.com/en-us/deployedge/microsoft-edge-relnotes-security>) it patched in the Microsoft Edge browser on August 5.\n\nChief among the patched issues is [CVE-2021-36948](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36948>) (CVSS score: 7.8), an elevation of privilege flaw affecting Windows Update Medic Service \u2014 a service that enables remediation and protection of Windows Update components \u2014 which could be abused to run malicious programs with escalated permissions.\n\nMicrosoft's Threat Intelligence Center has been credited with reporting the flaw, although the company refrained from sharing additional specifics or detail on how widespread those attacks were in light of active exploitation attempts.\n\nTwo of the security vulnerabilities are publicly known at the time of release -\n\n * [CVE-2021-36942](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36942>) (CVSS score: 9.8) - Windows LSA Spoofing Vulnerability\n * [CVE-2021-36936](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36936>) (CVSS score: 8.8) - Windows Print Spooler Remote Code Execution Vulnerability\n\nWhile CVE-2021-36942 contains fixes to secure systems against NTLM relay attacks like [PetitPotam](<https://thehackernews.com/2021/07/new-petitpotam-ntlm-relay-attack-lets.html>) by blocking the LSARPC interface, CVE-2021-36936 resolves yet another remote code execution flaw in the Windows Print Spooler component.\n\n\"An unauthenticated attacker could call a method on the LSARPC interface and coerce the domain controller to authenticate against another server using NTLM,\" Microsoft said in its advisory for CVE-2021-36942; adding the \"security update blocks the affected API calls OpenEncryptedFileRawA and OpenEncryptedFileRawW through LSARPC interface.\"\n\nCVE-2021-36936 is also one among the three flaws in the Print Spooler service that Microsoft has fixed this month, with the two other vulnerabilities being [CVE-2021-36947](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36947>) and (CVSS score: 8.2) and [CVE-2021-34483](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34483>) (CVSS score: 7.8), the latter of which concerns an elevation of privilege vulnerability.\n\nIn addition, Microsoft has released [security updates](<https://support.microsoft.com/en-us/topic/kb5005652-manage-new-point-and-print-default-driver-installation-behavior-cve-2021-34481-873642bf-2634-49c5-a23b-6d8e9a302872>) to resolve a previously disclosed remote code execution in the Print Spooler service tracked as [CVE-2021-34481](<https://thehackernews.com/2021/07/microsoft-warns-of-new-unpatched.html>) (CVSS score: 8.8). This changes the default behavior of the \"[Point and Print](<https://docs.microsoft.com/en-us/windows-hardware/drivers/print/introduction-to-point-and-print>)\" feature, effectively preventing non-administrator users from installing or updating new and existing printer drivers using drivers from a remote computer or server without first elevating themselves to an administrator.\n\nAnother critical flaw remediated as part of Patch Tuesday updates is [CVE-2021-26424](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26424>) (CVSS score: 9.9), a remote code execution vulnerability in Windows TCP/IP, which Microsoft notes \"is remotely triggerable by a malicious Hyper-V guest sending an ipv6 ping to the Hyper-V host. An attacker could send a specially crafted TCP/IP packet to its host utilizing the TCP/IP Protocol Stack (tcpip.sys) to process packets.\"\n\nTo install the latest security updates, Windows users can head to Start &gt; Settings &gt; Update &amp; Security &gt; Windows Update or by selecting Check for Windows updates.\n\n### Software Patches From Other Vendors\n\nBesides Microsoft, patches have also been released by a number of other vendors to address several vulnerabilities, including -\n\n * [Adobe](<https://helpx.adobe.com/security.html/security/security-bulletin.ug.html>)\n * [Android](<https://source.android.com/security/bulletin/2021-08-01>)\n * [Cisco](<https://tools.cisco.com/security/center/publicationListing.x>)\n * [Citrix](<https://support.citrix.com/search/#/All%20Products?ct=Software%20Updates,Security%20Bulletins&searchText=&sortBy=Modified%20date&pageIndex=1>)\n * [Juniper Networks](<https://kb.juniper.net/InfoCenter/index?page=content&channel=SECURITY_ADVISORIES>)\n * Linux distributions [SUSE](<https://lists.suse.com/pipermail/sle-security-updates/2021-August/thread.html>), [Oracle Linux](<https://linux.oracle.com/ords/f?p=105:21>), and [Red Hat](<https://access.redhat.com/security/security-updates/#/security-advisories?q=&p=2&sort=portal_publication_date%20desc&rows=10&portal_advisory_type=Security%20Advisory&documentKind=Errata>)\n * [SAP](<https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=582222806>)\n * [Schneider Electric](<https://www.se.com/ww/en/work/support/cybersecurity/overview.jsp>)\n * [Siemens](<https://new.siemens.com/global/en/products/services/cert.html#SecurityPublications>), and\n * [VMware](<https://www.vmware.com/security/advisories.html>)\n \n\n\nFound this article interesting? Follow THN on [Facebook](<https://www.facebook.com/thehackernews>), [Twitter _\uf099_](<https://twitter.com/thehackersnews>) and [LinkedIn](<https://www.linkedin.com/company/thehackernews/>) to read more exclusive content we post.\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2021-08-11T05:31:00", "type": "thn", "title": "Microsoft Releases Windows Updates to Patch Actively Exploited Vulnerability", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-26424", "CVE-2021-34481", "CVE-2021-34483", "CVE-2021-36936", "CVE-2021-36942", "CVE-2021-36947", "CVE-2021-36948"], "modified": "2021-08-11T05:31:39", "id": "THN:F601EBBE359B3547B8E79F0217562FEF", "href": "https://thehackernews.com/2021/08/microsoft-releases-windows-updates-to.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2022-05-09T12:39:14", "description": "[](<https://thehackernews.com/images/-otyRXbM_lrE/YRSmPS71hoI/AAAAAAAADgQ/tTqtA8hUI7kXtRqLCssO2jaV1gRO-zUdACLcBGAsYHQ/s0/printer-hack.gif>)\n\nA day after releasing [Patch Tuesday updates](<https://thehackernews.com/2021/08/microsoft-releases-windows-updates-to.html>), Microsoft acknowledged yet another remote code execution vulnerability in the Windows Print Spooler component, adding that it's working to remediate the issue in an upcoming security update.\n\nTracked as [CVE-2021-36958](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36958>) (CVSS score: 7.3), the unpatched flaw is the latest to join a [list](<https://thehackernews.com/2021/07/microsoft-warns-of-new-unpatched.html>) of [bugs](<https://thehackernews.com/2021/07/researcher-uncover-yet-another.html>) collectively known as [PrintNightmare](<https://www.cnet.com/news/2021/08/microsoft-releases-windows-updates-to.html%20https://suppor>) that have plagued the printer service and come to light in recent months. Victor Mata of FusionX, Accenture Security, who has been credited with reporting the flaw, [said](<https://twitter.com/offenseindepth/status/1425574625384206339>) the issue was disclosed to Microsoft in December 2020.\n\n\"A remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations,\" the company said in its out-of-band bulletin, echoing the vulnerability details for [CVE-2021-34481](<https://thehackernews.com/2021/07/microsoft-warns-of-new-unpatched.html>). \"An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.\"\n\n[](<https://thehackernews.com/images/-2GxRoKJtyWA/YRSwMjr9x2I/AAAAAAAADgY/_N1Bo0X9GrsWaOMamfoYSHTTfcM5ZJYbwCLcBGAsYHQ/s0/PRINTER.jpg>)\n\nIt's worth noting that the Windows maker has since released [updates](<https://support.microsoft.com/en-us/topic/kb5005652-manage-new-point-and-print-default-driver-installation-behavior-cve-2021-34481-873642bf-2634-49c5-a23b-6d8e9a302872>) to change the default Point and Print default behavior, effectively barring non-administrator users from installing or updating new and existing printer drivers using drivers from a remote computer or server without first elevating themselves to an administrator.\n\nAs workarounds, Microsoft is recommending users to stop and disable the Print Spooler service to prevent malicious actors from exploiting the vulnerability. The CERT Coordination Center, in a [vulnerability note](<https://www.kb.cert.org/vuls/id/131152>), is also advising users to block outbound SMB traffic to prevent connecting to a malicious shared printer.\n\n \n\n\nFound this article interesting? Follow THN on [Facebook](<https://www.facebook.com/thehackernews>), [Twitter _\uf099_](<https://twitter.com/thehackersnews>) and [LinkedIn](<https://www.linkedin.com/company/thehackernews/>) to read more exclusive content we post.\n", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2021-08-12T05:23:00", "type": "thn", "title": "Microsoft Warns of Another Unpatched Windows Print Spooler RCE Vulnerability", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 9.3, "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-34481", "CVE-2021-36958"], "modified": "2021-08-12T06:19:03", "id": "THN:3F83D0C001F2A9046C61A56F5ABE7695", "href": "https://thehackernews.com/2021/08/microsoft-security-bulletin-warns-of.html", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2022-05-09T12:38:05", "description": "[](<https://thehackernews.com/new-images/img/a/AVvXsEguJG5dD1Vh67fJlg0O-HXucpsF2Y-eVW6kua8F3Er_7OwG5WZpZAqvZHKbXJboPvuTyfrTXpc260OZ87-4ehJm-_qY8JOnLJxhWok-es74ZTW3O7ua3WuueglfYtH7632jDmh5DfPftDD998FED2xruJFMtTPwe_eI7umOKXrdazu4WRTC-OnHg7ND>)\n\nThe clearnet and dark web payment portals operated by the [Conti](<https://thehackernews.com/2021/05/fbi-warns-conti-ransomware-hit-16-us.html>) ransomware group have gone down in what appears to be an attempt to shift to new infrastructure after details about the gang's inner workings and its members were made public.\n\nAccording to [MalwareHunterTeam](<https://twitter.com/malwrhunterteam/status/1461450607311605766>), \"while both the clearweb and Tor domains of the leak site of the Conti ransomware gang is online and working, both their clearweb and Tor domains for the payment site (which is obviously more important than the leak) is down.\"\n\nIt's not clear what prompted the shutdown, but the development comes as Swiss cybersecurity firm PRODAFT [offered](<https://www.prodaft.com/resource/detail/conti-ransomware-group-depth-analysis>) an unprecedented look into the group's ransomware-as-a-service (RaaS) model, wherein the developers sell or lease their ransomware technology to affiliates hired from darknet forums, who then carry out attacks on their behalf while also netting about 70% of each ransom payment extorted from the victims.\n\nThe result? Three members of the Conti team have been identified so far, each playing the roles of admin (\"Tokyo\"), assistant (\"it_work_support@xmpp[.]jp\"), and recruiter (\"IT_Work\") to attract new affiliates into their network.\n\nWhile ransomware attacks work by encrypting the victims' sensitive information and rendering it inaccessible, threat actors have increasingly latched on to a two-pronged strategy called double extortion to demand a ransom payment for decrypting the data and threaten to publicly publish the stolen information if the payment is not received within a specific deadline.\n\n[](<https://thehackernews.com/new-images/img/a/AVvXsEgOlxdMar0Fk9C_1oq4rsZqCsRuaWDFa_UwPznj1p4XnxV22g7c-3gidrF7ZVnxd0TVDTn8qhzr16V265fVSa3d-p7SOODkUMikIREYKzV6MyCaPI1KWzNgYj3TduhqzgszRUX6zZkCytED5c4K-icaEZjwN4cvwnz1D0zehnwVGdYAwJXLo8uaJijX>)\n\n\"Conti customers \u2013 affiliate threat actors \u2013 use [a digital] management panel to create new ransomware samples, manage their victims, and collect data on their attacks,\" noted the researchers, detailing the syndicate's attack kill chain leveraging PrintNightmare ([CVE-2021-1675](<https://thehackernews.com/2021/06/researchers-leak-poc-exploit-for.html>), [CVE-2021-34527](<https://thehackernews.com/2021/07/microsoft-warns-of-critical.html>), and [CVE-2021-36958](<https://thehackernews.com/2021/08/microsoft-security-bulletin-warns-of.html>)) and FortiGate ([CVE-2018-13374](<https://nvd.nist.gov/vuln/detail/CVE-2018-13374>) and [CVE-2018-13379](<https://thehackernews.com/2021/09/hackers-leak-vpn-account-passwords-from.html>)) vulnerabilities to compromise unpatched systems.\n\n[](<https://thehackernews.com/new-images/img/a/AVvXsEh5pQ7nISIe-f2lC7T7iJVkfmQ4L9uCXsO1rxdPo0YzkwJ4-Q15UkgDuRGhckTpdbAYrR1h3kYePBPrRNFWefg6MtaX_jlMsgcojwvu-zrrtvaw0hKxGJkD-dTl06UiZOX1R5kuboLkxyuot8hDBrgxX1fH8yoVdsv0e1f0rvziG6_Mw-IWMJUBBgQg>)\n\nEmerging on the cybercrime landscape in October 2019, Conti is believed to be the work of a Russia-based threat group called [Wizard Spider](<https://malpedia.caad.fkie.fraunhofer.de/actor/wizard_spider>), which is also the operator of the infamous [TrickBot](<https://thehackernews.com/2021/11/trickbot-operators-partner-with-shatak.html>) banking malware. Since then, at least 567 different companies have had their business-critical data exposed on the victim shaming site, with the ransomware cartel receiving over 500 bitcoin ($25.5 million) in payments since July 2021.\n\nWhat's more, an analysis of ransomware samples and the bitcoin wallet addresses utilized for receiving the payments has revealed a connection between Conti and Ryuk, with both families heavily banking on TrickBot, Emotet, and BazarLoader for actually [delivering the file-encrypting payloads](<https://thehackernews.com/2021/06/ransomware-attackers-partnering-with.html>) onto victim's networks via email phishing and other social engineering schemes.\n\n[](<https://thehackernews.com/new-images/img/a/AVvXsEgySne4_su9eRCap6MABBaa8kbBo2rWbr8gzBUOmkmLhbonXU-etPl5K4VuXHkduN2lH7fMHbQ7q8Wq0HsqBnUz9P3JWJBqtztJQAEPOJWnoAVuecd8Zyblq-TOPPfmILc40tmzfs9VX0h_utrR3fydA8JQm8EO0PO7BIKlRaSIBA8_I717s_bvckQ5>)\n\nPRODAFT said it was also able to gain access to the group's recovery service and an admin management panel hosted as a Tor hidden service on an Onion domain, revealing extensive details of a clearnet website called \"contirecovery[.]ws\" that contains instructions for purchasing decryption keys from the affiliates. Interestingly, an investigation into Conti's ransomware negotiation process [published](<https://team-cymru.com/blog/2021/10/05/collaborative-research-on-the-conti-ransomware-group/>) by Team Cymru last month highlighted a similar open web URL named \"contirecovery[.]info.\"\n\n\"In order to tackle the complex challenge of disrupting cybercriminal organizations, public and private forces need to work collaboratively with one another to better understand and mitigate the wider legal and commercial impact of the threat,\" the researchers said.\n\n**_Update:_** The Conti ransomware's payment [portals](<https://twitter.com/VK_Intel/status/1461810216241086467>) are back up and running, more than 24 hours after they were first taken down in response to a report that identified the real IP address of one of its recovery (aka payment) servers \u2014 217.12.204[.]135 \u2014 thereby effectively bolstering its security measures.\n\n\"Looks like Europeans have also decided to abandon their manners and go full-gansta simply trying to break our systems,\"the gang said in a statement posted on their blog, effectively confirming PRODAFT's findings, but characterizing the details as \"simply disinformation,\" and that \"the reported 25kk which we 'made since July' is straight-up BS - we've made around 300kk at least.\"\n\n \n\n\nFound this article interesting? Follow THN on [Facebook](<https://www.facebook.com/thehackernews>), [Twitter _\uf099_](<https://twitter.com/thehackersnews>) and [LinkedIn](<https://www.linkedin.com/company/thehackernews/>) to read more exclusive content we post.\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2021-11-19T06:50:00", "type": "thn", "title": "Experts Expose Secrets of Conti Ransomware Group That Made 25 Million from Victims", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 9.3, "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2018-13374", "CVE-2018-13379", "CVE-2021-1675", "CVE-2021-34527", "CVE-2021-36958"], "modified": "2021-11-20T15:13:21", "id": "THN:F35E41E26872B23A7F620C6D8F7E2334", "href": "https://thehackernews.com/2021/11/experts-expose-secrets-of-conti.html", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}], "avleonov": [{"lastseen": "2021-11-26T18:43:30", "description": "Hello everyone! Yet another news episode.\n\n## Microsoft&#x27;s August Patch Tuesday\n\nLet&#x27;s start with Microsoft&#x27;s August Patch Tuesday. I think the most interesting thing is that it contains a fix for the PetitPotam vulnerability. I talked about this vulnerability two weeks ago. At the time, Microsoft had no plans to release a patch because PetitPotam was a &quot;classic NTLM Relay Attack&quot;. But the patch was actually released as part of August Patch Tuesday.\n\nA [quote from Rapid7](<https://www.rapid7.com/blog/post/2021/08/03/petitpotam-novel-attack-chain-can-fully-compromise-windows-domains-running-ad-cs/>): _&quot;Tracked as CVE-2021-36942, the August 2021 Patch Tuesday security update blocks the affected API calls OpenEncryptedFileRawA and OpenEncryptedFileRawW through the LSARPC interface&quot;_. \n\nThere are no formal signs that this vulnerability is critical other than comments from the vendors. My Vulristics tool has flagged this &quot;Windows LSA Spoofing&quot; as a Medium level Vulnerability. But this fix seems to be the most important thing in this Patch Tuesday. So install this patch first.\n\nSpeaking of other vulnerabilities. There was nothing critical. No vulnerabilities with public exploits. Only one vulnerability that has been exploited in the wild, CVE-2021-36948 \u2013 Windows Update Medic Service Elevation of Privilege. But this is EoP and there are no public exploits yet, so I think you can patch it as planned without hurry.\n\nSeveral potentially dangerous RCEs:\n\n * Windows Print Spooler (CVE-2021-36936, CVE-2021-36947). They look similar to PrintNightmare, but there are no details yet.\n * Windows TCP/IP (CVE-2021-26424) and Remote Desktop Client (CVE-2021-34535). Such vulnerabilities rarely get public exploits.\n * NFS ONCRPC XDR Driver (CVE-2021-26432). Nothing is clear at all.\n\nIn general, it looks like a ptetty calm Patch Tuesday. If you&#x27;re interested, a link to the Vulristics report: In general, it looks like a ptetty calm Patch Tuesday. If you&#x27;re interested, a link to the Vulristics report: [ms_patch_tuesday_august2021](<https://avleonov.com/vulristics_reports/ms_patch_tuesday_august2021_report_avleonov_comments.html>)\n\n## Phishers started using reCAPTCHA\n\nFunny news that I really liked. [Phishers started using reCAPTCHA](<https://threatpost.com/cyberattackers-captchas-phishing-malware/168684/>) to bypass the automatic detection of phishing sites. The script only sees the safe page with a CAPTCHA and can&#x27;t solve it. But a real person just solves it without thinking, because people used to seeing and solving such CAPTCHAs, and see the complete phishing site. It&#x27;s very simple and ingenious! \n\n## Scan one IP and go to the prison\n\nAnd the last will be [a local news from Russia](<https://www.rbc.ru/technology_and_media/17/08/2021/611a95059a7947e9bf954a8f>). But the case is interesting. One guy worked in the tech support of some internet provider. And he decided to scan the network of this provider, detect misconfigured routers of the clients and inform them about the found vulnerabilities. His boss knew about it. Unfortunatelly, these clients included some government scientific research-to-production facility with a mail server available on the scanned IP. This facility is a \u201ccritical infrastructure\u201d object and the actions of a support technician are classified as an attack on critical infrastructure. He can spend up to 7 years in prison. Why he personally and not his employer? That guy worked remotelly from home and scanned from his personal IP address.\n\nA pretty crazy story, but it shows the cirumstances of &quot;penetration testing&quot; or &quot;bughunting&quot; without getting all necessery formal permissions. It also shows how, in theory, a person could be easily framed as an attacker if that person&#x27;s personal device is compromised. Also, I don&#x27;t think port scanning or banner grabbing is actually an attack, IMHO this is normal network activity. And I don&#x27;t think that checking the default passwords is always an attack, but it is a topic for discussion. In fact it doesn&#x27;t matter what I or we think, it&#x27;s only law enforcement practice that matters, and that practice can be pretty harsh. So keep that in mind and don&#x27;t scan the unknown hosts that don&#x27;t belong to you unless you want sudden problems.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 9.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 5.9}, "published": "2021-08-19T21:38:46", "type": "avleonov", "title": "Security News: Microsoft Patch Tuesday August 2021, Phishers Started Using reCAPTCHA, Scan 1 IP and Go to Jail", "bulletinFamily": "blog", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-26424", "CVE-2021-26432", "CVE-2021-34535", "CVE-2021-36936", "CVE-2021-36942", "CVE-2021-36947", "CVE-2021-36948"], "modified": "2021-08-19T21:38:46", "id": "AVLEONOV:3530747E605445686B7211B2B0853579", "href": "https://avleonov.com/2021/08/20/security-news-microsoft-patch-tuesday-august-2021-phishers-started-using-recaptcha-scan-1-ip-and-go-to-jail/", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "kaspersky": [{"lastseen": "2023-05-23T16:30:42", "description": "### *Detect date*:\n08/11/2021\n\n### *Severity*:\nWarning\n\n### *Description*:\nA remote code execution vulnerability was found in Microsoft Products (Extended Security Update). Malicious users can exploit this vulnerability to execute arbitrary code.\n\n### *Affected products*:\nWindows Print Spooler\n\n### *Solution*:\nInstall necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)\n\n### *Original advisories*:\n[CVE-2021-36958](<https://nvd.nist.gov/vuln/detail/CVE-2021-36958>) \n\n\n### *Impacts*:\nACE \n\n### *Related products*:\n[Windows Print Spooler](<https://threats.kaspersky.com/en/product/Windows-Print-Spooler/>)\n\n### *KB list*:\n[5005633](<http://support.microsoft.com/kb/5005633>) \n[5005606](<http://support.microsoft.com/kb/5005606>) \n[5005615](<http://support.microsoft.com/kb/5005615>) \n[5005618](<http://support.microsoft.com/kb/5005618>)\n\n### *Microsoft official advisories*:", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 5.9}, "published": "2021-08-11T00:00:00", "type": "kaspersky", "title": "KLA12282 RCE vulnerability in Microsoft Products (ESU)", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 9.3, "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-36958"], "modified": "2021-09-24T00:00:00", "id": "KLA12282", "href": "https://threats.kaspersky.com/en/vulnerability/KLA12282/", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2023-05-23T16:30:43", "description": "### *Detect date*:\n08/11/2021\n\n### *Severity*:\nWarning\n\n### *Description*:\nA remote code execution vulnerability was found in Microsoft Windows. Malicious users can exploit this vulnerability to execute arbitrary code.\n\n### *Affected products*:\nWindows Print Spooler\n\n### *Solution*:\nInstall necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)\n\n### *Original advisories*:\n[CVE-2021-36958](<https://nvd.nist.gov/vuln/detail/CVE-2021-36958>) \n\n\n### *Impacts*:\nACE \n\n### *KB list*:\n[5005613](<http://support.microsoft.com/kb/5005613>) \n[5005568](<http://support.microsoft.com/kb/5005568>) \n[5005627](<http://support.microsoft.com/kb/5005627>) \n[5005565](<http://support.microsoft.com/kb/5005565>) \n[5005623](<http://support.microsoft.com/kb/5005623>) \n[5005573](<http://support.microsoft.com/kb/5005573>) \n[5005569](<http://support.microsoft.com/kb/5005569>) \n[5005566](<http://support.microsoft.com/kb/5005566>) \n[5005607](<http://support.microsoft.com/kb/5005607>)", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 5.9}, "published": "2021-08-11T00:00:00", "type": "kaspersky", "title": "KLA12281 RCE vulnerability in Microsoft Windows", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 9.3, "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-36958"], "modified": "2021-09-23T00:00:00", "id": "KLA12281", "href": "https://threats.kaspersky.com/en/vulnerability/KLA12281/", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2023-05-27T14:58:15", "description": "### *Detect date*:\n08/10/2021\n\n### *Severity*:\nCritical\n\n### *Description*:\nMultiple vulnerabilities were found in Microsoft Products (Extended Security Update). Malicious users can exploit these vulnerabilities to execute arbitrary code, gain privileges, spoof user interface, cause denial of service.\n\n### *Exploitation*:\nMalware exists for this vulnerability. Usually such malware is classified as Exploit. [More details](<https://threats.kaspersky.com/en/class/Exploit/>).\n\n### *Affected products*:\nWindows 10 Version 1607 for 32-bit Systems \nWindows 10 Version 20H2 for x64-based Systems \nWindows Server 2008 R2 for x64-based Systems Service Pack 1 \nWindows Server 2008 for 32-bit Systems Service Pack 2 \nWindows 8.1 for 32-bit systems \nWindows Server 2016 (Server Core installation) \nWindows 10 Version 1909 for ARM64-based Systems \nWindows Server 2019 (Server Core installation) \nWindows 10 Version 1809 for 32-bit Systems \nWindows 10 for x64-based Systems \nWindows Server 2012 (Server Core installation) \nWindows 7 for 32-bit Systems Service Pack 1 \nWindows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) \nWindows 10 Version 2004 for ARM64-based Systems \nWindows 10 Version 1909 for 32-bit Systems \nWindows Server 2019 \nWindows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) \nWindows 10 Version 1607 for x64-based Systems \nWindows Server 2008 for x64-based Systems Service Pack 2 \nWindows 10 Version 1809 for x64-based Systems \nWindows 10 for 32-bit Systems \nWindows 10 Version 20H2 for 32-bit Systems \nWindows Server, version 20H2 (Server Core Installation) \nWindows Server 2012 R2 \nWindows 10 Version 2004 for x64-based Systems \nWindows 10 Version 21H1 for 32-bit Systems \nWindows Server 2016 \nWindows RT 8.1 \nWindows 10 Version 21H1 for ARM64-based Systems \nWindows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) \nWindows 10 Version 20H2 for ARM64-based Systems \nWindows Server 2012 \nWindows 8.1 for x64-based systems \nRemote Desktop client for Windows Desktop \nWindows 7 for x64-based Systems Service Pack 1 \nWindows 10 Version 1909 for x64-based Systems \nWindows 10 Version 2004 for 32-bit Systems \nWindows 10 Version 1809 for ARM64-based Systems \nWindows 10 Version 21H1 for x64-based Systems \nWindows Server 2012 R2 (Server Core installation) \nWindows Server, version 2004 (Server Core installation)\n\n### *Solution*:\nInstall necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)\n\n### *Original advisories*:\n[CVE-2021-34533](<https://nvd.nist.gov/vuln/detail/CVE-2021-34533>) \n[CVE-2021-26424](<https://nvd.nist.gov/vuln/detail/CVE-2021-26424>) \n[CVE-2021-34537](<https://nvd.nist.gov/vuln/detail/CVE-2021-34537>) \n[CVE-2021-26425](<https://nvd.nist.gov/vuln/detail/CVE-2021-26425>) \n[CVE-2021-36936](<https://nvd.nist.gov/vuln/detail/CVE-2021-36936>) \n[CVE-2021-34483](<https://nvd.nist.gov/vuln/detail/CVE-2021-34483>) \n[CVE-2021-36937](<https://nvd.nist.gov/vuln/detail/CVE-2021-36937>) \n[CVE-2021-36942](<https://nvd.nist.gov/vuln/detail/CVE-2021-36942>) \n[CVE-2021-36947](<https://nvd.nist.gov/vuln/detail/CVE-2021-36947>) \n[CVE-2021-34484](<https://nvd.nist.gov/vuln/detail/CVE-2021-34484>) \n[CVE-2021-34535](<https://nvd.nist.gov/vuln/detail/CVE-2021-34535>) \n[CVE-2021-36927](<https://nvd.nist.gov/vuln/detail/CVE-2021-36927>) \n[CVE-2021-34480](<https://nvd.nist.gov/vuln/detail/CVE-2021-34480>) \n\n\n### *Impacts*:\nACE \n\n### *Related products*:\n[Microsoft Windows](<https://threats.kaspersky.com/en/product/Microsoft-Windows/>)\n\n### *KB list*:\n[5005090](<http://support.microsoft.com/kb/5005090>) \n[5005089](<http://support.microsoft.com/kb/5005089>) \n[5005036](<http://support.microsoft.com/kb/5005036>) \n[5005095](<http://support.microsoft.com/kb/5005095>) \n[5005088](<http://support.microsoft.com/kb/5005088>) \n[5011525](<http://support.microsoft.com/kb/5011525>) \n[5011534](<http://support.microsoft.com/kb/5011534>) \n[5011552](<http://support.microsoft.com/kb/5011552>) \n[5011529](<http://support.microsoft.com/kb/5011529>)\n\n### *Microsoft official advisories*:", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2021-08-10T00:00:00", "type": "kaspersky", "title": "KLA12250 Multiple vulnerabilities in Microsoft Products (ESU)", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-26424", "CVE-2021-26425", "CVE-2021-34480", "CVE-2021-34483", "CVE-2021-34484", "CVE-2021-34533", "CVE-2021-34535", "CVE-2021-34537", "CVE-2021-36927", "CVE-2021-36936", "CVE-2021-36937", "CVE-2021-36942", "CVE-2021-36947"], "modified": "2022-03-09T00:00:00", "id": "KLA12250", "href": "https://threats.kaspersky.com/en/vulnerability/KLA12250/", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-05-27T14:57:59", "description": "### *Detect date*:\n08/10/2021\n\n### *Severity*:\nCritical\n\n### *Description*:\nMultiple vulnerabilities were found in Microsoft Windows. Malicious users can exploit these vulnerabilities to execute arbitrary code, gain privileges, spoof user interface, cause denial of service, obtain sensitive information.\n\n### *Exploitation*:\nMalware exists for this vulnerability. Usually such malware is classified as Exploit. [More details](<https://threats.kaspersky.com/en/class/Exploit/>).\n\n### *Affected products*:\nWindows 10 Version 1607 for 32-bit Systems \nWindows 10 Version 20H2 for x64-based Systems \nWindows 10 Version 1909 for ARM64-based Systems \nWindows Server 2008 R2 for x64-based Systems Service Pack 1 \nWindows Server 2008 for 32-bit Systems Service Pack 2 \nWindows 8.1 for 32-bit systems \nWindows Server 2019 (Server Core installation) \nWindows 10 Version 1809 for 32-bit Systems \nWindows Server 2016 (Server Core installation) \nWindows 10 for x64-based Systems \nWindows Server 2012 (Server Core installation) \nWindows 7 for 32-bit Systems Service Pack 1 \nWindows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) \nWindows 10 Version 2004 for ARM64-based Systems \nWindows 10 Version 1909 for 32-bit Systems \nWindows Server 2019 \nWindows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) \nWindows 10 Version 1607 for x64-based Systems \nWindows Server 2008 for x64-based Systems Service Pack 2 \nWindows 10 Version 1809 for x64-based Systems \nWindows 10 for 32-bit Systems \nWindows 10 Version 20H2 for 32-bit Systems \nWindows Server, version 20H2 (Server Core Installation) \nWindows 10 Version 2004 for x64-based Systems \nWindows Server 2012 R2 \nWindows 10 Version 21H1 for 32-bit Systems \nWindows Server 2016 \nWindows RT 8.1 \nWindows 10 Version 21H1 for ARM64-based Systems \nWindows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) \nWindows 10 Version 20H2 for ARM64-based Systems \nWindows Server 2012 \nWindows 8.1 for x64-based systems \nRemote Desktop client for Windows Desktop \nWindows 7 for x64-based Systems Service Pack 1 \nWindows 10 Version 1909 for x64-based Systems \nWindows 10 Version 2004 for 32-bit Systems \nWindows 10 Version 1809 for ARM64-based Systems \nWindows 10 Version 21H1 for x64-based Systems \nWindows Server 2012 R2 (Server Core installation) \nWindows Server, version 2004 (Server Core installation)\n\n### *Solution*:\nInstall necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)\n\n### *Original advisories*:\n[CVE-2021-36948](<https://nvd.nist.gov/vuln/detail/CVE-2021-36948>) \n[CVE-2021-26424](<https://nvd.nist.gov/vuln/detail/CVE-2021-26424>) \n[CVE-2021-26433](<https://nvd.nist.gov/vuln/detail/CVE-2021-26433>) \n[CVE-2021-36945](<https://nvd.nist.gov/vuln/detail/CVE-2021-36945>) \n[CVE-2021-26432](<https://nvd.nist.gov/vuln/detail/CVE-2021-26432>) \n[CVE-2021-36926](<https://nvd.nist.gov/vuln/detail/CVE-2021-36926>) \n[CVE-2021-36942](<https://nvd.nist.gov/vuln/detail/CVE-2021-36942>) \n[CVE-2021-36947](<https://nvd.nist.gov/vuln/detail/CVE-2021-36947>) \n[CVE-2021-34487](<https://nvd.nist.gov/vuln/detail/CVE-2021-34487>) \n[CVE-2021-34530](<https://nvd.nist.gov/vuln/detail/CVE-2021-34530>) \n[CVE-2021-34480](<https://nvd.nist.gov/vuln/detail/CVE-2021-34480>) \n[CVE-2021-34534](<https://nvd.nist.gov/vuln/detail/CVE-2021-34534>) \n[CVE-2021-36927](<https://nvd.nist.gov/vuln/detail/CVE-2021-36927>) \n[CVE-2021-34486](<https://nvd.nist.gov/vuln/detail/CVE-2021-34486>) \n[CVE-2021-36932](<https://nvd.nist.gov/vuln/detail/CVE-2021-36932>) \n[CVE-2021-34533](<https://nvd.nist.gov/vuln/detail/CVE-2021-34533>) \n[CVE-2021-34537](<https://nvd.nist.gov/vuln/detail/CVE-2021-34537>) \n[CVE-2021-36937](<https://nvd.nist.gov/vuln/detail/CVE-2021-36937>) \n[CVE-2021-36936](<https://nvd.nist.gov/vuln/detail/CVE-2021-36936>) \n[CVE-2021-26425](<https://nvd.nist.gov/vuln/detail/CVE-2021-26425>) \n[CVE-2021-34483](<https://nvd.nist.gov/vuln/detail/CVE-2021-34483>) \n[CVE-2021-26431](<https://nvd.nist.gov/vuln/detail/CVE-2021-26431>) \n[CVE-2021-26426](<https://nvd.nist.gov/vuln/detail/CVE-2021-26426>) \n[CVE-2021-34536](<https://nvd.nist.gov/vuln/detail/CVE-2021-34536>) \n[CVE-2021-34484](<https://nvd.nist.gov/vuln/detail/CVE-2021-34484>) \n[CVE-2021-34535](<https://nvd.nist.gov/vuln/detail/CVE-2021-34535>) \n[CVE-2021-36933](<https://nvd.nist.gov/vuln/detail/CVE-2021-36933>) \n[CVE-2021-36938](<https://nvd.nist.gov/vuln/detail/CVE-2021-36938>) \n\n\n### *Impacts*:\nACE \n\n### *Related products*:\n[Microsoft Windows](<https://threats.kaspersky.com/en/product/Microsoft-Windows/>)\n\n### *KB list*:\n[4023814](<http://support.microsoft.com/kb/4023814>) \n[5005036](<http://support.microsoft.com/kb/5005036>) \n[5005031](<http://support.microsoft.com/kb/5005031>) \n[5005033](<http://support.microsoft.com/kb/5005033>) \n[5005030](<http://support.microsoft.com/kb/5005030>) \n[5005106](<http://support.microsoft.com/kb/5005106>) \n[5005040](<http://support.microsoft.com/kb/5005040>) \n[5005099](<http://support.microsoft.com/kb/5005099>) \n[5005043](<http://support.microsoft.com/kb/5005043>) \n[5005076](<http://support.microsoft.com/kb/5005076>) \n[5005094](<http://support.microsoft.com/kb/5005094>) \n[5011535](<http://support.microsoft.com/kb/5011535>) \n[5011564](<http://support.microsoft.com/kb/5011564>) \n[5011560](<http://support.microsoft.com/kb/5011560>) \n[5011527](<http://support.microsoft.com/kb/5011527>)\n\n### *Microsoft official advisories*:", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2021-08-10T00:00:00", "type": "kaspersky", "title": "KLA12259 Multiple vulnerabilities in Microsoft Windows", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-26424", "CVE-2021-26425", "CVE-2021-26426", "CVE-2021-26431", "CVE-2021-26432", "CVE-2021-26433", "CVE-2021-34480", "CVE-2021-34483", "CVE-2021-34484", "CVE-2021-34486", "CVE-2021-34487", "CVE-2021-34530", "CVE-2021-34533", "CVE-2021-34534", "CVE-2021-34535", "CVE-2021-34536", "CVE-2021-34537", "CVE-2021-36926", "CVE-2021-36927", "CVE-2021-36932", "CVE-2021-36933", "CVE-2021-36936", "CVE-2021-36937", "CVE-2021-36938", "CVE-2021-36942", "CVE-2021-36945", "CVE-2021-36947", "CVE-2021-36948"], "modified": "2022-10-18T00:00:00", "id": "KLA12259", "href": "https://threats.kaspersky.com/en/vulnerability/KLA12259/", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "cnvd": [{"lastseen": "2022-08-27T05:12:02", "description": "Microsoft Windows Print Spooler is a print backend processor component of Microsoft Corporation (USA).A remote code execution vulnerability exists in Microsoft Windows Print Spooler, which can be exploited by attackers to run malicious code on the system.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2021-08-12T00:00:00", "type": "cnvd", "title": "Microsoft Windows Print Spooler Remote Code Execution Vulnerability 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Printers installed via this technique also install queue-specific files, which can be arbitrary libraries to be loaded by the privileged Windows Print Spooler process.\n\n### Description\n\nMicrosoft Windows allows for users who lack administrative privileges to still be able to install printer drivers, which execute with `SYSTEM` privileges via the Print Spooler service. This ability is achieved through a capability called [Point and Print](<https://docs.microsoft.com/en-us/windows-hardware/drivers/print/introduction-to-point-and-print>). Starting with the update for [MS16-087](<https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-087>), Microsoft requires that printers installable via Point are either signed by a [WHQL release signature](<https://docs.microsoft.com/en-us/windows-hardware/drivers/install/whql-release-signature>), or are signed by a certificate that is explicitly trusted by the target system, such as an installed test signing certificate. The intention for this change is to avoid installation of malicious printer drivers, which can allow for Local Privilege Escalation (LPE) to `SYSTEM`.\n\nWhile Windows enforces that driver packages themselves are signed by a trusted source, Windows printer drivers can specify [queue-specific files](<https://docs.microsoft.com/en-us/windows-hardware/drivers/print/installing-queue-specific-files>) that are associated with the use of the device. For example, a shared printer can specify a `CopyFiles` directive for arbitrary files. These files, which may be copied over alongside the digital-signature-enforced printer driver files are **not** covered by any signature requirement. Furthermore, these files can be used to overwrite any of the signature-verified files that were placed on a system during printer driver install. The remote printer can also be configured to automatically execute code in any files dropped by the `CopyFiles` directive. This can allow for LPE to `SYSTEM` on a vulnerable system.\n\nAn exploit for this vulnerability is [publicly available](<https://twitter.com/gentilkiwi/status/1416429860566847490>).\n\n### Impact\n\nBy connecting to a malicious printer, an attacker may be able to execute arbitrary code with `SYSTEM` privileges on a vulnerable system.\n\n### Solution\n\nMicrosoft has published updates for [CVE-2021-36958](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36958>) regarding this issue. Please also consider the following workarounds:\n\n#### Block outbound SMB traffic at your network boundary\n\nPublic exploits for this vulnerability utilize SMB for connectivity to a malicious shared printer. If outbound connections to SMB resources are blocked, then this vulnerability may be mitigated for malicious SMB printers that are hosted outside of your network. Note that an attacker local to your network would be able to share a printer via SMB, which would be unaffected by any outbound SMB traffic rules.\n\n#### Configure both PackagePointAndPrintServerList and PackagePointAndPrintOnly settings\n\nMicrosoft Windows has a Group Policy called \"Package Point and Print - Approved servers\", which is reflected in the `HKLM\\Software\\Policies\\Microsoft\\Windows NT\\Printers\\PackagePointAndPrint\\PackagePointAndPrintServerList` and `HKLM\\Software\\Policies\\Microsoft\\Windows NT\\Printers\\PackagePointAndPrint\\ListofServers` registry values. This policy can restrict which servers can be used by non-administrative users to install printers via Point and Print. Configure this policy to prevent installation of printers from arbitrary servers.\n\nTo ensure that Microsoft Windows only attempts to install Package Point and Print printers, and therefore restricting printer connections to the approved servers list, you must also set the `HKLM\\SOFTWARE\\Policies\\Microsoft\\Windows NT\\Printers\\PackagePointAndPrint\\PackagePointAndPrintOnly` registry value to `1`. The Group Policy setting that corresponds to this value is called \"Use only Package Point and print\". Setting this value to \"Enabled\" will enforce that only Package Point and Print printers will be used.\n\n**Both** of these settings must be configured to protect against exploitation of this vulnerability.\n\n#### Block the ability to modify the print spooler drivers directory\n\nCourtesy of the [TRUESEC Blog](<https://blog.truesec.com/2021/06/30/fix-for-printnightmare-cve-2021-1675-exploit-to-keep-your-print-servers-running-while-a-patch-is-not-available/>), this vulnerability can be mitigated by preventing the `SYSTEM` account from being able to modify the `C:\\Windows\\System32\\spool\\drivers` directory contents.\n\nTo enable this mitigation, from a privileged PowerShell session, run:\n \n \n $Path = \"C:\\Windows\\System32\\spool\\drivers\"\n $Acl = (Get-Item $Path).GetAccessControl('Access')\n $Ar = New-Object System.Security.AccessControl.FileSystemAccessRule(\"System\", \"Modify\", \"ContainerInherit, ObjectInherit\", \"None\", \"Deny\")\n $Acl.AddAccessRule($Ar)\n Set-Acl $Path $Acl\n \n\nTo revert the mitigation to allow printer driver installation or modification, run:\n \n \n $Path = \"C:\\Windows\\System32\\spool\\drivers\"\n $Acl = (Get-Item $Path).GetAccessControl('Access')\n $Ar = New-Object System.Security.AccessControl.FileSystemAccessRule(\"System\", \"Modify\", \"ContainerInherit, ObjectInherit\", \"None\", \"Deny\")\n $Acl.RemoveAccessRule($Ar)\n Set-Acl $Path $Acl\n \n\n#### Stop and disable the Print Spooler\n\nThe Print Spooler can be disabled in a privileged PowerShell session by running the following commands:\n \n \n Stop-Service -Name Spooler -Force\n Set-Service -Name Spooler -StartupType Disabled\n \n\n**Impact of workaround** Disabling the Print Spooler service disables the ability to print both locally and remotely.\n\n### Acknowledgements\n\nThis vulnerability was publicly disclosed by Benjamin Delpy. Microsoft credits Victor Mata with reporting this issue to them.\n\nThis document was written by Will Dormann.\n\n### Vendor Information\n\n131152\n\nFilter by status: All Affected Not Affected Unknown\n\nFilter by content: __ Additional information available\n\n__ Sort by: Status Alphabetical\n\nExpand all\n\n### Microsoft Affected\n\nNotified: 2021-07-18 Updated: 2021-07-18 **CVE-2021-36958**| Affected \n---|--- \n \n#### Vendor Statement\n\nWe have not received a statement from the vendor.\n\n \n\n\n### References\n\n * <https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36958>\n * <https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-087>\n * <https://docs.microsoft.com/en-us/windows-hardware/drivers/print/introduction-to-point-and-print>\n * <https://docs.microsoft.com/en-us/windows-hardware/drivers/install/whql-release-signature>\n * <https://docs.microsoft.com/en-us/windows-hardware/drivers/print/installing-queue-specific-files>\n * <https://twitter.com/gentilkiwi/status/1416429860566847490>\n * <https://blog.truesec.com/2021/06/30/fix-for-printnightmare-cve-2021-1675-exploit-to-keep-your-print-servers-running-while-a-patch-is-not-available/>\n\n### Other Information\n\n**CVE IDs:** | [CVE-2021-36958 ](<http://web.nvd.nist.gov/vuln/detail/CVE-2021-36958>) \n---|--- \n**Date Public:** | 2021-07-18 \n**Date First Published:** | 2021-07-18 \n**Date Last Updated: ** | 2021-09-14 22:44 UTC \n**Document Revision: ** | 17 \n", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 5.9}, "published": "2021-07-18T00:00:00", "type": "cert", "title": "Microsoft Windows Print Spooler Point and Print allows installation of arbitrary queue-specific files", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 9.3, "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-1675", "CVE-2021-36958"], "modified": "2021-09-14T22:44:00", "id": "VU:131152", "href": "https://www.kb.cert.org/vuls/id/131152", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}], "threatpost": [{"lastseen": "2021-08-11T19:56:07", "description": "Microsoft has patched 51 security vulnerabilities in its scheduled August Patch Tuesday update, including seven critical bugs, two issues that were publicly disclosed but unpatched until now, and one that\u2019s listed as a zero-day that has been exploited in the wild.\n\nOf note, there are 17 elevation-of-privilege (EoP) vulnerabilities, 13 remote code-execution (RCE) issues, eight information-disclosure flaws and two denial-of-service (DoS) bugs.\n\nThe update also includes patches for three more Print Spooler bugs, familiar from the PrintNightmare saga.\n\n[](<https://threatpost.com/infosec-insider-subscription-page/>)\n\n\u201cFortunately, it was a lighter month than usual,\u201d said Eric Feldman, senior product marketing manager at Automox, in a [Patch Tuesday analysis](<https://blog.automox.com/automox-experts-weigh-in-august-patch-tuesday-2021>) from the vendor. \u201cThis represents a 56 percent reduction in overall vulnerabilities from July, and 33 percent fewer vulnerabilities on average for each month so far this year. We have also seen a similar reduction in critical vulnerabilities this month, with 30 percent less compared to the monthly average.\u201d\n\n## **Windows Critical Security Vulnerabilities**\n\nThe seven critical bugs [addressed in August](<https://msrc.microsoft.com/update-guide/>) are as follows:\n\n * CVE-2021-26424 \u2013 Windows TCP/IP RCE Vulnerability\n * CVE-2021-26432 \u2013 Windows Services for NFS ONCRPC XDR Driver RCE Vulnerability\n * CVE-2021-34480 \u2013 Scripting Engine Memory Corruption Vulnerability\n * CVE-2021-34530 \u2013 Windows Graphics Component RCE Vulnerability\n * CVE-2021-34534 \u2013 Windows MSHTML Platform RCE Vulnerability\n * CVE-2021-34535 \u2013 Remote Desktop Client RCE Vulnerability\n * CVE-2021-36936 \u2013 Windows Print Spooler RCE Vulnerability\n\nThe bug tracked as **CVE-2021-26424** exists in the TCP/IP protocol stack identified in Windows 7 and newer Microsoft operating systems, including servers.\n\n\u201cDespite its CVSS rating of 9.9, this may prove to be a trivial bug, but it\u2019s still fascinating,\u201d said Dustin Childs of Trend Micro\u2019s Zero Day Initiative (ZDI) in his [Tuesday analysis](<https://www.zerodayinitiative.com/blog/2021/8/10/the-august-2021-security-update-review>). \u201cAn attacker on a guest Hyper-V OS could execute code on the host Hyper-V server by sending a specially crafted IPv6 ping. This keeps it out of the wormable category. Still, a successful attack would allow the guest OS to completely take over the Hyper-V host. While not wormable, it\u2019s still cool to see new bugs in new scenarios being found in protocols that have been around for years.\u201d\n\nThe next bug, **CVE-2021-26432** in Windows Services, is more likely to be exploited given its low complexity status, according to Microsoft\u2019s advisory; it doesn\u2019t require privileges or user interaction to exploit, but Microsoft offered no further details.\n\n\u201cThis may fall into the \u2018wormable\u2019 category, at least between servers with NFS installed, especially since the open network computing remote procedure call (ONCRPC) consists of an External Data Representation (XDR) runtime built on the Winsock Kernel (WSK) interface,\u201d Childs said. \u201cThat certainly sounds like elevated code on a listening network service. Don\u2019t ignore this patch.\u201d\n\nAleks Haugom, product marketing manager at Automox, added, \u201cExploitation results in total loss of confidentiality across all devices managed by the same security authority. Furthermore, attackers can utilize it for denial-of-service attacks or to maliciously modify files. So far, no further details have been divulged by Microsoft or the security researcher (Liubenjin from Codesafe Team of Legendsec at Qi\u2019anxin Group) that discovered this vulnerability. Given the broad potential impact, its label \u2018Exploitation More Likely\u2019 and apparent secrecy, patching should be completed ASAP.\u201d\n\nMeanwhile, the memory-corruption bug (**CVE-2021-34480**) arises from how the scripting engine handles objects in memory, and it also allows RCE. Using a web-based attack or a malicious file, such as a malicious landing page or phishing email, attackers can use this vulnerability to take control of an affected system, install programs, view or change data, or create new user accounts with full user rights.\n\n\u201cCVE-2021-34480 should also be a priority,\u201d Kevin Breen, director of cyber-threat research at Immersive Labs, told Threatpost. \u201cIt is a low score in terms of CVSS, coming in at 6.8, but has been marked by Microsoft as \u2018Exploitation More Likely\u2019 because it is the type of attack commonly used to increase the success rate of spear phishing attacks to gain network access. Simple, but effective.\u201d\n\nThe Windows Graphic Component bug (**CVE-2021-34530**) allows attackers to remotely execute malicious code in the context of the current user, according to Microsoft \u2013 if they can social-engineer a target into opening a specially crafted file.\n\nAnother bug exists in the Windows MSHTML platform, also known as Trident (**CVE-2021-34534**). Trident is the rendering engine (mshtml.dll) used by Internet Explorer. The bug affects many Windows 10 versions (1607, 1809,1909, 2004, 20H2, 21H1) as well as Windows Server 2016 and 2019.\n\nBut while it potentially affects a large number of users, exploitation is not trivial.\n\n\u201cTo exploit, a threat actor would need to pull off a highly complex attack with user interaction \u2013 still entirely possible with the sophisticated attackers of today,\u201d said Peter Pflaster, technical product marketing manager at Automox.\n\nThe bug tracked as **CVE-2021-34535** impacts the Microsoft Remote Desktop Client, Microsoft\u2019s nearly ubiquitous utility for connecting to remote PCs.\n\n\u201cWith today\u2019s highly dispersed workforce, CVE-2021-34535, an RCE vulnerability in Remote Desktop Clients, should be a priority patch,\u201d said Breen. \u201cAttackers increasingly use RDP access as the tip of the spear to gain network access, often combining it with privilege escalation to move laterally. These can be powerful as, depending on the method, it may allow the attacker to authenticate in the network in the same way a user would, making detection difficult.\u201d\n\nIt\u2019s not as dangerous of a bug [as BlueKeep,](<https://threatpost.com/one-million-devices-open-to-wormable-microsoft-bluekeep-flaw/145113/>) according to Childs, which also affected RDP.\n\n\u201cBefore you start having flashbacks to BlueKeep, this bug affects the RDP client and not the RDP server,\u201d he said. \u201cHowever, the CVSS 9.9 bug is nothing to ignore. An attacker can take over a system if they can convince an affected RDP client to connect to an RDP server they control. On Hyper-V servers, a malicious program running in a guest VM could trigger guest-to-host RCE by exploiting this vulnerability in the Hyper-V Viewer. This is the more likely scenario and the reason you should test and deploy this patch quickly.\u201d\n\n## **Windows Print Spooler Bugs \u2013 Again**\n\nThe final critical bug is **CVE-2021-36936**, a Windows Print Spooler RCE bug that\u2019s listed as publicly known.\n\nPrint Spooler made headlines last month, when Microsoft patched what it thought was a minor elevation-of-privilege vulnerability in the service (CVE-2021-1675). But the listing was updated later in the week, after researchers from Tencent and NSFOCUS TIANJI Lab figured out it could be used for RCE \u2013 [requiring a new patch](<https://threatpost.com/microsoft-emergency-patch-printnightmare/167578/>).\n\nIt also disclosed a second bug, similar to PrintNightmare (CVE-2021-34527); and a third, [an EoP issue](<https://threatpost.com/microsoft-unpatched-bug-windows-print-spooler/167855/>) ([CVE-2021-34481](<https://support.microsoft.com/en-us/topic/kb5005652-manage-new-point-and-print-default-driver-installation-behavior-cve-2021-34481-873642bf-2634-49c5-a23b-6d8e9a302872>)).\n\n\u201cAnother month, another remote code-execution bug in the Print Spooler,\u201d said ZDI\u2019s Childs. \u201cThis bug is listed as publicly known, but it\u2019s not clear if this bug is a variant of PrintNightmare or a unique vulnerability all on its own. There are quite a few print-spooler bugs to keep track of. Either way, attackers can use this to execute code on affected systems. Microsoft does state low privileges are required, so that should put this in the non-wormable category, but you should still prioritize testing and deployment of this critical-rated bug.\u201d\n\nThe critical vulnerability is just one of three Print Spooler issues in the August Patch Tuesday release.\n\n\u201cThe specter of the PrintNightmare continues to haunt this patch Tuesday with three more print spooler vulnerabilities, CVE-2021-36947, CVE-2021-36936 and CVE-2021-34481,\u201d said Breen. \u201cAll three are listed as RCE over the network, requiring a low level of access, similar to PrintNightmare. Microsoft has marked these as \u2018Exploitation More Likely\u2019 which, if the previous speed of POC code being published is anything to go by, is certainly true.\u201d\n\n## **RCE Zero-Day in Windows Update Medic Service **\n\nThe actively exploited bug is tracked as **CVE-2021-36948** and is rated as important; it could pave the way for RCE via the Windows Update Medic Service in Windows 10 and Server 2019 and newer operating systems.\n\n\u201cUpdate Medic is a new service that allows users to repair Windows Update components from a damaged state such that the device can continue to receive updates,\u201d Automox\u2019 Jay Goodman explained. \u201cThe exploit is both low complexity and can be exploited without user interaction, making this an easy vulnerability to include in an adversary\u2019s toolbox.\u201d\n\nImmersive\u2019s Breen added, \u201cCVE-2021-36948 is a privilege-escalation vulnerability \u2013 the cornerstone of modern intrusions as they allow attackers the level of access to do things like hide their tracks and create user accounts. In the case of ransomware attacks, they have also been used to ensure maximum damage.\u201d\n\nThough the bug is being reported as being exploited in the wild by Microsoft, activity appears to remain limited or targeted: \u201cWe have seen no evidence of it at Kenna Security at this time,\u201d Jerry Gamblin, director of security research at Kenna Security (now part of Cisco) told Threatpost.\n\n## **Publicly Known Windows LSA Spoofing Bug**\n\nThe second publicly known bug (after the Print Spooler issue covered earlier) is tracked as **CVE-2021-36942**, and it\u2019s an important-rated Windows LSA (Local Security Authority) spoofing vulnerability.\n\n\u201cIt fixes a flaw that could be used to steal NTLM hashes from a domain controller or other vulnerable host,\u201d Immersive\u2019s Breen said. \u201cThese types of attacks are well known for lateral movement and privilege escalation, as has been demonstrated recently by a [new exploit called PetitPotam](<https://threatpost.com/microsoft-petitpotam-poc/168163/>). It is a post-intrusion exploit \u2013 further down the attack chain \u2013 but still a useful tool for attackers.\u201d\n\nChilds offered a bit of context around the bug.\n\n\u201cMicrosoft released this patch to further protect against NTLM relay attacks by issuing this update to block the LSARPC interface,\u201d he said. \u201cThis will impact some systems, notably Windows Server 2008 SP2, that use the EFS API OpenEncryptedFileRawA function. You should apply this to your Domain Controllers first and follow the additional guidance in [ADV210003](<https://msrc.microsoft.com/update-guide/vulnerability/ADV210003>) and [KB5005413](<https://support.microsoft.com/en-us/topic/kb5005413-mitigating-ntlm-relay-attacks-on-active-directory-certificate-services-ad-cs-3612b773-4043-4aa9-b23d-b87910cd3429>). This has been an ongoing issue since 2009, and, likely, this isn\u2019t the last we\u2019ll hear of this persistent issue.\u201d\n\nMicrosoft\u2019s next Patch Tuesday will fall on September 14.\n\nWorried about where the next attack is coming from? We\u2019ve got your back. **[REGISTER NOW](<https://threatpost.com/webinars/how-to-think-like-a-threat-actor/?utm_source=ART&utm_medium=ART&utm_campaign=August_Uptycs_Webinar>)** for our upcoming live webinar, How to **Think Like a Threat Actor**, in partnership with Uptycs on Aug. 17 at 11 AM EST and find out precisely where attackers are targeting you and how to get there first. Join host Becky Bracken and Uptycs researchers Amit Malik and Ashwin Vamshi on **[Aug. 17 at 11AM EST for this LIVE discussion](<https://threatpost.com/webinars/how-to-think-like-a-threat-actor/?utm_source=ART&utm_medium=ART&utm_campaign=August_Uptycs_Webinar>)**.\n", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 8.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "userInteraction": "REQUIRED", "version": "3.1"}, "impactScore": 5.9}, "published": "2021-08-10T21:17:58", "type": "threatpost", "title": "Actively Exploited Windows Zero-Day Gets a Patch", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 9.3, "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 10.0, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-1675", "CVE-2021-26424", "CVE-2021-26432", "CVE-2021-34480", "CVE-2021-34481", "CVE-2021-34527", "CVE-2021-34530", "CVE-2021-34534", "CVE-2021-34535", "CVE-2021-36936", "CVE-2021-36942", "CVE-2021-36947", "CVE-2021-36948"], "modified": "2021-08-10T21:17:58", "id": "THREATPOST:8D4EA8B0593FD44763915E703BC9AB72", "href": "https://threatpost.com/exploited-windows-zero-day-patch/168539/", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2021-08-13T19:49:18", "description": "One day after dropping its scheduled August Patch Tuesday update, Microsoft issued a warning about yet another unpatched privilege escalation/remote code-execution (RCE) vulnerability in the Windows Print Spooler that can be filed under the [PrintNightmare umbrella](<https://threatpost.com/cisa-mitigation-printnightmare-bug/167515/>).\n\nThe news comes amid plenty of PrintNightmare exploitation. Researchers from CrowdStrike warned in a [Wednesday report](<https://www.crowdstrike.com/blog/magniber-ransomware-caught-using-printnightmare-vulnerability/>) that the operators of the Magniber ransomware quickly weaponized CVE-2021-34527 to attack users in South Korea, with attacks dating back to at least July 13. And Cisco Talos [said Thursday](<https://blog.talosintelligence.com/2021/08/vice-society-ransomware-printnightmare.html>) that the Vice Society gang was seen using CVE-2021-1675 and CVE-2021-34527 to spread laterally across a victim\u2019s network as part of a recent ransomware attack.\n\n\u201cIn technology, almost nothing ages gracefully,\u201d Chris Clements, vice president of solutions architecture and Cerberus security officer at Cerberus Sentinel, told Threatpost. \u201cThe Print Spooler in Windows is proving that rule. It\u2019s likely that the code has changed little in the past decades and likely still bears a striking resemblance to source code that was made public in previous Windows leaks. I\u2019ve heard it said that ransomware gangs might also be referred to as \u2018technical debt collectors,\u2019 which would be funnier if the people suffering most from these vulnerabilities weren\u2019t Microsoft\u2019s customers.\u201d\n\n[](<https://threatpost.com/infosec-insider-subscription-page/?utm_source=ART&utm_medium=ART&utm_campaign=InfosecInsiders_Newsletter_Promo/>)\n\nThe fresh zero-day bug, tracked as CVE-2021-36958, carries a CVSS vulnerability-severity scale rating of 7.3, meaning that it\u2019s rated as \u201cimportant.\u201d Microsoft said that it allows for a local attack vector requiring user interaction, but that the attack complexity is low, with few privileges required.\n\n\u201cA remote code-execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations,\u201d the computing giant explained in its [Wednesday advisory](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36958>). \u201cAn attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change or delete data; or create new accounts with full user rights.\u201d\n\nThe CERT Coordination Center actually flagged the issue in mid-July, when it warned that a [working exploit](<https://twitter.com/gentilkiwi/status/1416429860566847490>) was available. That proof-of-concept (PoC), issued by Mimikatz creator Benjamin Delpy, comes complete with a video.\n\n> Hey guys, I reported the vulnerability in Dec'20 but haven't disclosed details at MSRC's request. It looks like they acknowledged it today due to the recent events with print spooler.\n> \n> \u2014 Victor Mata (@offenseindepth) [August 11, 2021](<https://twitter.com/offenseindepth/status/1425574625384206339?ref_src=twsrc%5Etfw>)\n\nOn Thursday, CERT/CC issued more details on the issue, explaining that it arises from an oversight in signature requirements around the \u201cPoint and Print\u201d capability, which allows users without administrative privileges to install printer drivers that execute with SYSTEM privileges via the Print Spooler service.\n\nWhile Microsoft requires that printers installable via Point are either signed by a WHQL release signature or by a trusted certificate, Windows printer drivers can specify queue-specific files that are associated with the use of the device, which leaves a loophole for malicious actors.\n\n\u201cFor example, a shared printer can specify a CopyFiles directive for arbitrary files,\u201d according to the CERT/CC [advisory](<https://www.kb.cert.org/vuls/id/131152>). \u201cThese files, which may be copied over alongside the digital-signature-enforced printer driver files, are not covered by any signature requirement. Furthermore, these files can be used to overwrite any of the signature-verified files that were placed on a system during printer driver install. This can allow for local privilege escalation to SYSTEM on a vulnerable system.\u201d\n\nMicrosoft credited Victor Mata of FusionX at Accenture Security with originally reporting the issue, which Mata said occurred back in December 2020:\n\n> Hey guys, I reported the vulnerability in Dec\u201920 but haven\u2019t disclosed details at MSRC\u2019s request. It looks like they acknowledged it today due to the recent events with print spooler.\n> \n> \u2014 Victor Mata (@offenseindepth) [August 11, 2021](<https://twitter.com/offenseindepth/status/1425574625384206339?ref_src=twsrc%5Etfw>)\n\nSo far, Microsoft hasn\u2019t seen any attacks in the wild using the bug, but it noted that exploitation is \u201cmore likely.\u201d With a working exploit in circulation, that seems a fair assessment.\n\n## **Print Spooler-Palooza and the PrintNightmare **\n\nDelpy characterized this latest zero-day as being part of the string of Print Spooler bugs collectively known as PrintNightmare.\n\nThe bad dream started in early July, when a PoC exploit for a bug tracked as CVE-2021-1675 was [dropped on GitHub](<https://threatpost.com/poc-exploit-windows-print-spooler-bug/167430/>). The flaw was originally addressed in [June\u2019s Patch Tuesday updates](<https://threatpost.com/microsoft-patch-tuesday-in-the-wild-exploits/166724/>) from Microsoft as a minor elevation-of-privilege vulnerability, but the PoC showed that it\u2019s actually a critical Windows security vulnerability that can be used for RCE. That prompted Microsoft to issue a different CVE number \u2013 in this case, CVE-2021-34527 \u2013 to designate the RCE variant, and it prompted [an emergency partial patch](<https://threatpost.com/microsoft-emergency-patch-printnightmare/167578/>), too.\n\n\u201cThis vulnerability is similar but distinct from the vulnerability that is assigned CVE-2021-1675, which addresses a different vulnerability in RpcAddPrinterDriverEx(),\u201d the company wrote in the advisory at the time. \u201cThe attack vector is different as well. CVE-2021-1675 was addressed by the June 2021 security update.\u201d\n\nBoth bugs \u2013 which are really just variants of a single issue \u2013 are collectively known as PrintNightmare. The PrintNightmare umbrella expanded a bit later in July, when yet another, [similar bug was disclosed](<https://threatpost.com/microsoft-unpatched-bug-windows-print-spooler/167855/>), tracked as CVE-2021-34481. It remained unpatched until it was finally addressed with [an update](<https://support.microsoft.com/en-us/topic/kb5005652-manage-new-point-and-print-default-driver-installation-behavior-cve-2021-34481-873642bf-2634-49c5-a23b-6d8e9a302872>) issued alongside the [August Patch Tuesday updates](<https://threatpost.com/exploited-windows-zero-day-patch/168539/>) (which itself detailed three additional Print Spooler vulnerabilities, one critical).\n\n## **How to Protect Systems from Print Spooler Attacks**\n\nAs mentioned, there\u2019s no patch yet for the bug, but users can protect themselves by simply stopping and disabling the Print Spooler service:\n\n\n\nSource: Microsoft.\n\nCERT/CC also said that since public exploits for Print Spooler attacks use the SMB file-sharing service for remote connectivity to a malicious shared printer, blocking outbound connections to SMB resources would thwart some attacks by blocking malicious SMB printers that are hosted outside of the network.\n\n\u201cHowever, Microsoft indicates that printers can be shared via the Web Point-and-Print Protocol, which may allow installation of arbitrary printer drivers without relying on SMB traffic,\u201d according to CERT/CC. \u201cAlso, an attacker local to your network would be able to share a printer via SMB, which would be unaffected by any outbound SMB traffic rules.\u201d\n\nIn its update advisory for CVE-2021-34481, Microsoft also detailed how to amend the default Point and Print functionality, which prevents non-administrator users from installing or updating printer drivers remotely and which could help mitigate the latest zero-day.\n\nWorried about where the next attack is coming from? We\u2019ve got your back. **[REGISTER NOW](<https://threatpost.com/webinars/how-to-think-like-a-threat-actor/?utm_source=ART&utm_medium=ART&utm_campaign=August_Uptycs_Webinar>)** for our upcoming live webinar, How to **Think Like a Threat Actor**, in partnership with Uptycs on Aug. 17 at 11 AM EST and find out precisely where attackers are targeting you and how to get there first. Join host Becky Bracken and Uptycs researchers Amit Malik and Ashwin Vamshi on **[Aug. 17 at 11AM EST for this LIVE discussion](<https://threatpost.com/webinars/how-to-think-like-a-threat-actor/?utm_source=ART&utm_medium=ART&utm_campaign=August_Uptycs_Webinar>)**.\n", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 8.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "userInteraction": "REQUIRED", "version": "3.1"}, "impactScore": 5.9}, "published": "2021-08-12T13:19:50", "type": "threatpost", "title": "Microsoft Warns: Another Unpatched PrintNightmare Zero-Day", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 9.3, "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 10.0, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-1675", "CVE-2021-34481", "CVE-2021-34527", "CVE-2021-36958"], "modified": "2021-08-12T13:19:50", "id": "THREATPOST:ADA9E95C8FD42722E783C74443148525", "href": "https://threatpost.com/microsoft-unpatched-printnightmare-zero-day/168613/", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}], "malwarebytes": [{"lastseen": "2021-08-12T12:35:46", "description": "I doubt if there has ever been a more appropriate nickname for a vulnerable service than PrintNightmare. There must be a whole host of people in Redmond having nightmares about the Windows Print Spooler service by now.\n\nPrintNightmare is the name of a set of vulnerabilities that allow a standard user on a Windows network to execute arbitrary code on an affected machine (including domain controllers) as SYSTEM, allowing them to elevate their privileges as far as domain admin. Users trigger the flaw by simply feeding a vulnerable machine a malicious printer driver. The problem was made worse by [confusion](<https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/07/patch-now-emergency-fix-for-printnightmare-released-by-microsoft/>) around whether PrintNightmare was a known, patched problem or an entirely new problem. In the end it turned out to be a bit of both.\n\n### What happened?\n\nIn June, Microsoft patched a vulnerability in the Windows Print Spooler that was listed as [CVE-2021-1675](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1675>). At first it was classified as an elevation of privilege (EoP) vulnerability. Which means that someone with limited access to a system could raise their privilege level, giving them more power over the affected system. This type of vulnerability is serious, especially when it is found in a widely used service like the Windows Print Spooler. A few weeks after the patch Microsoft raised the level of seriousness to a remote code execution (RCE) vulnerability. RCE vulnerabilities allow a malicious actor to execute their code on a different machine on the same network.\n\nIn a rush to be the first to publish a proof-of-concept (PoC), researchers published a write-up and a demo exploit to demonstrate the vulnerability. Only to find out they had alerted the world to a new 0-day vulnerability by accident. This vulnerability listed as [CVE-2021-34527](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34527>) was introduced under the name PrintNightmare.\n\nOminously, the researchers behind PrintNightmare predicted that the Print Spooler, which has seen its fair share of problems in the past, would be a fertile ground for further discoveries.\n\nAt the beginning of July, Microsoft issued a set of out-of-band patches to fix this Windows Print Spooler RCE vulnerability. Soon enough, several researchers figured out that local privilege escalation (LPE) still worked. This means that threat actors and already active malware can still exploit the vulnerability to gain SYSTEM privileges. In a demo, [Benjamin Delpy](<https://twitter.com/gentilkiwi>) showed that the update failed to fix vulnerable systems that use certain settings for a feature called Point and Print, which makes it easier for network users to obtain the printer drivers they need.\n\nOn July 13 the Cybersecurity and Infrastructure Security Agency (CISA) issued [Emergency Directive 21-04](<https://cyber.dhs.gov/ed/21-04/>), \u201cMitigate Windows Print Spooler Service Vulnerability\u201d because it became aware of multiple threat actors exploiting PrintNightmare.\n\nAlso in July, [CrowdStrike](<https://www.crowdstrike.com/blog/magniber-ransomware-caught-using-printnightmare-vulnerability/>) identified Magniber ransomware attempting to use a known PrintNightmare vulnerability to compromise victims.\n\n### An end to the nightmare?\n\nIn the August 10 [Patch Tuesday](<https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/08/printnightmare-and-rdp-rce-among-major-issues-tackled-by-patch-tuesday/>) update, the Print Spooler service was subject to _yet more_ patching, and Microsoft said that this time its patch should address all publicly documented security problems with the service.\n\nIn an unusual breaking change, one part of the update made admin rights required before using the Windows Point and Print feature.\n\n### Just one day later\n\nOn August 11, Microsoft released information about [CVE-2021-36958](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36958>), yet another 0-day that allows local attackers to gain SYSTEM privileges on a computer. Again, it was security researcher Benjamin Delpy who [demonstrated](<https://vimeo.com/581584478>) the vulnerability, showing that threat actors can still gain SYSTEM privileges simply by connecting to a remote print server.\n\n### Mitigation\n\nThe workaround offered by Microsoft is stopping and disabling the Print Spooler service, although at this point you may be seriously considering a revival of the paperless office idea. So:\n\n * Disable the Print Spooler service on machines that do not need it. Please note that stopping the service without disabling may not be enough.\n * For the systems that do need the Print Spooler service to be running make sure they are not exposed to the Internet.\n\nMicrosoft says it is investigating the vulnerability and working on (yet another) security update.\n\nLike I said [yesterday](<https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/08/printnightmare-and-rdp-rce-among-major-issues-tackled-by-patch-tuesday/>): To be continued.\n\nThe post [Microsoft&#x27;s PrintNightmare continues, shrugs off Patch Tuesday fixes](<https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/08/microsofts-printnightmare-continues-shrugs-off-patch-tuesday-fixes/>) appeared first on [Malwarebytes Labs](<https://blog.malwarebytes.com>).", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 8.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "userInteraction": "REQUIRED", "version": "3.1"}, "impactScore": 5.9}, "published": "2021-08-12T11:30:26", "type": "malwarebytes", "title": "Microsoft\u2019s PrintNightmare continues, shrugs off Patch Tuesday fixes", "bulletinFamily": "blog", "cvss2": {"severity": "HIGH", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 9.3, "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 10.0, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-1675", "CVE-2021-34527", "CVE-2021-36958"], "modified": "2021-08-12T11:30:26", "id": "MALWAREBYTES:7F8FC685D6EFDE8FC4909FDA86D496A5", "href": "https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/08/microsofts-printnightmare-continues-shrugs-off-patch-tuesday-fixes/", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2021-08-11T14:38:54", "description": "The sheer number of patches (44 security vulnerabilities) should be enough to scare us, but unfortunately we have gotten used to those numbers. In fact, 44 is a low number compared to what we have seen on recent Patch Tuesdays. So what are the most notable vulnerabilities that were patched.\n\n * One actively exploited vulnerability\n * One vulnerability that has a CVSS score of 9.9 out of 10\n * And yet another attempt to fix PrintNightmare\n\nLet\u2019s go over these worst cases to get an idea of what we are up against.\n\n### CVEs\n\nPublicly disclosed computer security flaws are listed in the Common Vulnerabilities and Exposures (CVE) database. Its goal is to make it easier to share data across separate vulnerability capabilities (tools, databases, and services).\n\n### Actively exploited\n\n[CVE-2021-36948](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36948>) is an [elevation of privilege (EoP)](<https://blog.malwarebytes.com/glossary/privilege-escalation/>) vulnerability in the Windows Update Medic Service. The Windows Update Medic Service is a background service that was introduced with Windows 10 and handles the updating process. Its only purpose is to repair the Windows Update service so that your PC can continue to receive updates unhindered. Besides on Windows 10 it also runs on Windows Server 2019. According to Microsoft CVE-2021-36948 is being actively exploited, but it is not aware of exploit code publicly available. [Reportedly](<https://blog.automox.com/automox-experts-weigh-in-august-patch-tuesday-2021>), the exploit is both low complexity and can be exploited without user interaction, making this an easy vulnerability to include in an adversaries toolbox. The bug is only locally exploitable, but local elevation of privilege is exactly what ransomware gangs will be looking to do after breaching a network, for example.\n\n### 9.9 out of 10\n\n[CVE-2021-34535](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34535>) is a [Remote Code Execution (RCE)](<https://blog.malwarebytes.com/glossary/remote-code-execution-rce-attack/>) vulnerability in Windows TCP/IP. This is remotely exploitable by a malicious Hyper-V guest sending an ipv6 ping to the Hyper-V host. An attacker could send a specially crafted TCPIP packet to its host. This vulnerability exists in the TCP/IP protocol stack identified in Windows 7 and newer Microsoft operating systems, including servers.\n\nThis vulnerability received a CVSS score of 9.9 out of 10. The CVSS standards are used to help security researchers, software users, and vulnerability tracking organizations measure and report on the severity of vulnerabilities. CVSS can also help security teams and developers prioritize threats and allocate resources effectively.\n\n### 9.8 out of 10\n\nAnother high scorer is [CVE-2021-26432](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26432>), an RCE in the Windows Services for NFS ONCRPC XDR Driver. Open Network Computing (ONC) Remote Procedure Call (RPC) is a remote procedure call system. ONC was originally developed by Sun Microsystems. The NFS protocol is independent of the type of operating system, network architecture, and transport protocols. The Windows service for the driver makes sure that Windows computers can use this protocol. This vulnerability got a high score because it is known to be easy to exploit and can be initiated remotely.\n\n### More RDP\n\n[CVE-2021-34535](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34535>) is an RCE in the Remote Desktop Client. Microsoft lists two exploit scenarios for this vulnerability:\n\n * In the case of a Remote Desktop connection, an attacker with control of a Remote Desktop Server could trigger a remote code execution (RCE) on the machine when a victim connects to the attacking server with the vulnerable Remote Desktop Client.\n * In the case of Hyper-V, a malicious program running in a guest VM could trigger guest-to-host RCE by exploiting this vulnerability in the Hyper-V Viewer when a victim running on the host connects to the attacking Hyper-V guest.\n\nSince this is a client-side vulnerability, an attacker would have to convince a user to authenticate to a malicious RDP server, where the server could then trigger the bug on the client side. Combined with other RDP weaknesses however, this vulnerability would be easy to chain into a full system take-over.\n\n### Never-ending nightmare of PrintNightmare\n\nThe Print Spooler service was subject to yet more patching. The researchers behind PrintNightmare predicted that it would be a fertile ground for further discoveries, and they seem to be right. I\u2019d be tempted to advise Microsoft to start from scratch instead of patching patches on a very old chunk of code.\n\n[CVE-2021-36936](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36936>) an RCE vulnerability in Windows Print Spooler. A vulnerability that was publicly disclosed, which may be related to several bugs in Print Spooler that were identified by researchers over the past few months (presumably PrintNightmare).\n\n[CVE-2021-34481](<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-34481>) and [CVE-2021-34527](<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-34527>) are RCE vulnerabilities that could allow attackers to run arbitrary code with SYSTEM privileges.\n\nMicrosoft said the Print Spooler patch it pushed this time should address all publicly documented security problems with the service. In an unusual step, it has made a breaking change: \u201cToday we are addressing this risk by changing the default Point and Print driver installation and update behavior to require administrator privileges.\u201d\n\nTo be continued, we suspect.\n\nThe post [PrintNightmare and RDP RCE among major issues tackled by Patch Tuesday](<https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/08/printnightmare-and-rdp-rce-among-major-issues-tackled-by-patch-tuesday/>) appeared first on [Malwarebytes Labs](<https://blog.malwarebytes.com>).", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 8.8, "privilegesRequired": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 5.9}, "published": "2021-08-11T12:16:17", "type": "malwarebytes", "title": "PrintNightmare and RDP RCE among major issues tackled by Patch Tuesday", "bulletinFamily": "blog", "cvss2": {"severity": "HIGH", "exploitabilityScore": 8.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 9.0, "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "SINGLE"}, "acInsufInfo": false, "impactScore": 10.0, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-26432", "CVE-2021-34481", "CVE-2021-34527", "CVE-2021-34535", "CVE-2021-36936", "CVE-2021-36948"], "modified": "2021-08-11T12:16:17", "id": "MALWAREBYTES:9F3181D8BD5EF0E44A305AF69898B9E0", "href": "https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/08/printnightmare-and-rdp-rce-among-major-issues-tackled-by-patch-tuesday/", "cvss": {"score": 9.0, "vector": "AV:N/AC:L/Au:S/C:C/I:C/A:C"}}, {"lastseen": "2021-09-17T16:35:06", "description": "The September 2021 Patch Tuesday could be remembered as the _final_ patching attempt in the PrintNightmare\u2026 nightmare. The ease with which the vulnerabilities [shrugged off the August patches](<https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/08/microsofts-printnightmare-continues-shrugs-off-patch-tuesday-fixes/>) doesn\u2019t look to get a rerun. So far we haven\u2019t seen any indications that this patch is so easy to circumvent.\n\nThe total count of fixes for this Patch Tuesday tallies up to 86, including 26 for Microsoft Edge alone. Only a few of these vulnerabilities are listed as zero-days and two of them are &quot;old friends&quot;. There is a third, less-likely-to-be-exploited one, and then we get to introduce a whole new set of vulnerabilities nicknamed OMIGOD, for reasons that will become obvious.\n\nAzure was the subject of five CVE\u2019s, one of them listed as critical. The four that affect the Open Management Infrastructure (OMI) were found by researchers, grouped together and received the nickname OMIGOD.\n\n### PrintNightmare\n\nPrintNightmare is the name of a set of vulnerabilities that allow a standard user on a Windows network to execute arbitrary code on an affected machine (including domain controllers) as SYSTEM, allowing them to elevate their privileges as far as domain admin. Users trigger the flaw by simply feeding a malicious printer driver to a vulnerable machine, and could use their new-found superpowers to install programs; view, change, or delete data; or create new accounts with full user rights.\n\nThe problem was made worse by significant [confusion](<https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/07/patch-now-emergency-fix-for-printnightmare-released-by-microsoft/>) about whether PrintNightmare was a known, patched problem or an entirely new problem, and by repeated, at best partially-successful, attempts to patch it.\n\nThis month, Microsoft patched the remaining Print Spooler vulnerabilities under [CVE-2021-36958](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36958>). Fingers crossed.\n\n### MSHTML\n\nThis zero-day vulnerability that felt like a ghost from the past (it involved ActiveX, remember that?) was only [found last week](<https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/09/windows-mshtml-zero-day-actively-exploited-mitigations-required/>), but has attracted significant attention. It was listed as [CVE-2021-40444](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40444>), a Remote Code Execution (RCE) vulnerability in Microsoft MSHTML. \n\nThreat actors were sharing PoCs, tutorials and exploits on hacking forums, so that every script kiddy and wannabe hacker was able to follow step-by-step instructions in order to launch their own attacks. Microsoft published mitigation instructions that disabled the installation of new ActiveX controls, but this turned out to be easy to work around for attackers.\n\nGiven the short window of opportunity, there was some doubt about whether a fix would be included in this Patch Tuesday, but it looks like Microsoft managed to pull it off.\n\n### DNS elevation of privilege vulnerability\n\nThis vulnerability was listed as [CVE-2021-36968](<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-36968>) and affects systems running Windows Server 2008 R2 SP1, SP2 and Windows 7 SP1. It exists due to an application that does not properly impose security restrictions in Windows DNS. The vulnerability is listed as a zero-day because it has been publicly disclosed, not because it is actively being exploited.\n\nMicrosoft says that exploitation is \u201cless likely\u201d, perhaps because it requires initial authentication and can only be exploited locally. If these conditions are met this bug can be used to accomplish elevation of privilege (EoP). \n\n### OMIGOD\n\nOMIGOD is the name for a set of four vulnerabilities in the Open Management Infrastructure (OMI) that you will find embedded in many popular Azure services. The CVEs are:\n\n * [CVE-2021-38647](<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-38647>) OMI RCE Vulnerability with a [CVSS score](<https://blog.malwarebytes.com/malwarebytes-news/2020/05/how-cvss-works-characterizing-and-scoring-vulnerabilities/>) of 9.8 out of 10.\n * [CVE-2021-38648](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38648>) Open Management Infrastructure Elevation of Privilege Vulnerability\n * [CVE-2021-38645](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38645>) Open Management Infrastructure Elevation of Privilege Vulnerability\n * [CVE-2021-38649](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38649>) Open Management Infrastructure Elevation of Privilege Vulnerability\n\nThe [researchers](<https://www.wiz.io/blog/secret-agent-exposes-azure-customers-to-unauthorized-code-execution>) that discovered the vulnerabilities consider OMIGOD to be a result of the supply-chain risks that come with using open-source code:\n\n> Wiz\u2019s research team recently discovered a series of alarming vulnerabilities that highlight the supply chain risk of open source code, particularly for customers of cloud computing services.\n\nOMI runs as root (the highest privilege level) and is activated within Azure when users enable certain services, like distributed logging, or other management tools and services. It&#x27;s likely that many users aren&#x27;t even aware they have it running.\n\nThe RCE vulnerability (CVE-2021-38647) can be exploited in situations where the OMI ports are accessible to the Internet to allow for remote management. In this configuration, any user can communicate with it using a UNIX socket or via an HTTP API, and any user can abuse it to remotely execute code or escalate privileges.\n\nA coding mistake means that any incoming request to the service _without_ an authorization header has its privileges default to uid=0, gid=0, which is root. \n \nOMIGOD, right?\n\nThe researchers report that the flaw can only be used to remotely takeover a target when OMI exposes the HTTPS management port externally. This is the default configuration when installed standalone and in Azure Configuration Management or System Center Operations Manager (SCOM). Other Azure services (such as Log Analytics) do not expose this port, so in those cases the scope is limited to local privilege escalation.\n\nThey advise all Azure customers to connect to their Azure VMs and run the commands below in their terminal to ensure OMI is updated to the latest version:\n\n * For Debian systems (e.g., Ubuntu): `dpkg -l omi`\n * For Redhat based system (e.g., Fedora, CentOS, RHEL): `rpm -qa omi`\n\nIf OMI isn\u2019t installed, the commands won&#x27;t return any results, and your machine isn\u2019t vulnerable. Version 1.6.8.1 is the patched version. All earlier versions need to be patched.\n\n## Update September 17, 2021\n\nAfter a proof-of-concept exploit was published on code hosting website GitHub, attackers we re noticed to be looking for Linux servers running on Microsoft\u2019s Azure cloud infrastructure. These systems are vulnerable to the security flaw called OMIGOD.\n\nAccording to reports from security researchers the attackers use the OMIGOD exploit, to deploy malware that ensnares the hacked server into cryptomining or DDoS botnets.\n\nThe post [[updated] Patch now! PrintNightmare over, MSHTML fixed, a new horror appears \u2026 OMIGOD](<https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/09/patch-now-printnightmare-over-mshtml-fixed-a-new-horror-appears-omigod/>) appeared first on [Malwarebytes Labs](<https://blog.malwarebytes.com>).", "cvss3": {}, "published": "2021-09-15T13:19:48", "type": "malwarebytes", "title": "[updated] Patch now! PrintNightmare over, MSHTML fixed, a new horror appears \u2026 OMIGOD", "bulletinFamily": "blog", "cvss2": {}, "cvelist": ["CVE-2021-36958", "CVE-2021-36968", "CVE-2021-38645", "CVE-2021-38647", "CVE-2021-38648", "CVE-2021-38649", "CVE-2021-40444"], "modified": "2021-09-15T13:19:48", "id": "MALWAREBYTES:76333D1F0FCAFD79FA2EDD4A4CAFBB38", "href": "https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/09/patch-now-printnightmare-over-mshtml-fixed-a-new-horror-appears-omigod/", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}], "securelist": [{"lastseen": "2021-11-26T12:37:38", "description": "\n\n * [IT threat evolution Q3 2021](<https://securelist.com/it-threat-evolution-q3-2021/104876/>)\n * **IT threat evolution in Q3 2021. PC statistics**\n * [IT threat evolution in Q3 2021. Mobile statistics](<https://securelist.com/it-threat-evolution-in-q3-2021-mobile-statistics/105020/>)\n\n_These statistics are based on detection verdicts of Kaspersky products received from users who consented to providing statistical data._\n\n## Quarterly figures\n\nAccording to Kaspersky Security Network, in Q3 2021:\n\n * Kaspersky solutions blocked 1,098,968,315 attacks from online resources across the globe.\n * Web Anti-Virus recognized 289,196,912 unique URLs as malicious.\n * Attempts to run malware for stealing money from online bank accounts were stopped on the computers of 104,257 unique users.\n * Ransomware attacks were defeated on the computers of 108,323 unique users.\n * Our File Anti-Virus detected 62,577,326 unique malicious and potentially unwanted objects.\n\n## Financial threats\n\n### Financial threat statistics\n\nIn Q3 2021, Kaspersky solutions blocked the launch of at least one piece of banking malware on the computers of 104,257 unique users.\n\n_Number of unique users attacked by financial malware, Q3 2021 ([download](<https://media.kasperskycontenthub.com/wp-content/uploads/sites/43/2021/11/23150303/01-en-malware-report-q3-2021-pc-graphs.png>))_\n\n**Geography of financial malware attacks**\n\n_To evaluate and compare the risk of being infected by banking Trojans and ATM/POS malware worldwide, for each country we calculated the share of users of Kaspersky products who faced this threat during the reporting period as a percentage of all users of our products in that country._\n\n_Geography of financial malware attacks, Q3 2021 ([download](<https://media.kasperskycontenthub.com/wp-content/uploads/sites/43/2021/11/23150355/02-en-malware-report-q3-2021-pc-graphs.png>))_\n\n**Top 10 countries by share of attacked users**\n\n| **Country*** | **%**** \n---|---|--- \n1 | Turkmenistan | 5.4 \n2 | Tajikistan | 3.7 \n3 | Afghanistan | 3.5 \n4 | Uzbekistan | 3.0 \n5 | Yemen | 1.9 \n6 | Kazakhstan | 1.6 \n7 | Paraguay | 1.6 \n8 | Sudan | 1.6 \n9 | Zimbabwe | 1.4 \n10 | Belarus | 1.1 \n \n_* Excluded are countries with relatively few Kaspersky product users (under 10,000)._ \n_** Unique users whose computers were targeted by financial malware as a percentage of all unique users of Kaspersky products in the country._\n\n**Top 10 banking malware families**\n\n| Name | Verdicts | %* \n---|---|---|--- \n1 | Zbot | Trojan.Win32.Zbot | 17.7 \n2 | SpyEye | Trojan-Spy.Win32.SpyEye | 17.5 \n3 | CliptoShuffler | Trojan-Banker.Win32.CliptoShuffler | 9.6 \n4 | Trickster | Trojan.Win32.Trickster | 4.5 \n5 | RTM | Trojan-Banker.Win32.RTM | 3.6 \n6 | Nimnul | Virus.Win32.Nimnul | 3.0 \n7 | Gozi | Trojan-Banker.Win32.Gozi | 2.7 \n8 | Danabot | Trojan-Banker.Win32.Danabot | 2.4 \n9 | Tinba | Trojan-Banker.Win32.Tinba | 1.5 \n10 | Cridex | Backdoor.Win32.Cridex | 1.3 \n \n_* Unique users who encountered this malware family as a percentage of all users attacked by financial malware._\n\nIn Q3, the family ZeuS/Zbot (17.7%), as usual, became the most widespread family of bankers. Next came the SpyEye (17.5%) family, whose share doubled from 8.8% in the previous quarter. The Top 3 was rounded out by the CliptoShuffler family (9.6%) \u2014 one position and just 0.3 p.p. down. The families Trojan-Banker.Win32.Gozi (2.7%) and Trojan-Banker.Win32.Tinba (1.5%) have made it back into the Top 10 in Q3 \u2014 seventh and ninth places, respectively.\n\n## Ransomware programs\n\n### Quarterly trends and highlights\n\n#### Attack on Kaseya and the REvil story\n\nIn early July, the group REvil/Sodinokibi [attempted an attack](<https://securelist.com/revil-ransomware-attack-on-msp-companies/103075/>) on the remote administration software Kaseya VSA, compromising several managed services providers (MSP) who used this system. Thanks to this onslaught on the supply chain, the attackers were able to infect over one thousand of the compromised MSPs&#x27; client businesses. REvil&#x27;s original $70 million ransom demand in exchange for decryption of all the users hit by the attack was soon moderated to 50 million.\n\nFollowing this massive attack, law enforcement agencies stepped up their attention to REvil, so by mid-July the gang turned off their Trojan infrastructure, suspended new infections and dropped out of sight. Meanwhile, Kaseya got a universal decryptor for all those affected by the attack. [According to](<https://helpdesk.kaseya.com/hc/en-gb/articles/4403440684689-Important-Notice-August-4th-2021>) Kaseya, it &quot;did not pay a ransom \u2014 either directly or indirectly through a third party&quot;. Later [it emerged](<https://www.washingtonpost.com/national-security/ransomware-fbi-revil-decryption-key/2021/09/21/4a9417d0-f15f-11eb-a452-4da5fe48582d_story.html>) that the company got the decryptor and the key from the FBI.\n\nBut already in the first half of September, REvil was up and running again. [According to](<https://www.bleepingcomputer.com/news/security/revil-ransomware-is-back-in-full-attack-mode-and-leaking-data/>) the hacking forum XSS, the group&#x27;s former public representative known as UNKN &quot;disappeared&quot;, and the malware developers, failing to find him, waited awhile and restored the Trojan infrastructure from backups.\n\n#### The arrival of BlackMatter: DarkSide restored?\n\nAs we already wrote in our Q2 report, the group DarkSide folded its operations after their &quot;too high-profile&quot; attack on Colonial Pipeline. And now there is a &quot;new&quot; arrival known as BlackMatter, which, as its members [claim](<https://therecord.media/an-interview-with-blackmatter-a-new-ransomware-group-thats-learning-from-the-mistakes-of-darkside-and-revil>), represents the &quot;best&quot; of DarkSide, REvil and LockBit.\n\nFrom our analysis of the BlackMatter Trojan&#x27;s executable we conclude that most likely it was built using DarkSide&#x27;s source codes.\n\n#### Q3 closures\n\n * Europol and the Ukrainian police have [arrested](<https://www.europol.europa.eu/newsroom/news/ransomware-gang-arrested-in-ukraine-europol's-support>) two members of an unnamed ransomware gang. The only detail made known is that the ransom demands amounted to \u20ac5 to \u20ac70 million.\n * Following its attack on Washington DC&#x27;s Metropolitan Police Department, the group Babuk folded (or just suspended) its operations and published an archive containing the Trojan&#x27;s source code, build tools and keys for some of the victims.\n * At the end of August, Ragnarok (not to be confused with RagnarLocker) suddenly called it a day, deleted all their victims&#x27; info from their portal and published the master key for decryption. The group gave no reasons for this course of action.\n\n#### Exploitation of vulnerabilities and new attack methods\n\n * The group HelloKitty used to distribute its ransomware by exploiting the vulnerability CVE-2019-7481 in SonicWall gateways.\n * Magniber and Vice Society penetrated the target systems by exploiting the vulnerabilities from the PrintNightmare family (CVE-2021-1675, CVE-2021-34527, CVE-2021-36958).\n * The group LockFile exploited ProxyShell vulnerabilities (CVE-2021-34473, CVE-2021-34523, CVE-2021-31207) to penetrate the victim&#x27;s network; for lateral expansion they relied on the new PetitPotam attack that gained control of the domain controller.\n * The group Conti also used ProxyShell exploits for its attacks.\n\n### Number of new ransomware modifications\n\nIn Q3 2021, we detected 11 new ransomware families and 2,486 new modifications of this malware type.\n\n_Number of new ransomware modifications, Q3 2020 \u2014 Q3 2021 ([download](<https://media.kasperskycontenthub.com/wp-content/uploads/sites/43/2021/11/23150433/03-en-ru-es-malware-report-q3-2021-pc-graphs.png>))_\n\n## Number of users attacked by ransomware Trojans\n\nIn Q3 2021, Kaspersky products and technologies protected 108,323 users from ransomware attacks.\n\n_Number of unique users attacked by ransomware Trojans, Q3 2021 ([download](<https://media.kasperskycontenthub.com/wp-content/uploads/sites/43/2021/11/23150459/04-en-malware-report-q3-2021-pc-graphs.png>))_\n\n## Geography of ransomware attacks\n\n_Geography of attacks by ransomware Trojans, Q3 2021 ([download](<https://media.kasperskycontenthub.com/wp-content/uploads/sites/43/2021/11/23150535/05-en-malware-report-q3-2021-pc-graphs.png>))_\n\n**Top 10 countries attacked by ransomware Trojans**\n\n| **Country*** | **%**** \n---|---|--- \n1 | Bangladesh | 1.98 \n2 | Uzbekistan | 0.59 \n3 | Bolivia | 0.55 \n4 | Pakistan | 0.52 \n5 | Myanmar | 0.51 \n6 | China | 0.51 \n7 | Mozambique | 0.51 \n8 | Nepal | 0.48 \n9 | Indonesia | 0.47 \n10 | Egypt | 0.45 \n \n_* Excluded are countries with relatively few Kaspersky users (under 50,000). \n** Unique users attacked by ransomware Trojans as a percentage of all unique users of Kaspersky products in the country._\n\n## Top 10 most common families of ransomware Trojans\n\n| **Name** | **Verdicts** | **%*** \n---|---|---|--- \n1 | Stop/Djvu | Trojan-Ransom.Win32.Stop | 27.67% \n2 | (generic verdict) | Trojan-Ransom.Win32.Crypren | 17.37% \n3 | WannaCry | Trojan-Ransom.Win32.Wanna | 11.84% \n4 | (generic verdict) | Trojan-Ransom.Win32.Gen | 7.78% \n5 | (generic verdict) | Trojan-Ransom.Win32.Encoder | 5.58% \n6 | (generic verdict) | Trojan-Ransom.Win32.Phny | 5.57% \n7 | PolyRansom/VirLock | Virus.Win32.Polyransom / Trojan-Ransom.Win32.PolyRansom | 2.65% \n8 | (generic verdict) | Trojan-Ransom.Win32.Agent | 2.04% \n9 | (generic verdict) | Trojan-Ransom.MSIL.Encoder | 1.07% \n10 | (generic verdict) | Trojan-Ransom.Win32.Crypmod | 1.04% \n \n_* Unique Kaspersky users attacked by this family of ransomware Trojans as a percentage of all users attacked by such malware._\n\n## Miners\n\n### Number of new miner modifications\n\nIn Q3 2021, Kaspersky solutions detected 46,097 new modifications of miners.\n\n_Number of new miner modifications, Q3 2021 ([download](<https://media.kasperskycontenthub.com/wp-content/uploads/sites/43/2021/11/23150605/06-en-malware-report-q3-2021-pc-graphs.png>))_\n\n### Number of users attacked by miners\n\nIn Q3, we detected attacks using miners on the computers of 322,131 unique users of Kaspersky products worldwide. And while during Q2 the number of attacked users gradually decreased, the trend was reversed in July and August 2021. With slightly over 140,000 unique users attacked by miners in July, the number of potential victims almost reached 150,000 in September.\n\n_Number of unique users attacked by miners, Q3 2021 ([download](<https://media.kasperskycontenthub.com/wp-content/uploads/sites/43/2021/11/23150635/07-en-malware-report-q3-2021-pc-graphs.png>))_\n\n### Geography of miner attacks\n\n_Geography of miner attacks, Q3 2021 ([download](<https://media.kasperskycontenthub.com/wp-content/uploads/sites/43/2021/11/23150710/08-en-malware-report-q3-2021-pc-graphs.png>))_\n\n**Top 10 countries attacked by miners**\n\n| **Country*** | **%**** \n---|---|--- \n1 | Ethiopia | 2.41 \n2 | Rwanda | 2.26 \n3 | Myanmar | 2.22 \n4 | Uzbekistan | 1.61 \n5 | Ecuador | 1.47 \n6 | Pakistan | 1.43 \n7 | Tanzania | 1.40 \n8 | Mozambique | 1.34 \n9 | Kazakhstan | 1.34 \n10 | Azerbaijan | 1.27 \n \n_* Excluded are countries with relatively few users of Kaspersky products (under 50,000). \n** Unique users attacked by miners as a percentage of all unique users of Kaspersky products in the country._\n\n## Vulnerable applications used by cybercriminals during cyberattacks\n\n### Quarter highlights\n\nMuch clamor was caused in Q3 by a whole new family of vulnerabilities in Microsoft Windows printing subsystem, one already known to the media as PrintNightmare: [CVE-2021-1640](<https://nvd.nist.gov/vuln/detail/CVE-2021-1640>), [CVE-2021-26878](<https://nvd.nist.gov/vuln/detail/CVE-2021-26878>), [CVE-2021-1675](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1675>), [CVE-2021-34527](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34527>), [CVE-2021-36936](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36936>), [CVE-2021-36947](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36947>), [CVE-2021-34483](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34483>). All those vulnerabilities allow for local escalation of privileges or remote execution of commands with system rights and, as they require next to nothing for exploitation, they are often used by popular mass infection tools. To fix them, several Microsoft patches are required.\n\nThe vulnerability known as PetitPotam proved no less troublesome. It allows an unprivileged user to take control of a Windows domain computer \u2014 or even a domain controller \u2014 provided the Active Directory certificate service is present and active.\n\nIn the newest OS Windows 11, even before its official release, the vulnerability [CVE-2021-36934](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34483>) was detected and dubbed HiveNightmare/SeriousSam. It allows an unprivileged user to copy all the registry threads, including SAM, through the shadow copy mechanism, potentially exposing passwords and other critical data.\n\nIn Q3, attackers greatly favored exploits targeting the vulnerabilities ProxyToken, ProxyShell and ProxyOracle ([CVE-2021-31207](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31207>), [CVE-2021-34473](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34473>), [CVE-2021-31207](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31207>), [CVE-2021-33766](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-33766>), [CVE-2021-31195](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31195>), [CVE-2021-31196](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31196>)). If exploited in combination, these open full control of mail servers managed by Microsoft Exchange Server. We already covered [similar vulnerabilities](<https://securelist.com/zero-day-vulnerabilities-in-microsoft-exchange-server/101096/>) \u2014 for instance, they were used in a HAFNIUM attack, also targeting Microsoft Exchange Server.\n\nAs before, server attacks relying on brute-forcing of passwords to various network services, such as MS SQL, RDP, etc., stand out among Q3 2021 network threats. Attacks using the exploits EternalBlue, EternalRomance and similar are as popular as ever. Among the new ones is the grim vulnerability enabling remote code execution when processing the Object-Graph Navigation Language in the product Atlassian Confluence Server ([CVE-2021-26084](<https://jira.atlassian.com/browse/CONFSERVER-67940>)) often used in various corporate environments. Also, Pulse Connect Secure was found to contain the vulnerability [CVE-2021-22937](<https://nvd.nist.gov/vuln/detail/CVE-2021-22937>), which however requires the administrator password for it to be exploited.\n\n### Statistics\n\nAs before, exploits for Microsoft Office vulnerabilities are still leading the pack in Q3 2021 (60,68%). These are popular due to the large body of users, most of whom still use older versions of the software, thus making the attackers&#x27; job much easier. The share of Microsoft Office exploits increased by almost 5 p.p. from the previous quarter. Among other things, it was due to the fact that the new vulnerability [CVE-2021-40444](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40444>) was discovered in the wild, instantly employed to compromise user machines. The attacker can exploit it by using the standard functionality that allows office documents to download templates, implemented with the help of special ActiveX components. There is no proper validation of the processed data during the operation, so any malicious code can be downloaded. As you are reading this, the relevant security update is already available.\n\nThe way individual Microsoft Office vulnerabilities are ranked by the number of detections does not change much with time: the first positions are still shared by [CVE-2018-0802](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0802>) and [CVE-2017-8570](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8570>), with another popular vulnerability [CVE-2017-11882](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11882>) not far behind. We already covered these many times \u2014 all the above-mentioned vulnerabilities execute commands on behalf of the user and infect the system.\n\n_Distribution of exploits used by cybercriminals, by type of attacked application, Q3 2021 ([download](<https://media.kasperskycontenthub.com/wp-content/uploads/sites/43/2021/11/23151038/09-en-malware-report-q3-2021-pc-graphs.png>))_\n\nThe share of exploits for the popular browsers fell by 3 p.p. from the previous reporting period to 25.57% in Q3. In the three months covered by the report several vulnerabilities were discovered in Google Chrome browser and its script engine V8 \u2014 some of them in the wild. Among these, the following JavaScript engine vulnerabilities stand out: [CVE-2021-30563](<https://chromereleases.googleblog.com/2021/07/stable-channel-update-for-desktop.html>) (type confusion error corrupting the heap memory), [CVE-2021-30632](<https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html>) (out-of-bounds write in V8) and [CVE-2021-30633](<https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html>) (use-after-free in Indexed DB). All these can potentially allow remote execution of code. But it should be remembered that for modern browsers a chain of several exploits is often required to leave the sandbox and secure broader privileges in the system. It should also be noted that with Google Chromium codebase (in particular the Blink component and V8) being used in many browsers, any newly detected Google Chrome vulnerability automatically makes other browsers built with its open codebase vulnerable.\n\nThe third place if held by Google Android vulnerabilities (5.36%) \u2014 1 p.p. down from the previous period. They are followed by exploits for Adobe Flash (3.41%), their share gradually decreasing. The platform is no longer supported but is still favored by users, which is reflected in our statistics.\n\nOur ranking is rounded out by vulnerabilities for Java (2.98%), its share also noticeably lower, and Adobe PDF (1.98%).\n\n## Attacks on macOS\n\nWe will remember Q3 2021 for the two interesting revelations. The first one is the use of [malware code targeting macOS](<https://securelist.com/wildpressure-targets-macos/103072/>) as part of the WildPressure campaign. The second is the detailed [review of the previously unknown FinSpy implants](<https://securelist.com/finspy-unseen-findings/104322/>) for macOS.\n\nSpeaking of the most widespread threats detected by Kaspersky security solutions for macOS, most of our Top 20 ranking positions are occupied by various adware apps. Among the noteworthy ones is Monitor.OSX.HistGrabber.b (second place on the list) \u2014 this potentially unwanted software sends user browser history to its owners&#x27; servers.\n\n**Top 20 threats for macOS**\n\n| **Verdict** | **%*** \n---|---|--- \n1 | AdWare.OSX.Pirrit.j | 13.22 \n2 | Monitor.OSX.HistGrabber.b | 11.19 \n3 | AdWare.OSX.Pirrit.ac | 10.31 \n4 | AdWare.OSX.Pirrit.o | 9.32 \n5 | AdWare.OSX.Bnodlero.at | 7.43 \n6 | Trojan-Downloader.OSX.Shlayer.a | 7.22 \n7 | AdWare.OSX.Pirrit.gen | 6.41 \n8 | AdWare.OSX.Cimpli.m | 6.29 \n9 | AdWare.OSX.Bnodlero.bg | 6.13 \n10 | AdWare.OSX.Pirrit.ae | 5.96 \n11 | AdWare.OSX.Agent.gen | 5.65 \n12 | AdWare.OSX.Pirrit.aa | 5.39 \n13 | Trojan-Downloader.OSX.Agent.h | 4.49 \n14 | AdWare.OSX.Bnodlero.ay | 4.18 \n15 | AdWare.OSX.Ketin.gen | 3.56 \n16 | AdWare.OSX.Ketin.h | 3.46 \n17 | Backdoor.OSX.Agent.z | 3.45 \n18 | Trojan-Downloader.OSX.Lador.a | 3.06 \n19 | AdWare.OSX.Bnodlero.t | 2.80 \n20 | AdWare.OSX.Bnodlero.ax | 2.64 \n \n_* Unique users who encountered this malware as a percentage of all users of Kaspersky security solutions for macOS who were attacked._\n\n### Geography of threats for macOS\n\n_Geography of threats for macOS, Q3 2021 ([download](<https://media.kasperskycontenthub.com/wp-content/uploads/sites/43/2021/11/23151108/10-en-malware-report-q3-2021-pc-graphs.png>))_\n\n**Top 10 countries by share of attacked users**\n\n| **Country*** | **%**** \n---|---|--- \n1 | France | 3.05 \n2 | Spain | 2.85 \n3 | India | 2.70 \n4 | Mexico | 2.59 \n5 | Canada | 2.52 \n6 | Italy | 2.42 \n7 | United States | 2.37 \n8 | Australia | 2.23 \n9 | Brazil | 2.21 \n10 | United Kingdom | 2.12 \n \n_* Excluded from the rating are countries with relatively few users of Kaspersky security solutions for macOS (under 10,000). \n** Unique users attacked as a percentage of all users of Kaspersky security solutions for macOS in the country._\n\nIn Q3 2021, France took the lead having the greatest percentage of attacks on users of Kaspersky security solutions (3.05%), with the potentially unwanted software Monitor.OSX.HistGrabber being the prevalent threat there. Spain and India came in second and third, with the Pirrit family adware as their prevalent threat.\n\n## IoT attacks\n\n### IoT threat statistics\n\nIn Q3 2021, most of the devices that attacked Kaspersky honeypots did so using the Telnet protocol. Just less than a quarter of all devices attempted brute-forcing our traps via SSH.\n\nTelnet | 76.55% \n---|--- \nSSH | 23.45% \n \n_Distribution of attacked services by number of unique IP addresses of devices that carried out attacks, Q3 2021_\n\nThe statistics for working sessions with Kaspersky honeypots show similar Telnet dominance.\n\nTelnet | 84.29% \n---|--- \nSSH | 15.71% \n \n_Distribution of cybercriminal working sessions with Kaspersky traps, Q3 2021_\n\n**Top 10 threats delivered to IoT devices via Telnet**\n\n| **Verdict** | **%*** \n---|---|--- \n1 | Backdoor.Linux.Mirai.b | 39.48 \n2 | Trojan-Downloader.Linux.NyaDrop.b | 20.67 \n3 | Backdoor.Linux.Agent.bc | 10.00 \n4 | Backdoor.Linux.Mirai.ba | 8.65 \n5 | Trojan-Downloader.Shell.Agent.p | 3.50 \n6 | Backdoor.Linux.Gafgyt.a | 2.52 \n7 | RiskTool.Linux.BitCoinMiner.b | 1.69 \n8 | Backdoor.Linux.Ssh.a | 1.23 \n9 | Backdoor.Linux.Mirai.ad | 1.20 \n10 | HackTool.Linux.Sshbru.s | 1.12 \n \n_* Share of each threat delivered to infected devices as a result of a successful Telnet attack out of the total number of delivered threats._\n\nDetailed IoT threat statistics are published in our Q3 2021 DDoS report: <https://securelist.com/ddos-attacks-in-q3-2021/104796/#attacks-on-iot-honeypots>\n\n## Attacks via web resources\n\n_The statistics in this section are based on Web Anti-Virus, which protects users when malicious objects are downloaded from malicious/infected web pages. Cybercriminals create such sites on purpose and web resources with user-created content (for example, forums), as well as hacked legitimate resources, can be infected._\n\n### Countries that serve as sources of web-based attacks: Top 10\n\n_The following statistics show the distribution by country of the sources of Internet attacks blocked by Kaspersky products on user computers (web pages with redirects to exploits, sites hosting malicious programs, botnet C&amp;C centers, etc.). Any unique host could be the source of one or more web-based attacks._\n\n_To determine the geographic source of web attacks, the GeoIP technique was used to match the domain name to the real IP address at which the domain is hosted._\n\nIn Q3 2021, Kaspersky solutions blocked 1,098,968,315 attacks launched from online resources located across the globe. Web Anti-Virus recognized 289,196,912 unique URLs as malicious.\n\n_Distribution of web-attack sources by country, Q3 2021 ([download](<https://media.kasperskycontenthub.com/wp-content/uploads/sites/43/2021/11/23151328/13-en-malware-report-q3-2021-pc-graphs-1.png>))_\n\n### Countries where users faced the greatest risk of online infection\n\nTo assess the risk of online infection faced by users in different countries, for each country we calculated the percentage of Kaspersky users on whose computers Web Anti-Virus was triggered during the quarter. The resulting data provides an indication of the aggressiveness of the environment in which computers operate in different countries.\n\nThis rating only includes attacks by malicious programs that fall under the **Malware class**; it does not include Web Anti-Virus detections of potentially dangerous or unwanted programs such as RiskTool or adware.\n\n| **Country*** | **% of attacked users**** \n---|---|--- \n1 | Tunisia | 27.15 \n2 | Syria | 17.19 \n3 | Yemen | 17.05 \n4 | Nepal | 15.27 \n5 | Algeria | 15.27 \n6 | Macao | 14.83 \n7 | Belarus | 14.50 \n8 | Moldova | 13.91 \n9 | Madagascar | 13.80 \n10 | Serbia | 13.48 \n11 | Libya | 13.13 \n12 | Mauritania | 13.06 \n13 | Mongolia | 13.06 \n14 | India | 12.89 \n15 | Palestine | 12.79 \n16 | Sri Lanka | 12.76 \n17 | Ukraine | 12.39 \n18 | Estonia | 11.61 \n19 | Tajikistan | 11.44 \n20 | Qatar | 11.14 \n \n_* Excluded are countries with relatively few Kaspersky users (under 10,000). \n** Unique users targeted by **Malware-class** attacks as a percentage of all unique users of Kaspersky products in the country._\n\n_These statistics are based on detection verdicts by the Web Anti-Virus module that were received from users of Kaspersky products who consented to provide statistical data._\n\nOn average during the quarter, 8.72% of computers of Internet users worldwide were subjected to at least one **Malware-class** web attack.\n\n_Geography of web-based malware attacks, Q3 2021 ([download](<https://media.kasperskycontenthub.com/wp-content/uploads/sites/43/2021/11/23151358/14-en-malware-report-q3-2021-pc-graphs.png>))_\n\n## Local threats\n\n_In this section, we analyze statistical data obtained from the OAS and ODS modules in Kaspersky products. It takes into account malicious programs that were found directly on users&#x27; computers or removable media connected to them (flash drives, camera memory cards, phones, external hard drives), or which initially made their way onto the computer in non-open form (for example, programs in complex installers, encrypted files, etc.)._\n\nIn Q3 2021, our File Anti-Virus detected **62,577,326** malicious and potentially unwanted objects.\n\n### Countries where users faced the highest risk of local infection\n\nFor each country, we calculated the percentage of Kaspersky product users on whose computers File Anti-Virus was triggered during the reporting period. These statistics reflect the level of personal computer infection in different countries.\n\nNote that this rating only includes attacks by malicious programs that fall under the **Malware class**; it does not include File Anti-Virus triggers in response to potentially dangerous or unwanted programs, such as RiskTool or adware.\n\n| **Country*** | **% of attacked users**** \n---|---|--- \n1 | Turkmenistan | 47.42 \n2 | Yemen | 44.27 \n3 | Ethiopia | 42.57 \n4 | Tajikistan | 42.51 \n5 | Uzbekistan | 40.41 \n6 | South Sudan | 40.15 \n7 | Afghanistan | 40.07 \n8 | Cuba | 38.20 \n9 | Bangladesh | 36.49 \n10 | Myanmar | 35.96 \n11 | Venezuela | 35.20 \n12 | China | 35.16 \n13 | Syria | 34.64 \n14 | Madagascar | 33.49 \n15 | Rwanda | 33.06 \n16 | Sudan | 33.01 \n17 | Benin | 32.68 \n18 | Burundi | 31.88 \n19 | Laos | 31.70 \n20 | Cameroon | 31.28 \n \n_* Excluded are countries with relatively few Kaspersky users (under 10,000). \n** Unique users on whose computers **Malware-class** local threats were blocked, as a percentage of all unique users of Kaspersky products in the country._\n\n_Geography of local infection attempts, Q3 2021 ([download](<https://media.kasperskycontenthub.com/wp-content/uploads/sites/43/2021/11/23151433/15-en-malware-report-q3-2021-pc-graphs.png>))_\n\nOn average worldwide, **Malware-class** local threats were recorded on 15.14% of users&#x27; computers at least once during the quarter. Russia scored 14.64% in this rating.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 9.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 5.9}, "published": "2021-11-26T12:00:36", "type": "securelist", "title": "IT threat evolution in Q3 2021. PC statistics", "bulletinFamily": "blog", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 10.0, "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 10.0, "obtainUserPrivilege": false}, "cvelist": ["CVE-2017-11882", "CVE-2017-8570", "CVE-2018-0802", "CVE-2019-7481", "CVE-2021-1640", "CVE-2021-1675", "CVE-2021-22937", "CVE-2021-26084", "CVE-2021-26878", "CVE-2021-30563", "CVE-2021-30632", "CVE-2021-30633", "CVE-2021-31195", "CVE-2021-31196", "CVE-2021-31207", "CVE-2021-33766", "CVE-2021-34473", "CVE-2021-34483", "CVE-2021-34523", "CVE-2021-34527", "CVE-2021-36934", "CVE-2021-36936", "CVE-2021-36947", "CVE-2021-36958", "CVE-2021-40444"], "modified": "2021-11-26T12:00:36", "id": "SECURELIST:C540EBB7FD8B7FB9E54E119E88DB5C48", "href": "https://securelist.com/it-threat-evolution-in-q3-2021-pc-statistics/104982/", "cvss": {"score": 10.0, "vector": "AV:N/AC:L/Au:N/C:C/I:C/A:C"}}], "krebs": [{"lastseen": "2021-08-21T10:08:03", "description": "**Microsoft** today released software updates to plug at least 44 security vulnerabilities in its **Windows** operating systems and related products. The software giant warned that attackers already are pouncing on one of the flaws, which ironically enough involves an easy-to-exploit bug in the software component responsible for patching **Windows 10** PCs and **Windows Server 2019** machines.\n\n\n\nMicrosoft said attackers have seized upon [CVE-2021-36948](<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-36948>), which is a weakness in the **Windows Update Medic** service. Update Medic is a new service that lets users repair Windows Update components from a damaged state so that the device can continue to receive updates.\n\nRedmond says while CVE-2021-36948 is being actively exploited, it is not aware of exploit code publicly available. The flaw is an &quot;elevation of privilege&quot; vulnerability that affects Windows 10 and **Windows Server 2019**, meaning it can be leveraged in combination with another vulnerability to let attackers run code of their choice as administrator on a vulnerable system.\n\n&quot;CVE-2021-36948 is a privilege escalation vulnerability - the cornerstone of modern intrusions as they allow attackers the level of access to do things like hide their tracks and create user accounts,&quot; said **Kevin Breen** of [Immersive Labs](<https://www.immersivelabs.com>). &quot;In the case of ransomware attacks, they have also been used to ensure maximum damage.&quot;\n\nAccording to Microsoft, critical flaws are those that can be exploited remotely by malware or malcontents to take complete control over a vulnerable Windows computer -- and with little to no help from users. Top of the heap again this month: Microsoft also took another stab at fixing a broad class of weaknesses in its printing software.\n\nLast month, the company rushed out an emergency update to patch &quot;[PrintNightmare](<https://krebsonsecurity.com/2021/07/microsoft-issues-emergency-patch-for-windows-flaw/>)&quot; -- a critical hole in its Windows Print Spooler software that was being attacked in the wild. Since then, a number of researchers have discovered holes in that patch, allowing them to circumvent its protections.\n\nToday&#x27;s Patch Tuesday fixes another critical Print Spooler flaw ([CVE-2021-36936](<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-36936>)), but it&#x27;s not clear if this bug is a variant of PrintNightmare or a unique vulnerability all on its own, said **Dustin Childs** at **Trend Micro&#x27;s Zero Day Initiative**.\n\n&quot;Microsoft does state low privileges are required, so that should put this in the non-wormable category, but you should still prioritize testing and deployment of this Critical-rated bug,&quot; Childs said.\n\nMicrosoft said the Print Spooler patch it is pushing today should address all publicly documented security problems with the service.\n\n&quot;Today we are addressing this risk by changing the default Point and Print driver installation and update behavior to require administrator privileges,&quot; Microsoft said in a blog post. &quot;This change may impact Windows print clients in scenarios where non-elevated users were previously able to add or update printers. However, we strongly believe that the security risk justifies the change. This change will take effect with the installation of the security updates released on August 10, 2021 for all versions of Windows, and is documented as [CVE-2021-34481](<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-34481>).&quot;\n\nAugust brings yet another critical patch ([CVE-2021-34535](<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-34535>)) for the **Windows Remote Desktop** service, and this time the flaw is in the Remote Desktop client instead of the server.\n\n[CVE-2021-26424](<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-26424>) -- a scary, critical bug in the **Windows TCP/IP** component -- earned a CVSS score of 9.9 (10 is the worst), and is present in **Windows 7** through **Windows 10**, and Windows Server 2008 through 2019 (Windows 7 is no longer being supported with security updates).\n\nMicrosoft said it was not aware of anyone exploiting this bug yet, although the company assigned it the label &quot;exploitation more likely,&quot; meaning it may not be difficult for attackers to figure out. CVE-2021-26424 could be exploited by sending a single malicious data packet to a vulnerable system.\n\nFor a complete rundown of all patches released today and indexed by severity, check out the [always-useful Patch Tuesday roundup](<https://isc.sans.edu/forums/diary/Microsoft+August+2021+Patch+Tuesday/27736/>) from the **SANS Internet Storm Center**. And it&#x27;s not a bad idea to hold off updating for a few days until Microsoft works out any kinks in the updates: [AskWoody.com](<https://www.askwoody.com/2021/defcon-2-august-updates-include-print-spooler-fixes/>) usually has the lowdown on any patches that are causing problems for Windows users.\n\nOn that note, before you update _please_ make sure you have backed up your system and/or important files. It\u2019s not uncommon for a Windows update package to hose one\u2019s system or prevent it from booting properly, and some updates have been known to erase or corrupt files.\n\nSo do yourself a favor and backup before installing any patches. Windows 10 even has some [built-in tools](<https://lifehacker.com/how-to-back-up-your-computer-automatically-with-windows-1762867473>) to help you do that, either on a per-file/folder basis or by making a complete and bootable copy of your hard drive all at once.\n\nAnd if you wish to ensure Windows has been set to pause updating so you can back up your files and/or system before the operating system decides to reboot and install patches on its own schedule, [see this guide](<https://www.computerworld.com/article/3543189/check-to-make-sure-you-have-windows-updates-paused.html>).\n\nIf you experience glitches or problems installing any of these patches this month, please consider leaving a comment about it below; there\u2019s a decent chance other readers have experienced the same and may chime in here with useful tips.", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 7.8, "privilegesRequired": "LOW", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 5.9}, "published": "2021-08-10T21:12:58", "type": "krebs", "title": "Microsoft Patch Tuesday, August 2021 Edition", "bulletinFamily": "blog", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 3.9, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 4.6, "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-26424", "CVE-2021-34481", "CVE-2021-34535", "CVE-2021-36936", "CVE-2021-36948"], "modified": "2021-08-10T21:12:58", "id": "KREBS:AE87E964E683A56CFE4E51E96F3530AD", "href": "https://krebsonsecurity.com/2021/08/microsoft-patch-tuesday-august-2021-edition/", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "hivepro": [{"lastseen": "2021-08-23T15:19:10", "description": "#### THREAT LEVEL: Red.\n\nFor a detailed advisory, [download the pdf file here.](<https://www.hivepro.com/wp-content/uploads/2021/08/TA202129.pdf>)\n\nMultiple vulnerabilities have been patched by Microsoft in August 2021 Patch Tuesday. Three of them have been labeled as zero-day vulnerabilities (CVE-2021-36936, CVE-2021-36942, and CVE-2021-36948). One of them (CVE-2021-36948) has already been exploited in the wild. The attacker is yet to be identified. Microsoft has classified six vulnerabilities as critical, and patches for all of them are now available.\n\n#### Vulnerability Details\n\n \n\n#### Patch Links\n\n<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-36948>\n\n<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-34530>\n\n<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-34534>\n\n<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-36936>\n\n<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-26432>\n\n<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-34480>\n\n<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-34535>\n\n<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-26424>\n\n<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-36942>\n\n#### References\n\n<https://www.bleepingcomputer.com/news/microsoft/microsoft-august-2021-patch-tuesday-fixes-3-zero-days-44-flaws/>", "cvss3": {}, "published": "2021-08-11T13:25:48", "type": "hivepro", "title": "Critical Vulnerabilities revealed in Microsoft\u2019s Patch Tuesday", "bulletinFamily": "info", "cvss2": {}, "cvelist": ["CVE-2021-26424", "CVE-2021-26432", "CVE-2021-34480", "CVE-2021-34530", "CVE-2021-34534", "CVE-2021-34535", "CVE-2021-36936", "CVE-2021-36942", "CVE-2021-36948"], "modified": "2021-08-11T13:25:48", "id": "HIVEPRO:1BBAC0CD5F3681EC49D06BE85DC90A92", "href": "https://www.hivepro.com/critical-vulnerabilities-revealed-in-microsofts-patch-tuesday/", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "qualysblog": [{"lastseen": "2021-08-21T10:10:11", "description": "### Microsoft Patch Tuesday \u2013 August 2021\n\nMicrosoft patched 51 vulnerabilities in their August 2021 Patch Tuesday release, and 7 of them are rated as critical severity. Three 0-day vulnerability patches were included in the release.\n\n#### Critical Microsoft Vulnerabilities Patched\n\n[CVE-2021-36942](<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-36942>) - Windows LSA Spoofing Vulnerability\n\nAn unauthenticated attacker could call a method on the LSARPC interface and coerce the domain controller to authenticate against another server using NTLM. A malicious user can use this attack to take complete control over windows domain Per Microsoft, this vulnerability affects all servers, but domain controllers should be prioritized in terms of applying security updates.\n\n[CVE-2021-34481](<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-34481>) \u2013 Windows Print Spooler Remote Code Execution Vulnerability\n\nA remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. This Patch Tuesday Microsoft released security updates to address this vulnerability and should be prioritized.\n\n#### Three 0-Day Vulnerabilities Patched\n\n * [CVE-2021-36936](<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-36936>) - Windows Print Spooler Remote Code Execution Vulnerability\n * [CVE-2021-36942](<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-36942>) - Windows LSA Spoofing Vulnerability\n * [CVE-2021-36948](<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-36948>) - Windows Update Medic Service Elevation of Privilege Vulnerability - This has been actively exploited, per Microsoft.\n\n#### Qualys QIDs Providing Coverage\n\n**QID**| **Title**| **Severity**| **CVE ID** \n---|---|---|--- \n110388| Microsoft SharePoint Enterprise Server Multiple Vulnerabilities August 2021| Medium| [_CVE-2021-36940_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36940>) \n110389| Microsoft Office and Microsoft Office Services and Web Apps Security Update August 2021 | High| [_CVE-2021-34478_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34478>), [_CVE-2021-36941_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36941>) \n375798| Microsoft Azure CycleCloud Elevation of Privilege Vulnerability August 2021 | Medium| [_CVE-2021-33762_](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-33762>), [_CVE-2021-36943_](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36943>), [_KB3142345_](<https://www.microsoft.com/en-us/download/details.aspx?id=103313>) \n91801| Microsoft Dynamics Business Central Cross-Site (XSS) Scripting Vulnerability August 2021 | Medium | [_CVE-2021-36946_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36946>) \n91802| Microsoft Windows Security Update for August 2021 \n \n | High| CVE-2021-26424, [_CVE-2021-26425_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26425>), [_CVE-2021-26426_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26426>), [_CVE-2021-26431_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26431>), [_CVE-2021-26432_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26432>), [_CVE-2021-26433_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26433>), [_CVE-2021-34480_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34480>), [_CVE-2021-34483_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34483>), [_CVE-2021-34484_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34484>), [_CVE-2021-34486_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34486>), [_CVE-2021-34487_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34487>), [_CVE-2021-34530_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34530>), [_CVE-2021-34533_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34533>), [_CVE-2021-34534_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34534>), [_CVE-2021-34535_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34535>), [_CVE-2021-34536_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34536>), [_CVE-2021-34537_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34537>), [_CVE-2021-36926_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36926>), [_CVE-2021-36927_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36927>), [_CVE-2021-36932_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36932>), [_CVE-2021-36933_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36933>), [_CVE-2021-36936_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36936>), [_CVE-2021-36937_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36937>), [_CVE-2021-36938_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36938>), [_CVE-2021-36947_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36947>), [_CVE-2021-36948_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36948>) \n91803| Microsoft Windows Local Security Authority (LSA) Spoofing Vulnerability August 2021 | High| [_CVE-2021-36942_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36942>) \n91804| Microsoft Windows Defender Elevation of Privilege Vulnerability August 2021 | Medium| [_CVE-2021-34471_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34471>) \n91805| Microsoft Windows 10 Update Assistant Elevation of Privilege Vulnerability August 2021 | Medium | [_CVE-2021-36945_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36945>) \n91806| Microsoft Azure Active Directory Connect Authentication Bypass Vulnerability August 2021 | Medium| [_CVE-2021-36949_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36949>) \n91774| Microsoft .NET Core and ASP.NET Core Security Update for August 2021 | High| [_CVE-2021-26423_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26423>), [_CVE-2021-34485_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34485>), [_CVE-2021-34532_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34532>) \n91809| Microsoft Visual Studio Security Update for August 2021 | Medium| [_CVE-2021-26423_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26423>), [_CVE-2021-34485_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34485>), [_CVE-2021-34532_](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34532>) \n \n### Adobe Patch Tuesday \u2013 August 2021\n\nAdobe addressed 29 CVEs this Patch Tuesday impacting Adobe Connect and Magento product. The patches for Magento are labeled as [Priority 2](<https://helpx.adobe.com/security/severity-ratings.html>), while the remaining patches are set to [Priority 3](<https://helpx.adobe.com/security/severity-ratings.html>).\n\n**Adobe Security Bulletin**| **QID**| **Severity**| **CVE ID** \n---|---|---|--- \nAdobe Connect Multiple Vulnerabilities (APSB21-66) | 730152| Medium| [CVE-2021-36061](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36061>), [CVE-2021-36062](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36062>), [CVE-2021-36063](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36063>) \n \n### Discover Patch Tuesday Vulnerabilities in VMDR\n\nQualys VMDR automatically detects new Patch Tuesday vulnerabilities using continuous updates to its Knowledge Base (KB).\n\nYou can see all your impacted hosts by these vulnerabilities using the following QQL query:\n\n`vulnerabilities.vulnerability:(qid:`91774` OR qid:`91801` OR qid:`91802` OR qid:`91803` OR qid:`91804` OR qid:`91805` OR qid:`91806` OR qid:`91809` OR qid:`375798` OR qid:`110389` OR qid:`110388` OR qid:`730152`)`\n\n\n\n### Respond by Patching\n\nVMDR rapidly remediates Windows hosts by deploying the most relevant and applicable per-technology version patches. You can simply select respective QIDs in the Patch Catalog and filter on the \u201cMissing\u201d patches to identify and deploy the applicable, available patches in one go.\n\nThe following QQL will return the missing patches pertaining to this Patch Tuesday.\n\n`(qid:`91774` OR qid:`91801` OR qid:`91802` OR qid:`91803` OR qid:`91804` OR qid:`91805` OR qid:`91806` OR qid:`91809` OR qid:`375798` OR qid:`110389` OR qid:`110388` OR qid:`730152`)`\n\n\n\n### Patch Tuesday Dashboard\n\nThe current updated Patch Tuesday dashboards are available in [Dashboard Toolbox: 2021 Patch Tuesday Dashboard](<https://success.qualys.com/discussions/s/article/000006505>).\n\n### Webinar Series: This Month in Vulnerabilities and Patches\n\nTo help customers leverage the seamless integration between Qualys VMDR and Patch Management and reduce the median time to remediate critical vulnerabilities, the Qualys Research team is hosting a monthly webinar series [_This Month in Vulnerabilities and Patches_](<https://www.brighttalk.com/webcast/11673/502309>).\n\nWe discuss some of the key vulnerabilities disclosed in the past month and how to patch them:\n\n * Microsoft Patch Tuesday, August 2021\n * Adobe Patch Tuesday, August 2021\n\n[Join us live or watch on demand!](<https://www.brighttalk.com/webcast/11673/502309>)\n\n[Webinar August 12, 2021 or on demand](<https://www.brighttalk.com/webcast/11673/502309>).\n\n### About Patch Tuesday\n\nPatch Tuesday QIDs are published at [Security Alerts](<https://www.qualys.com/research/security-alerts/>), typically late in the evening of [Patch Tuesday](<https://blog.qualys.com/tag/patch-tuesday>), followed shortly after by [PT dashboards](<https://qualys-secure.force.com/discussions/s/article/000006505>).", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 7.8, "privilegesRequired": "LOW", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 5.9}, "published": "2021-08-10T19:58:49", "type": "qualysblog", "title": "Microsoft and Adobe Patch Tuesday (August 2021) \u2013 Microsoft 51 Vulnerabilities with 7 Critical, Adobe 29 Vulnerabilities", "bulletinFamily": "blog", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 3.9, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 4.6, "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-26423", "CVE-2021-26424", "CVE-2021-26425", "CVE-2021-26426", "CVE-2021-26431", "CVE-2021-26432", "CVE-2021-26433", "CVE-2021-33762", "CVE-2021-34471", "CVE-2021-34478", "CVE-2021-34480", "CVE-2021-34481", "CVE-2021-34483", "CVE-2021-34484", "CVE-2021-34485", "CVE-2021-34486", "CVE-2021-34487", "CVE-2021-34530", "CVE-2021-34532", "CVE-2021-34533", "CVE-2021-34534", "CVE-2021-34535", "CVE-2021-34536", "CVE-2021-34537", "CVE-2021-36061", "CVE-2021-36062", "CVE-2021-36063", "CVE-2021-36926", "CVE-2021-36927", "CVE-2021-36932", "CVE-2021-36933", "CVE-2021-36936", "CVE-2021-36937", "CVE-2021-36938", "CVE-2021-36940", "CVE-2021-36941", "CVE-2021-36942", "CVE-2021-36943", "CVE-2021-36945", "CVE-2021-36946", "CVE-2021-36947", "CVE-2021-36948", "CVE-2021-36949"], "modified": "2021-08-10T19:58:49", "id": "QUALYSBLOG:0F0ACCA731E84F3B1067935E483FC950", "href": "https://blog.qualys.com/category/vulnerabilities-threat-research", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2021-09-16T10:35:06", "description": "### Microsoft Patch Tuesday \u2013 September 2021\n\nMicrosoft patched 60 vulnerabilities in their September 2021 Patch Tuesday release, and an additional 26 CVEs since September 1st. Among the 60 released in the September Patch Tuesday, 3 of them are rated as critical severity, one as moderate, and 56 as important.\n\n#### Critical Microsoft Vulnerabilities Patched\n\n[CVE-2021-40444](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40444>) - Microsoft MSHTML Remote Code Execution Vulnerability \n\nThis vulnerability has been publicly disclosed and is known to be exploited. The vulnerability allows for remote code execution via MSHTML, a component used by Internet Explorer and Office. Microsoft also released a workaround to show how users can disable ActiveX controls in IE. The vendor has assigned a CVSSv3 base score of 8.8. It should be prioritized for patching.\n\n[CVE-2021-26435](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26435>) - Windows Scripting Engine Memory Corruption Vulnerability \n\nMicrosoft released patches addressing a critical remote code execution vulnerability in Windows Scripting Engine. The exploitation of this vulnerability requires an attacker to convince users to click a link and then open a specially-crafted file. The vendor has assigned a CVSSv3 base score of 8.8. It should be prioritized for patching. \n\n[CVE-2021-36965](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36965>) - Windows WLAN AutoConfig Service Remote Code Execution Vulnerability \n\nThis vulnerability does not allow user interaction and also has a low complexity for attack. The vendor has assigned a CVSSv3 base score of 8.8. It should be prioritized for patching.\n\n[CVE-2021-38633](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38633>), [CVE-2021-36963](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36963>) - Windows Common Log File System Driver Elevation of Privilege Vulnerability \n\nThe vulnerabilities allow an attacker to gain elevated privileges to make changes to the victim\u2019s system. These CVEs have a high likelihood of exploitability and is assigned a CVSSv3 base score of 7.8 by the vendor. It should be prioritized for patching. \n\n[CVE-2021-38671](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38671>) - Windows Print Spooler Elevation of Privilege Vulnerability\n\nThis CVE has a high likelihood of exploitability and is assigned a CVSSv3 base score of 7.8 by the vendor. It should be prioritized for patching.\n\n### Qualys QIDs Providing Coverage\n\n**QID**| **Title**| **Severity**| **CVE ID** \n---|---|---|--- \n375861| Microsoft Edge Based On Chromium Prior to 93.0.961.47 Multiple Vulnerabilities| High| _CVE-2021-30632_ \n110390| Microsoft Office and Microsoft Office Services and Web Apps Security Update September 2021| High| _CVE-2021-38655,CVE-2021-38650,CVE-2021-38654,CVE-2021-38653,CVE-2021-38658,CVE-2021-38646,CVE-2021-38660,CVE-2021-38657,CVE-2021-38656,CVE-2021-38659_ \n110391| Microsoft SharePoint Enterprise Server Multiple Vulnerabilities September 2021| Medium| _CVE-2021-38651,CVE-2021-38652_ \n375860| Azure Open Management Infrastructure Multiple Vulnerabilities| Medium | CVE-2021-38645 CVE-2021-38647 CVE-2021-38648 CVE-2021-38649 \n \n91821| \nMicrosoft Cumulative Security Update for Internet Explorer (KB5005563) \n| Medium| _KB5005563 _ \n375854| Visual Studio Code Spoofing Vulnerability | Medium| _CVE-2021-26437 _ \n45505| Microsoft MSHTML Remote Code Execution Vulnerability Active X Controls Disabled (Mitigation for CVE-2021-40444 Enabled)| Low| \n91815| Microsoft Visual Studio Security Update for September 2021 | Medium | _CVE-2021-26434 CVE-2021-36952 _ \n91816| Microsoft Windows Security Update for September 2021| High| _CVE-2021-38667,CVE-2021-38639,CVE-2021-38638,CVE-2021-38637,CVE-2021-26435,CVE-2021-40447,CVE-2021-38671,CVE-2021-36965,CVE-2021-36967,CVE-2021-36974,CVE-2021-36972,CVE-2021-36966,CVE-2021-36969,CVE-2021-36973,CVE-2021-36962,CVE-2021-36961,CVE-2021-36964,CVE-2021-36963,CVE-2021-36959,CVE-2021-36968,CVE-2021-36975,CVE-2021-38636,CVE-2021-38635,CVE-2021-38633,CVE-2021-38629,CVE-2021-38628,CVE-2021-38634,CVE-2021-38632,CVE-2021-38630,CVE-2021-38624,CVE-2021-36955,CVE-2021-36954,CVE-2021-36960,CVE-2021-36958_ \n91817| Microsoft Dynamics Business Central Cross-Site Scripting (XSS) Vulnerability September 2021| Medium| _CVE-2021-40440_ \n91818| Microsoft Windows Kernel Elevation of Privilege Vulnerability September 2021| High| _CVE-2021-38625,CVE-2021-38626_ \n91819| Microsoft Windows Codecs Library HEVC Video Extensions Remote Code Execution (RCE) Vulnerability - September 2021| High| _CVE-2021-38661 _ \n91820| Microsoft MPEG-2 Video Extension Remote Code Execution (RCE) Vulnerability| High| _CVE-2021-38644 _ \n \n### Adobe Patch Tuesday \u2013 September 2021\n\nAdobe addressed [61 CVEs](<https://helpx.adobe.com/security.html>) this Patch Tuesday impacting Adobe Acrobat and Reader, ColdFusion, Premiere Pro, Adobe InCopy, Adobe SVG-Native Viewer, InDesign, Framemaker, Creative Cloud Desktop Apps, Photoshop Elements, Premiere Elements, Digital Editions, Genuine Service, Photoshop, XMP Toolit SDK and Experience Manager.\n\nThe patches for Adobe Acrobat and Reader, ColdFusion and Experience Manager are labeled as [Priority 2](<https://helpx.adobe.com/security/severity-ratings.html>), while the remaining patches are labeled as [Priority 3](<https://helpx.adobe.com/security/severity-ratings.html>). \n\n**Adobe Security Bulletin**| **QID**| **Severity**| **CVE ID** \n---|---|---|--- \nAdobe Security Update for Adobe Acrobat and Adobe Reader (APSB21-55) | 375845| Medium| _CVE-2021-39841, CVE-2021-39863, CVE-2021-39857, CVE-2021-39856, CVE-2021-39855, CVE-2021-39844, CVE-2021-39861, CVE-2021-39858, CVE-2021-39843, CVE-2021-39846, CVE-2021-39845, CVE-2021-35982, CVE-2021-39859, CVE-2021-39840, CVE-2021-39842, CVE-2021-39839, CVE-2021-39838,CVE-2021-39837,CVE-2021-39836,CVE-2021-39860,CVE-2021-39852,CVE-2021-39854,CVE-2021-39853,CVE-2021-39850,CVE-2021-39849,CVE-2021-39851_ \n \n### Discover Patch Tuesday Vulnerabilities in VMDR\n\nQualys VMDR automatically detects new Patch Tuesday vulnerabilities using continuous updates to its Knowledge Base (KB).\n\nYou can see all your impacted hosts by these vulnerabilities using the following QQL query:\n\n`vulnerabilities.vulnerability:(qid:`375861` OR qid:`110390` OR qid:`110391` OR qid:`375860` OR qid:`91821` OR qid:`375854` OR qid:`45505` OR qid:`91815` OR qid:`91816` OR qid:`91817` OR qid:`91818` OR qid:`91819` OR qid:`91820`)`\n\n\n\n### Respond by Patching\n\nVMDR rapidly remediates Windows hosts by deploying the most relevant and applicable per-technology version patches. You can simply select respective QIDs in the Patch Catalog and filter on the \u201cMissing\u201d patches to identify and deploy the applicable, available patches in one go.\n\nThe following QQL will return the missing patches pertaining to this Patch Tuesday.\n\n`(qid:`375861` OR qid:`110390` OR qid:`110391` OR qid:`375860` OR qid:`91821` OR qid:`375854` OR qid:`45505` OR qid:`91815` OR qid:`91816` OR qid:`91817` OR qid:`91818` OR qid:`91819` OR qid:`91820`)`\n\n\n\n### Patch Tuesday Dashboard\n\nThe current updated Patch Tuesday dashboards are available in [Dashboard Toolbox: 2021 Patch Tuesday Dashboard](<https://success.qualys.com/discussions/s/article/000006505>).\n\n### Webinar Series: This Month in Vulnerabilities and Patches\n\nTo help customers leverage the seamless integration between Qualys VMDR and Patch Management and reduce the median time to remediate critical vulnerabilities, the Qualys Research team is hosting a monthly webinar series [_T_](<https://event.on24.com/wcc/r/3411753/DC43289F29EF66CAE5CF62637F8CB6E3>)_[his Month in Vulnerabilities and Patches](<https://event.on24.com/wcc/r/3411753/DC43289F29EF66CAE5CF62637F8CB6E3>)_.\n\nWe discuss some of the key vulnerabilities disclosed in the past month and how to patch them: \n\n * Microsoft Patch Tuesday, September 2021 \n * Adobe Patch Tuesday, September 2021 \n\n[Join us live or watch on demand!](<https://event.on24.com/wcc/r/3411753/DC43289F29EF66CAE5CF62637F8CB6E3>)\n\nThursday, September 16, 2021 or later on demand\n\n### About Patch Tuesday\n\nPatch Tuesday QIDs are published at [Security Alerts](<https://www.qualys.com/research/security-alerts/>), typically late in the evening of [Patch Tuesday](<https://blog.qualys.com/tag/patch-tuesday>), followed shortly after by [PT dashboards](<https://qualys-secure.force.com/discussions/s/article/000006505>).", "cvss3": {}, "published": "2021-09-14T18:56:17", "type": "qualysblog", "title": "Microsoft and Adobe Patch Tuesday (September 2021) \u2013 Microsoft 60 Vulnerabilities with 3 Critical, Adobe 61 Vulnerabilities", "bulletinFamily": "blog", "cvss2": {}, "cvelist": ["CVE-2021-26434", "CVE-2021-26435", "CVE-2021-26437", "CVE-2021-30632", "CVE-2021-35982", "CVE-2021-36952", "CVE-2021-36954", "CVE-2021-36955", "CVE-2021-36958", "CVE-2021-36959", "CVE-2021-36960", "CVE-2021-36961", "CVE-2021-36962", "CVE-2021-36963", "CVE-2021-36964", "CVE-2021-36965", "CVE-2021-36966", "CVE-2021-36967", "CVE-2021-36968", "CVE-2021-36969", "CVE-2021-36972", "CVE-2021-36973", "CVE-2021-36974", "CVE-2021-36975", "CVE-2021-38624", "CVE-2021-38625", "CVE-2021-38626", "CVE-2021-38628", "CVE-2021-38629", "CVE-2021-38630", "CVE-2021-38632", "CVE-2021-38633", "CVE-2021-38634", "CVE-2021-38635", "CVE-2021-38636", "CVE-2021-38637", "CVE-2021-38638", "CVE-2021-38639", "CVE-2021-38644", "CVE-2021-38645", "CVE-2021-38646", "CVE-2021-38647", "CVE-2021-38648", "CVE-2021-38649", "CVE-2021-38650", "CVE-2021-38651", "CVE-2021-38652", "CVE-2021-38653", "CVE-2021-38654", "CVE-2021-38655", "CVE-2021-38656", "CVE-2021-38657", "CVE-2021-38658", "CVE-2021-38659", "CVE-2021-38660", "CVE-2021-38661", "CVE-2021-38667", "CVE-2021-38671", "CVE-2021-39836", "CVE-2021-39837", "CVE-2021-39838", "CVE-2021-39839", "CVE-2021-39840", "CVE-2021-39841", "CVE-2021-39842", "CVE-2021-39843", "CVE-2021-39844", "CVE-2021-39845", "CVE-2021-39846", "CVE-2021-39849", "CVE-2021-39850", "CVE-2021-39851", "CVE-2021-39852", "CVE-2021-39853", "CVE-2021-39854", "CVE-2021-39855", "CVE-2021-39856", "CVE-2021-39857", "CVE-2021-39858", "CVE-2021-39859", "CVE-2021-39860", "CVE-2021-39861", "CVE-2021-39863", "CVE-2021-40440", "CVE-2021-40444", "CVE-2021-40447"], "modified": "2021-09-14T18:56:17", "id": "QUALYSBLOG:5576D16DC39617927D8AEFF027CC0911", "href": "https://blog.qualys.com/category/vulnerabilities-threat-research", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}], "rapid7blog": [{"lastseen": "2021-08-21T10:49:33", "description": "\n\nHot off the press, it\u2019s another issue of the Patch Tuesday blog! While the number of vulnerabilities is low this month, there are a number of high risk items administrators will want to patch right away including a few that will require additional remediation steps. This Patch Tuesday also includes updates for three vulnerabilities that were publicly disclosed earlier this month. Let\u2019s jump in.\n\n## Windows Elevation of Privilege Vulnerability aka HiveNightmare/SeriousSAM\n\n<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36934> \nWith a public proof-of-concept having been available for some time, administrators should prioritize taking action on CVE-2021-36934. Remediation for this vulnerability requires volume shadow copies for system files to be deleted. This is due to the nature of the vulnerability, as the files with the vulnerable permissions could be restored from a backup and accessed even after the patch is installed. Microsoft indicates they took caution not to delete users' backups, but the trade-off is that customers will need to do the chore themselves. We've updated [our blog post](<https://www.rapid7.com/blog/post/2021/07/21/microsoft-sam-file-readability-cve-2021-36934-what-you-need-to-know/>) with this additional information.\n\n## Windows LSA Spoofing Vulnerability aka ADV210003\n\n<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36942> \nAnother high priority action for patching teams is CVE-2021-36942. This update patches one of the vectors used in the PetitPotam attack. After applying this update there are additional configurations required in order to protect systems from other attack vectors using registry keys. The InsightVM team has included detection for the registry keys needed to enable EPA and SMB Signing in addition to the normal update. Please see [our blog post](<https://www.rapid7.com/blog/post/2021/08/03/petitpotam-novel-attack-chain-can-fully-compromise-windows-domains-running-ad-cs/>) for more information.\n\n## Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability\n\n<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-26432> \nWhile Microsoft has not offered up any details for this vulnerability we can glean some info from the CVSS information. This remote code execution vulnerability is reachable from the network service with no authentication or user action required. There may not be an exploit available for this yet, but Microsoft indicates that \u201cExploitation [is] more likely\u201d. Put this update near the top of your TODO list.\n\n## Windows TCP/IP Remote Code Execution Vulnerability\n\n<https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-26424> \nLast on our list is a vulnerability that can result in remote execution on a Hyper-V host via the IPv6 networking stack. If Hyper-V is used in your environment this should be first on your list this month. \n\n## Summary Graphs\n\n\n\n## Summary Tables\n\n## Azure Vulnerabilities\n\nCVE | Title | Exploited | Disclosed | CVSS3 | FAQ \n---|---|---|---|---|--- \n[CVE-2021-36949](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36949>) | Microsoft Azure Active Directory Connect Authentication Bypass Vulnerability | No | No | 7.1 | Yes \n[CVE-2021-26428](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26428>) | Azure Sphere Information Disclosure Vulnerability | No | No | 4.4 | Yes \n[CVE-2021-26429](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26429>) | Azure Sphere Elevation of Privilege Vulnerability | No | No | 7.7 | Yes \n[CVE-2021-26430](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26430>) | Azure Sphere Denial of Service Vulnerability | No | No | 6 | Yes \n[CVE-2021-33762](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33762>) | Azure CycleCloud Elevation of Privilege Vulnerability | No | No | 7 | No \n[CVE-2021-36943](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36943>) | Azure CycleCloud Elevation of Privilege Vulnerability | No | No | 4 | No \n \n## Browser Vulnerabilities\n\nCVE | Title | Exploited | Disclosed | CVSS3 | FAQ \n---|---|---|---|---|--- \n[CVE-2021-30597](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-30597>) | Chromium: CVE-2021-30597 Use after free in Browser UI | No | No | | Yes \n[CVE-2021-30596](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-30596>) | Chromium: CVE-2021-30596 Incorrect security UI in Navigation | No | No | | Yes \n[CVE-2021-30594](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-30594>) | Chromium: CVE-2021-30594 Use after free in Page Info UI | No | No | | Yes \n[CVE-2021-30593](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-30593>) | Chromium: CVE-2021-30593 Out of bounds read in Tab Strip | No | No | | Yes \n[CVE-2021-30592](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-30592>) | Chromium: CVE-2021-30592 Out of bounds write in Tab Groups | No | No | | Yes \n[CVE-2021-30591](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-30591>) | Chromium: CVE-2021-30591 Use after free in File System API | No | No | | Yes \n[CVE-2021-30590](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-30590>) | Chromium: CVE-2021-30590 Heap buffer overflow in Bookmarks | No | No | | Yes \n \n## Developer Tools Vulnerabilities\n\nCVE | Title | Exploited | Disclosed | CVSS3 | FAQ \n---|---|---|---|---|--- \n[CVE-2021-34532](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34532>) | ASP.NET Core and Visual Studio Information Disclosure Vulnerability | No | No | 5.5 | Yes \n[CVE-2021-34485](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34485>) | .NET Core and Visual Studio Information Disclosure Vulnerability | No | No | 5 | Yes \n[CVE-2021-26423](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26423>) | .NET Core and Visual Studio Denial of Service Vulnerability | No | No | 7.5 | No \n \n## Microsoft Dynamics Vulnerabilities\n\nCVE | Title | Exploited | Disclosed | CVSS3 | FAQ \n---|---|---|---|---|--- \n[CVE-2021-36946](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36946>) | Microsoft Dynamics Business Central Cross-site Scripting Vulnerability | No | No | 5.4 | No \n[CVE-2021-34524](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34524>) | Microsoft Dynamics 365 (on-premises) Remote Code Execution Vulnerability | No | No | 8.1 | No \n[CVE-2021-36950](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36950>) | Microsoft Dynamics 365 (on-premises) Cross-site Scripting Vulnerability | No | No | 5.4 | No \n \n## Microsoft Office Vulnerabilities\n\nCVE | Title | Exploited | Disclosed | CVSS3 | FAQ \n---|---|---|---|---|--- \n[CVE-2021-36941](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36941>) | Microsoft Word Remote Code Execution Vulnerability | No | No | 7.8 | Yes \n[CVE-2021-36940](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36940>) | Microsoft SharePoint Server Spoofing Vulnerability | No | No | 7.6 | No \n[CVE-2021-34478](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34478>) | Microsoft Office Remote Code Execution Vulnerability | No | No | 7.8 | Yes \n \n## System Center Vulnerabilities\n\nCVE | Title | Exploited | Disclosed | CVSS3 | FAQ \n---|---|---|---|---|--- \n[CVE-2021-34471](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34471>) | Microsoft Windows Defender Elevation of Privilege Vulnerability | No | No | 7.8 | Yes \n \n## Windows Vulnerabilities\n\nCVE | Title | Exploited | Disclosed | CVSS3 | FAQ \n---|---|---|---|---|--- \n[CVE-2021-26426](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26426>) | Windows User Account Profile Picture Elevation of Privilege Vulnerability | No | No | 7 | No \n[CVE-2021-36948](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36948>) | Windows Update Medic Service Elevation of Privilege Vulnerability | Yes | No | 7.8 | No \n[CVE-2021-26432](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26432>) | Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability | No | No | 9.8 | No \n[CVE-2021-26433](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26433>) | Windows Services for NFS ONCRPC XDR Driver Information Disclosure Vulnerability | No | No | 7.5 | Yes \n[CVE-2021-36926](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36926>) | Windows Services for NFS ONCRPC XDR Driver Information Disclosure Vulnerability | No | No | 7.5 | Yes \n[CVE-2021-36932](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36932>) | Windows Services for NFS ONCRPC XDR Driver Information Disclosure Vulnerability | No | No | 7.5 | Yes \n[CVE-2021-36933](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36933>) | Windows Services for NFS ONCRPC XDR Driver Information Disclosure Vulnerability | No | No | 7.5 | Yes \n[CVE-2021-26431](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26431>) | Windows Recovery Environment Agent Elevation of Privilege Vulnerability | No | No | 7.8 | No \n[CVE-2021-34534](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34534>) | Windows MSHTML Platform Remote Code Execution Vulnerability | No | No | 6.8 | Yes \n[CVE-2021-34530](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34530>) | Windows Graphics Component Remote Code Execution Vulnerability | No | No | 7.8 | No \n[CVE-2021-34486](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34486>) | Windows Event Tracing Elevation of Privilege Vulnerability | No | No | 7.8 | No \n[CVE-2021-34487](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34487>) | Windows Event Tracing Elevation of Privilege Vulnerability | No | No | 7 | No \n[CVE-2021-36938](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36938>) | Windows Cryptographic Primitives Library Information Disclosure Vulnerability | No | No | 5.5 | No \n[CVE-2021-36945](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36945>) | Windows 10 Update Assistant Elevation of Privilege Vulnerability | No | No | 7.3 | No \n[CVE-2021-34536](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34536>) | Storage Spaces Controller Elevation of Privilege Vulnerability | No | No | 7.8 | No \n \n## Windows ESU Vulnerabilities\n\nCVE | Title | Exploited | Disclosed | CVSS3 | FAQ \n---|---|---|---|---|--- \n[CVE-2021-34484](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34484>) | Windows User Profile Service Elevation of Privilege Vulnerability | No | No | 7.8 | No \n[CVE-2021-26424](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26424>) | Windows TCP/IP Remote Code Execution Vulnerability | No | No | 9.9 | Yes \n[CVE-2021-36936](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36936>) | Windows Print Spooler Remote Code Execution Vulnerability | No | Yes | 8.8 | No \n[CVE-2021-36947](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36947>) | Windows Print Spooler Remote Code Execution Vulnerability | No | No | 8.8 | No \n[CVE-2021-34483](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34483>) | Windows Print Spooler Elevation of Privilege Vulnerability | No | No | 7.8 | No \n[CVE-2021-36937](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36937>) | Windows Media MPEG-4 Video Decoder Remote Code Execution Vulnerability | No | No | 7.8 | No \n[CVE-2021-36942](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36942>) | Windows LSA Spoofing Vulnerability | No | Yes | 7.5 | Yes \n[CVE-2021-34533](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34533>) | Windows Graphics Component Font Parsing Remote Code Execution Vulnerability | No | No | 7.8 | No \n[CVE-2021-26425](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26425>) | Windows Event Tracing Elevation of Privilege Vulnerability | No | No | 7.8 | No \n[CVE-2021-36927](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36927>) | Windows Digital TV Tuner device registration application Elevation of Privilege Vulnerability | No | No | 7.8 | No \n[CVE-2021-34537](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34537>) | Windows Bluetooth Driver Elevation of Privilege Vulnerability | No | No | 7.8 | Yes \n[CVE-2021-34480](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34480>) | Scripting Engine Memory Corruption Vulnerability | No | No | 6.8 | Yes \n[CVE-2021-34535](<https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34535>) | Remote Desktop Client Remote Code Execution Vulnerability | No | No | 8.8 | Yes", "cvss3": {}, "published": "2021-08-11T03:19:33", "type": "rapid7blog", "title": "Patch Tuesday - August 2021", "bulletinFamily": "info", "cvss2": {}, "cvelist": ["CVE-2021-26423", "CVE-2021-26424", "CVE-2021-26425", "CVE-2021-26426", "CVE-2021-26428", "CVE-2021-26429", "CVE-2021-26430", "CVE-2021-26431", "CVE-2021-26432", "CVE-2021-26433", "CVE-2021-30590", "CVE-2021-30591", "CVE-2021-30592", "CVE-2021-30593", "CVE-2021-30594", "CVE-2021-30596", "CVE-2021-30597", "CVE-2021-33762", "CVE-2021-34471", "CVE-2021-34478", "CVE-2021-34480", "CVE-2021-34483", "CVE-2021-34484", "CVE-2021-34485", "CVE-2021-34486", "CVE-2021-34487", "CVE-2021-34524", "CVE-2021-34530", "CVE-2021-34532", "CVE-2021-34533", "CVE-2021-34534", "CVE-2021-34535", "CVE-2021-34536", "CVE-2021-34537", "CVE-2021-36926", "CVE-2021-36927", "CVE-2021-36932", "CVE-2021-36933", "CVE-2021-36934", "CVE-2021-36936", "CVE-2021-36937", "CVE-2021-36938", "CVE-2021-36940", "CVE-2021-36941", "CVE-2021-36942", "CVE-2021-36943", "CVE-2021-36945", "CVE-2021-36946", "CVE-2021-36947", "CVE-2021-36948", "CVE-2021-36949", "CVE-2021-36950"], "modified": "2021-08-11T03:19:33", "id": "RAPID7BLOG:DE426F8A59CA497BB6C0B90C0F1849CD", "href": "https://blog.rapid7.com/2021/08/11/patch-tuesday-august-2021/", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2021-08-25T01:34:04", "description": "\n\n_See the `Updates` section at the end of this post for new information as it comes to light._\n\nWhether you attended virtually, IRL, or not at all, Black Hat and DEF CON have officially wrapped, and security folks\u2019 brains are replete with fresh information on new (and some not-so-new) vulnerabilities and exploit chains. The \u201chacker summer camp\u201d conferences frequently also highlight attack surface area that may _not_ be net-new \u2014 but that is subjected to renewed and redoubled community interest coming out of Vegas week. See Rapid7\u2019s summaries [here](<https://www.rapid7.com/blog/post/2021/08/05/black-hat-recap-1/>) and [here](<https://www.rapid7.com/blog/post/2021/08/06/black-hat-recap-2/>).\n\nHere\u2019s the specific attack surface area and a few of the exploit chains we\u2019re keeping our eye on right now:\n\n * Orange Tsai stole the show (as always) at Black Hat with a talk on fresh **Microsoft Exchange** attack surface area. All in all, Orange discussed CVEs from [what appears to be four separate attack chains](<https://blog.orange.tw/2021/08/proxylogon-a-new-attack-surface-on-ms-exchange-part-1.html>) \u2014including the ProxyLogon exploit chain that made headlines when it hit exposed Exchange servers as a zero-day attack [back in March](<https://www.rapid7.com/blog/post/2021/03/03/mass-exploitation-of-exchange-server-zero-day-cves-what-you-need-to-know/>) and the \u201cProxyShell\u201d exploit chain, which debuted at Pwn2Own and targets three now-patched CVEs in Exchange. Exchange continues to be a critically important attack surface area, and defenders should keep patched on a top-priority or zero-day basis wherever possible.\n * Print spooler vulnerabilities continue to cause nightmares. DEF CON saw the release of new privilege escalation exploits for Windows Print Spooler, and Black Hat featured a talk by Sangfor Technologies researchers that chronicled both [new Windows Print Spooler vulnerabilities](<https://attackerkb.com/assessments/85a30c9a-e126-4ec0-bda4-d166e03c5390>) and past patch bypasses for vulns like CVE-2020-1048 (whose patch was bypassed three times). Given that many defenders are still trying to remediate the \u201cPrintNightmare\u201d vulnerability from several weeks ago, it\u2019s fair to say that Windows Print Spooler will remain an important attack surface area to prioritize in future Patch Tuesdays.\n * There\u2019s also a new vulnerability in Pulse Connect Secure VPNs that caught our attention \u2014 the vuln is actually a bypass for CVE-2020-8260, which came out last fall and evidently didn\u2019t completely fade away \u2014 despite the fact that it\u2019s authenticated and requires admin access. With CISA\u2019s warnings about APT attacks against Pulse Connect Secure devices, it\u2019s probably wise to patch CVE-2021-22937 quickly.\n * And finally, the SpecterOps crew gave a highly anticipated Black Hat talk on several new attack techniques that [abuse Active Directory Certificate Services](<https://posts.specterops.io/certified-pre-owned-d95910965cd2>) \u2014 something we covered previously in our summary of the [PetitPotam attack chain](<https://www.rapid7.com/blog/post/2021/08/03/petitpotam-novel-attack-chain-can-fully-compromise-windows-domains-running-ad-cs/>). This is neat research for red teams, and it may well show up on blue teams\u2019 pentest reports.\n\n### Microsoft Exchange ProxyShell chain\n\n**Patches:** Available \n**Threat status:** Possible threat (at least one report of exploitation in the wild)\n\nIt goes without saying that Microsoft Exchange is a high-value, popular attack surface that gets constant attention from threat actors and researchers alike. That attention is increasing yet again after prominent security researcher Orange Tsai gave a talk at Black Hat USA last week revealing details on an attack chain first demonstrated at Pwn2Own. The chain, dubbed \u201cProxyShell,\u201d allows an attacker to take over an unpatched Exchange server. ProxyShell is similar to ProxyLogon (i.e., [CVE-2021-26855](<https://attackerkb.com/assessments/a5c77ede-3824-4176-a955-d6cf9a6a7417>) and [CVE-2021-27065](<https://attackerkb.com/assessments/74177979-e2ef-4078-9f91-993964292cfa>)), which continues to be popular in targeted attacks and opportunistic scans despite the fact that it was patched in March 2021.\n\nTwo of the three vulnerabilities used for ProxyShell were patched in April by Microsoft and the third was patched in July. As of August 9, 2021, private exploits have already been developed, and it\u2019s probably only a matter of time before public exploit code is released, which may allow for broader exploitation of the vulns in this attack chain (in spite of its complexity!). Rapid7 estimates that there are, at least, nearly 75,000 ProxyShell-vulnerable exchange servers online:\n\n\n\nWe strongly recommend that Exchange admins confirm that updates have been applied appropriately; if you haven\u2019t patched yet, you should do so immediately on an emergency basis.\n\nOne gotcha when it comes to Exchange administration is that Microsoft only releases security fixes for the [most recent Cumulative Update versions](<https://docs.microsoft.com/en-us/exchange/new-features/updates>), so it\u2019s vital to stay up to date with these quarterly releases in order to react quickly when new patches are published.\n\nProxyShell CVEs:\n\n * [CVE-2021-31207](<https://nvd.nist.gov/vuln/detail/CVE-2021-31207>)\n * [CVE-2021-34473](<https://nvd.nist.gov/vuln/detail/CVE-2021-34473>)\n * [CVE-2021-34523\u200b](<https://nvd.nist.gov/vuln/detail/CVE-2021-34523>)\n\n### Windows Print Spooler \u2014 and more printer woes\n\n**Patches:** Varies by CVE, mostly available \n**Threat status:** Varies by CVE, active and impending\n\nThe Windows Print Spooler was the subject of renewed attention after the premature disclosure of the PrintNightmare vulnerability earlier this summer, followed by new Black Hat and DEF CON talks last week. Among the CVEs discussed were a quartet of 2020 vulns (three of which were bypasses descended from CVE-2020-1048, which has been exploited in the wild since last year), three new remote code execution vulnerabilities arising from memory corruption flaws, and two new local privilege escalation vulnerabilities highlighted by researcher [Jacob Baines](<https://twitter.com/Junior_Baines>). Of this last group, one vulnerability \u2014 CVE-2021-38085 \u2014 remains unpatched.\n\nOn August 11, 2021, Microsoft assigned [CVE-2021-36958](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36958>) to the latest Print Spooler remote code execution vulnerability which appears to require local system access and user interaction. Further details are limited at this time. However, as mitigation, Microsoft is continuing to recommend stopping and disabling the Print Spooler service. Even after this latest zero-day vulnerability is patched, we strongly recommend leaving the Print Spooler service disabled wherever possible. Read Rapid7\u2019s [blog on PrintNightmare](<https://www.rapid7.com/blog/post/2021/06/30/cve-2021-1675-printnightmare-patch-does-not-remediate-vulnerability/>) for further details and updates.\n\nWindows Print Spooler and related CVEs:\n\n * [CVE-2020-1048](<https://attackerkb.com/topics/QoQvwrIqEV/cve-2020-1048-windows-print-spooler-elevation-of-privilege-vulnerability?referrer=blog>) (elevation of privilege vuln in Windows Print Spooler presented at Black Hat 2020; exploited in the wild, Metasploit module available)\n * [CVE-2020-1337](<https://attackerkb.com/topics/mEEwlfrTK3/cve-2020-1337?referrer=blog>) (patch bypass for CVE-2020-1048; Metasploit module available)\n * [CVE-2020-17001](<https://attackerkb.com/topics/oGAzAwKy1N/cve-2020-17001?referrer=blog>) (patch bypass variant for CVE-2020-1048)\n * [CVE-2020-17014](<https://attackerkb.com/topics/N9XhrkViyk/cve-2020-17014?referrer=blog>) (patch bypass variant for CVE-2020-1048)\n * [CVE-2020-1300](<https://attackerkb.com/topics/43jdEqsVY1/cve-2020-1300?referrer=blog>) (local privilege escalation technique known as \u201c[EvilPrinter](<https://twitter.com/R3dF09/status/1271485928989528064>)\u201d presented at DEF CON 2020)\n * [CVE-2021-24088](<https://attackerkb.com/assessments/85a30c9a-e126-4ec0-bda4-d166e03c5390>) (new remote code execution vulnerability in the Windows local spooler, as presented at Black Hat 2021)\n * [CVE-2021-24077](<https://attackerkb.com/topics/wiyGYban1l/cve-2021-24077?referrer=blog>) (new remote code execution vulnerability in the Windows Fax Service, as presented at Black Hat 2021)\n * [CVE-2021-1722](<https://attackerkb.com/topics/v1Qm7veSwf/cve-2021-1722?referrer=blog>) (new remote code execution vulnerability in the Windows Fax Service, as presented at Black Hat 2021)\n * [CVE-2021-1675](<https://attackerkb.com/topics/dI1bxlM0ay/cve-2021-1675?referrer=blog>) (elevation of privilege vuln in Windows Print Spooler patched in June 2021)\n * [CVE-2021-34527](<https://attackerkb.com/topics/MIHLz4sY3s/cve-2021-34527-printnightmare?referrer=blog>), aka \u201cPrintNightmare\u201d\n * [CVE-2021-35449](<https://attackerkb.com/topics/9sV2bS0OSj/cve-2021-35449?referrer=blog>) (print driver local privilege escalation vulnerability, as [presented](<https://www.youtube.com/watch?v=vdesswZYz-8>) at DEF CON 2021; Metasploit module in progress)\n * [CVE-2021-38085](<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38085>) (**unpatched** print driver local privilege escalation vulnerability, as [presented](<https://www.youtube.com/watch?v=vdesswZYz-8>) at DEF CON 2021; Metasploit module in progress)\n * [CVE-2021-36958](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36958>) (**unpatched** remote code execution vulnerability; announced August 11, 2021)\n\nCurrently, both [PrintNightmare](<https://www.rapid7.com/blog/post/2021/06/30/cve-2021-1675-printnightmare-patch-does-not-remediate-vulnerability/>) CVE-2021-34527 and CVE-2020-1048 are known to be exploited in the wild. As the list above demonstrates, patching print spooler and related vulns quickly and completely has been a challenge for Microsoft for the past year or so. The multi-step mitigations required for some vulnerabilities also give attackers an advantage. Defenders should harden printer setups wherever possible, including against malicious driver installation.\n\n### Pulse Connect Secure CVE-2021-22937\n\n**Patch:** Available \n**Threat status:** Impending (Exploitation expected soon)\n\nOn Monday, August 2, 2021, Ivanti published [Security Advisory SA44858](<https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44858>) which, among other fixes, includes a fix for CVE-2021-22937 for Pulse Connect Secure VPN Appliances running 9.1R11 or prior. Successful exploitation of this vulnerability, which carries a CVSSv3 score of 9.1, requires the use of an authenticated administrator account to achieve remote code execution (RCE) as user `root`.\n\nPublic proof-of-concept (PoC) exploit code has not been released as of this writing. However, this vulnerability is simply a workaround for [CVE-2020-8260](<https://blog.rapid7.com/2021/08/12/popular-attack-surfaces-august-2021-what-you-need-to-know/%E2%80%8B%E2%80%8Bhttps://attackerkb.com/topics/MToDzANCY4/cve-2020-8260?referrer=search#vuln-details>), an authentication bypass vulnerability that was heavily utilized by attackers, released in October 2020.\n\nThe Cybersecurity and Infrastructure Security Agency (CISA) has been monitoring the [Exploitation of Pulse Connect Secure Vulnerabilities](<https://us-cert.cisa.gov/ncas/alerts/aa21-110a>) demonstrating that attackers have been targeting Ivanti Pulse Connect Secure products for over a year. Due to attacker focus on Pulse Connect Secure products, and especially last year\u2019s CVE-2020-8260, Rapid7 recommends patching CVE-2021-22937 as soon as possible.\n\n### PetitPotam: Windows domain compromise\n\n**Patches:** Available \n**Threat status:** Threat (Exploited in the wild)\n\nIn July 2021, security researcher [Topotam](<https://github.com/topotam>) published a [PoC implementation](<https://github.com/topotam/PetitPotam>) of a novel NTLM relay attack christened \u201cPetitPotam.\u201d The technique used in the PoC allows a remote, unauthenticated attacker to completely take over a Windows domain with the Active Directory Certificate Service (AD CS) running \u2014 including domain controllers. Rapid7 researchers have tested public PoC code against a Windows domain controller setup and confirmed exploitability. One of our [senior researchers](<https://twitter.com/wvuuuuuuuuuuuuu>) summed it up with: &quot;This attack is too easy.&quot; You can read Rapid7\u2019s full blog post [here](<https://www.rapid7.com/blog/post/2021/08/03/petitpotam-novel-attack-chain-can-fully-compromise-windows-domains-running-ad-cs/>).\n\nOn August 10, 2021, Microsoft released a patch that addresses the PetitPotam NTLM relay attack vector in today's Patch Tuesday. Tracked as [CVE-2021-36942](<https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36942>), the August 2021 Patch Tuesday security update blocks the affected API calls [OpenEncryptedFileRawA](<https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-openencryptedfilerawa>) and [OpenEncryptedFileRawW](<https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-openencryptedfileraww>) through the LSARPC interface. Windows administrators should prioritize patching domain controllers and will still need to take additional steps listed in [KB5005413](<https://support.microsoft.com/en-us/topic/kb5005413-mitigating-ntlm-relay-attacks-on-active-directory-certificate-services-ad-cs-3612b773-4043-4aa9-b23d-b87910cd3429>) to ensure their systems are fully mitigated.\n\n### Rapid7 customers\n\nInsightVM and Nexpose customers can assess their exposure to the vulnerabilities in this post with authenticated vulnerability checks. Please note that details haven\u2019t yet been released on CVE-2021-38085 and CVE-2021-36958; therefore, it\u2019s still awaiting analysis and check development.\n\n### Updates\n\n**Pulse Connect Secure CVE-2021-22937** \nOn August 24, 2021, the Cybersecurity &amp; Infrastructure Security Agency (CISA) released [Malware Analysis Report (AR21-236E)](<https://us-cert.cisa.gov/ncas/analysis-reports/ar21-236e>) which includes indicators of compromise (IOCs) to assist with Pulse Connect Secure investigations.\n\n#### NEVER MISS A BLOG\n\nGet the latest stories, expertise, and news about security today.\n\nSubscribe", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 9.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 5.9}, "published": "2021-08-12T17:13:25", "type": "rapid7blog", "title": "Popular Attack Surfaces, August 2021: What You Need to Know", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 10.0, "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 10.0, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-1048", "CVE-2020-1300", "CVE-2020-1337", "CVE-2020-17001", "CVE-2020-17014", "CVE-2020-8260", "CVE-2021-1675", "CVE-2021-1722", "CVE-2021-22937", "CVE-2021-24077", "CVE-2021-24088", "CVE-2021-26855", "CVE-2021-27065", "CVE-2021-31207", "CVE-2021-34473", "CVE-2021-34523", "CVE-2021-34527", "CVE-2021-35449", "CVE-2021-36942", "CVE-2021-36958", "CVE-2021-38085"], "modified": "2021-08-12T17:13:25", "id": "RAPID7BLOG:5CDF95FB2AC31414FD390E0E0A47E057", "href": "https://blog.rapid7.com/2021/08/12/popular-attack-surfaces-august-2021-what-you-need-to-know/", "cvss": {"score": 10.0, "vector": "AV:N/AC:L/Au:N/C:C/I:C/A:C"}}]}