{"zdi": [{"lastseen": "2020-06-22T11:42:08", "bulletinFamily": "info", "cvelist": ["CVE-2018-7517"], "description": "This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of OMRON CX-Supervisor. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of SCS project files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code under the context of the current process.", "edition": 1, "modified": "2018-06-22T00:00:00", "published": "2018-03-23T00:00:00", "id": "ZDI-18-256", "href": "https://www.zerodayinitiative.com/advisories/ZDI-18-256/", "title": "OMRON CX-Supervisor SCS File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability", "type": "zdi", "cvss": {"score": 4.6, "vector": "AV:L/AC:L/Au:N/C:P/I:P/A:P"}}], "ics": [{"lastseen": "2020-12-18T03:22:35", "bulletinFamily": "info", "cvelist": ["CVE-2018-7517", "CVE-2018-7515", "CVE-2018-7519", "CVE-2018-7523", "CVE-2018-7521", "CVE-2018-7513", "CVE-2018-7525"], "description": "## 1\\. EXECUTIVE SUMMARY\n\n * **CVSS v3 5.3**\n\n * **ATTENTION**: Low skill level to exploit\n * **Vendor**: Omron\n * **Equipment**: CX-Supervisor\n * **Vulnerabilities**: Stack-based Buffer Overflow, Use After Free, Access of Uninitialized Pointer, Double Free, Out-of-bounds Write, Untrusted Pointer Dereference, Heap-based Buffer Overflow.\n\n## 2\\. UPDATE INFORMATION\n\nThis updated advisory is a follow-up to the original advisory titled ICSA-18-072-01 Omron CX-Supervisor that was published March 13, 2018, on the NCCIC/ICS-CERT website.\n\n## 3\\. RISK EVALUATION\n\nSuccessful exploitation of these vulnerabilities could allow remote code execution.\n\n## 4\\. TECHNICAL DETAILS\n\n### 4.1 AFFECTED PRODUCTS\n\nThe following versions of CX-Supervisor are affected:\n\n**\\--------- Begin Update A Part 1 of 2 --------**\n\n * CX-Supervisor: Versions 3.40 and prior\n\n**\\--------- End Update A Part 1 of 2 ----------**\n\n### 4.2 VULNERABILITY OVERVIEW\n\n**4.2.1 [STACK-BASED BUFFER OVERFLOW CWE-121](<https://cwe.mitre.org/data/definitions/121.html>)** \n \nParsing malformed project files may cause a stack-based buffer overflow. \n[CVE-2018-7513 ](<http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7513>)has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is ([AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L](<https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L>)). \n \n**4.2.2 [USE AFTER FREE CWE-416](<https://cwe.mitre.org/data/definitions/416.html>)** \n \nUse after free vulnerabilities can be exploited when CX Supervisor parses a specially crafted project file. \n[CVE-2018-7521 ](<http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7521>)has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is ([AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L](<https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L>)). \n \n**4.2.3 [ACCESS OF UNINITIALIZED POINTER CWE-824](<https://cwe.mitre.org/data/definitions/824.html>)** \n \nAccess of uninitialized pointer vulnerabilities can be exploited when CX Supervisor indirectly calls an initialized pointer when parsing malformed packets. \n[CVE-2018-7515 ](<http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7515>)has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is ([AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L](<https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L>)). \n \n**4.2.4 [DOUBLE FREE CWE-415](<https://cwe.mitre.org/data/definitions/415.html>)** \n \nParsing malformed project files may cause a double free vulnerability. \n[CVE-2018-7523 ](<http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7523>)has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is ([AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L](<https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L>)). \n \n**4.2.5 [OUT-OF-BOUNDS WRITE CWE-787](<https://cwe.mitre.org/data/definitions/787.html>)** \n \nParsing malformed project files may cause an out of bounds vulnerability. \n[CVE-2018-7517 ](<http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7517>)has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is ([AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L](<https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L>)). \n \n**4.2.6 [UNTRUSTED POINTER DEREFERENCE CWE-822](<https://cwe.mitre.org/data/definitions/822.html>)** \n \nProcessing a malformed packet by a certain executable may cause an untrusted pointer dereference vulnerability. \n[CVE-2018-7525 ](<http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7525>)has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is ([AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L](<https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L>)). \n \n**4.2.7 [HEAP-BASED BUFFER OVERFLOW CWE-122](<https://cwe.mitre.org/data/definitions/122.html>)** \n \nParsing malformed project files may cause a heap-based buffer overflow. \n[CVE-2018-7519 ](<http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7519>)has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is ([AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L](<https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L>)).\n\n### 4.3 BACKGROUND\n\n * **CRITICAL INFRASTRUCTURE SECTORS**: Energy\n * **COUNTRIES/AREAS DEPLOYED**: Worldwide\n * **COMPANY HEADQUARTERS LOCATION**: Japan\n\n### 4.4 RESEARCHER\n\n**\\--------- Begin Update A Part 2 of 2 --------**\n\nEsteban Ruiz (mr_me) of Source Incite and rgod working with Trend Micro\u2019s Zero Day Initiative reported these vulnerabilities to NCCIC.\n\n**\\--------- End Update A Part 2 of 2 ----------**\n\n## 5\\. MITIGATIONS\n\nOmron has released Version 3.4.1 of CX-Supervisor to address the reported vulnerabilities. Users can download the latest version of CX-Supervisor at the following location: \n \n[https://www.myomron.com/index.php?action=kb&article=1707](<https://www.myomron.com/index.php?action=kb&article=1707>) \n \nNCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:\n\n * Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet.\n * Locate control system networks and remote devices behind firewalls, and isolate them from the business network.\n * When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices.\n\nNCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. \n \nNCCIC also provides a section for control systems security recommended practices on the ICS-CERT web site. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.\n\nAdditional mitigation guidance and recommended practices are publicly available on the ICS-CERT web site in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies. \n \nOrganizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents.\n\nNCCIC also recommends that users take the following measures to protect themselves from social engineering attacks:\n\n * Do not click web links or open unsolicited attachments in email messages.\n * Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.\n * Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.\n\nNo known public exploits specifically target these vulnerabilities. These vulnerabilities are not exploitable remotely.\n\n## \nContact Information\n\nFor any questions related to this report, please contact the CISA at: \n \nEmail: [CISAservicedesk@cisa.dhs.gov](<mailto:cisaservicedesk@cisa.dhs.gov>) \nToll Free: 1-888-282-0870\n\nFor industrial control systems cybersecurity information: https://us-cert.cisa.gov/ics \nor incident reporting: https://us-cert.cisa.gov/report\n\nCISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product.\n\nThis product is provided subject to this Notification and this [Privacy & Use](<https://www.dhs.gov/privacy-policy>) policy.\n\n**Please share your thoughts.**\n\nWe recently updated our anonymous [product survey](<https://surveymonkey.com/r/G8STDRY?product=https://us-cert.cisa.gov/ics/advisories/ICSA-18-072-01>); we'd welcome your feedback.\n", "edition": 15, "modified": "2018-12-20T00:00:00", "published": "2018-03-13T00:00:00", "id": "ICSA-18-072-01", "href": "https://www.us-cert.gov//ics/advisories/ICSA-18-072-01", "title": "Omron CX-Supervisor (Update A)", "type": "ics", "cvss": {"score": 4.6, "vector": "AV:L/AC:L/Au:N/C:P/I:P/A:P"}}]}
