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{"id": "ZDI-21-442", "vendorId": null, "type": "zdi", "bulletinFamily": "info", "title": "(0Day) Advantech WebAccess/HMI Designer SNF File Parsing Memory Corruption Remote Code Execution Vulnerability", "description": "This vulnerability allows remote attackers to execute arbitrary code on affected installations of Advantech WebAccess/HMI Designer. 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 SNF files. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the current process.", "published": "2021-06-24T00:00:00", "modified": "2021-06-24T00:00:00", "cvss": {"score": 6.8, "vector": "AV:N/AC:M/Au:N/C:P/I:P/A:P"}, "cvss2": {"acInsufInfo": false, "cvssV2": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "severity": "MEDIUM", "userInteractionRequired": true}, "cvss3": {"cvssV3": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9}, "href": "https://www.zerodayinitiative.com/advisories/ZDI-21-442/", "reporter": "kimiya", "references": [], "cvelist": ["CVE-2021-33004"], "immutableFields": [], "lastseen": "2022-02-10T00:00:00", "viewCount": 15, "enchantments": {"dependencies": {"references": [{"type": "cve", "idList": ["CVE-2021-33004"]}, {"type": "ics", "idList": ["ICSA-21-173-01"]}, {"type": "zdi", "idList": ["ZDI-21-441", "ZDI-21-489"]}], "rev": 4}, "score": {"value": 5.0, "vector": "NONE"}, "backreferences": {"references": [{"type": "cve", "idList": ["CVE-2021-33004"]}, {"type": "zdi", "idList": ["ZDI-21-441", "ZDI-21-489"]}]}, "exploitation": null, "epss": [{"cve": "CVE-2021-33004", "epss": "0.004790000", "percentile": "0.720660000", "modified": "2023-03-17"}], "vulnersScore": 5.0}, "_state": {"dependencies": 1647589307, "score": 1659749172, "epss": 1679070268}}

{"cve": [{"lastseen": "2023-02-09T14:22:14", "description": "The affected product is vulnerable to memory corruption condition due to lack of proper validation of user supplied files, which may allow an attacker to execute arbitrary code. User interaction is required on the WebAccess HMI Designer (versions 2.1.9.95 and prior).", "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": "2021-06-24T18:15:00", "type": "cve", "title": "CVE-2021-33004", "cwe": ["CWE-787"], "bulletinFamily": "NVD", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 6.8, "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-33004"], "modified": "2022-07-02T18:15:00", "cpe": ["cpe:/a:advantech:webaccess\\/hmi_designer:2.1.9.95"], "id": "CVE-2021-33004", "href": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33004", "cvss": {"score": 6.8, "vector": "AV:N/AC:M/Au:N/C:P/I:P/A:P"}, "cpe23": ["cpe:2.3:a:advantech:webaccess\\/hmi_designer:2.1.9.95:*:*:*:*:*:*:*"]}], "zdi": [{"lastseen": "2022-01-31T22:23:55", "description": "This vulnerability allows remote attackers to execute arbitrary code on affected installations of Advantech WebAccess/HMI Designer. 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 PM3 files. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the current process.", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 7.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "userInteraction": "REQUIRED", "version": "3.1"}, "impactScore": 5.9}, "published": "2021-06-24T00:00:00", "type": "zdi", "title": "(0Day) Advantech WebAccess/HMI Designer PM3 File Parsing Memory Corruption Remote Code Execution Vulnerability", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 6.8, "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-33004"], "modified": "2021-06-24T00:00:00", "id": "ZDI-21-489", "href": "https://www.zerodayinitiative.com/advisories/ZDI-21-489/", "cvss": {"score": 6.8, "vector": "AV:N/AC:M/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2022-01-31T22:24:57", "description": "This vulnerability allows remote attackers to execute arbitrary code on affected installations of Advantech WebAccess/HMI Designer. 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 PLF files. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the current process.", "cvss3": {"exploitabilityScore": 1.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 7.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "userInteraction": "REQUIRED", "version": "3.1"}, "impactScore": 5.9}, "published": "2021-04-27T00:00:00", "type": "zdi", "title": "(0Day) Advantech WebAccess/HMI Designer PLF File Parsing Memory Corruption Remote Code Execution Vulnerability", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 6.8, "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-33004"], "modified": "2021-06-23T00:00:00", "id": "ZDI-21-441", "href": "https://www.zerodayinitiative.com/advisories/ZDI-21-441/", "cvss": {"score": 6.8, "vector": "AV:N/AC:M/Au:N/C:P/I:P/A:P"}}], "cnvd": [{"lastseen": "2022-11-05T10:38:08", "description": "Advantech WebAccess HMI Designer is a human-machine interface integrated development tool from Advantech of Taiwan, China. WebAccess HMI Designer 2.1.9.95 and earlier versions contain a buffer overflow vulnerability that could be exploited by remote attackers to execute arbitrary code on the target system using specially designed files.", "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": "2021-06-24T00:00:00", "type": "cnvd", "title": "Advantech WebAccess HMI Designer Buffer Overflow Vulnerability (CNVD-2021-60559)", "bulletinFamily": "cnvd", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 6.8, "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-33004"], "modified": "2021-08-10T00:00:00", "id": "CNVD-2021-60559", "href": "https://www.cnvd.org.cn/flaw/show/CNVD-2021-60559", "cvss": {"score": 6.8, "vector": "AV:N/AC:M/Au:N/C:P/I:P/A:P"}}], "ics": [{"lastseen": "2023-03-14T18:29:36", "description": "## 1\\. EXECUTIVE SUMMARY\n\n * **CVSS v3 7.8**\n * **ATTENTION:** Low attack complexity\n * **Vendor:** Advantech\n * **Equipment:** WebAccess HMI Designer\n\n**\\--------- Begin Update A Part 1 of 6 ---------**\n\n * **Vulnerabilities: **Heap-based Buffer Overflow, Out-of-bounds Write, Improper Restriction of Operation Within the Bounds of a Memory Buffer, Use After Free, Cross-site Scripting\n\n**\\--------- End Update A Part 1 of 6 ---------**\n\n## 2\\. UPDATE INFORMATION\n\nThis updated advisory is a follow-up to the original advisory titled ICSA-21-173-01 Advantech WebAccess HMI Designer that was published June 22, 2021, to the ICS webpage on us-cert.cisa.gov.\n\n## 3\\. RISK EVALUATION\n\n**\\--------- Begin Update A Part 2 of 6 ---------**\n\nSuccessful exploitation of these vulnerabilities could result in memory corruption, code execution, hijacking of user\u2019s cookie/session tokens, and unintended browser action.\n\n**\\--------- End Update A Part 2 of 6 ---------**\n\n## 4\\. TECHNICAL DETAILS\n\n### 4.1 AFFECTED PRODUCTS\n\nThe following versions of Advantech WebAccess HMI Designer are affected:\n\n**\\--------- Begin Update A Part 3 of 6 ---------**\n\n * WebAccess HMI Designer Versions prior to 2.1.11.0\n\n**\\--------- End Update A Part 3 of 6 ---------**\n\n### 4.2 VULNERABILITY OVERVIEW\n\n#### 4.2.1 [HEAP-BASED BUFFER OVERFLOW CWE-122](<https://cwe.mitre.org/data/definitions/122.html>)\n\nParsing a maliciously crafted project file may cause a heap-based buffer overflow, which may allow an attacker to perform arbitrary code execution. User interaction is required.\n\n[CVE-2021-33000](<http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33000>) has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is ([AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H](<https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H>)).\n\n#### 4.2.2 [OUT-OF-BOUNDS WRITE CWE-787](<https://cwe.mitre.org/data/definitions/787.html>)\n\nOpening a maliciously crafted project file may cause an out-of-bounds write, which may allow an attacker to execute arbitrary code. User interaction is required.\n\n[CVE-2021-33002](<http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33002>) has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is ([AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H](<https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H>)).\n\n#### 4.2.3 [IMPROPER RESTRICTION OF OPERATION WITHIN THE BOUNDS OF A MEMORY BUFFER CWE-119](<https://cwe.mitre.org/data/definitions/119.html>)\n\nThe affected product is vulnerable to memory corruption condition due to lack of proper validation of user supplied files, which may allow an attacker to execute arbitrary code. User interaction is required.\n\n[CVE-2021-33004](<http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33004>) has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is ([AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H](<https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H>)).\n\n**\\--------- Begin Update A Part 4 of 6 ---------**\n\n#### 4.2.4 [USE AFTER FREE CWE-416](<https://cwe.mitre.org/data/definitions/416.html>)\n\nThis vulnerability could allow an attacker to disclose information and execute arbitrary code on affected installations of WebAccess/MHI Designer.\n\n[CVE-2021-42706](<http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-42706>) has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is ([AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H](<https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H>)).\n\n#### 4.2.5 [IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE SCRIPTING') CWE-79](<https://cwe.mitre.org/data/definitions/79.html>)\n\nThis vulnerability could allow an attacker to send malicious Javascript code resulting in hijacking of the user\u2019s cookie/session tokens, redirecting the user to a malicious webpage, and performing unintended browser action.\n\n[CVE-2021-42703](<http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-42703>) has been assigned to this vulnerability. A CVSS v3 base score of 5.4 has been calculated; the CVSS vector string is ([AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N](<https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N>)).\n\n**\\--------- End Update A Part 4 of 6 ---------**\n\n### 4.3 BACKGROUND\n\n * **CRITICAL INFRASTRUCTURE SECTORS:** Critical Manufacturing, Energy, Water and Wastewater Systems\n * **COUNTRIES/AREAS DEPLOYED:** East Asia, Europe, United States\n * **COMPANY HEADQUARTERS LOCATION:** Taiwan\n\n### 4.4 RESEARCHER\n\n**\\--------- Begin Update A Part 5 of 6 ---------**\n\nkimiya, working with Trend Micro\u2019s Zero Day Initiative, Chizuru Toyama of TXOne IoT/ICS Security Research Labs, and Michael Heinzl reported these vulnerabilities to CISA.\n\n**\\--------- End Update A Part 5 of 6 ---------**\n\n## 5\\. MITIGATIONS\n\n**\\--------- Begin Update A Part 6 of 6 ---------**\n\nAdvantech recommends users update to the latest version of [WebAccess HMI Designer v2.1.11.0](<https://www.advantech.com/support/details/installation?id=1-F6UG0T>)\n\nSpecific questions should be directed to [Advantech customer service](<https://www.advantech.com/contact>).\n\n**\\--------- End Update A Part 6 of 6 ---------**\n\nCISA recommends 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](<https://us-cert.cisa.gov/sites/default/files/publications/emailscams_0905.pdf>) for more information on avoiding email scams. \n * Refer to [Avoiding Social Engineering and Phishing Attacks](<https://www.us-cert.cisa.gov/ncas/tips/ST04-014>) for more information on social engineering attacks.\n\nCISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.\n\nCISA also provides a section for [control systems security recommended practices](<https://us-cert.cisa.gov/ics/recommended-practices>) on the ICS webpage on [us-cert.cisa.gov](<https://us-cert.cisa.gov/ics>). Several recommended practices are available for reading and download, including [Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies](<https://us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf>).\n\nAdditional mitigation guidance and recommended practices are publicly available on the [ICS webpage on us-cert.cisa.gov](<https://us-cert.cisa.gov/ics>) in the Technical Information Paper, [ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies](<https://us-cert.cisa.gov/ics/tips/ICS-TIP-12-146-01B>).\n\nOrganizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents.\n\nNo known public exploits specifically target these vulnerabilities. These vulnerabilities are not exploitable remotely.\n\n### Vendor\n\nAdvantech\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": "2021-11-10T12:00:00", "type": "ics", "title": "Advantech WebAccess HMI Designer (Update A)", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 6.8, "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-33000", "CVE-2021-33002", "CVE-2021-33004", "CVE-2021-42703", "CVE-2021-42706"], "modified": "2021-11-10T12:00:00", "id": "ICSA-21-173-01", "href": "https://www.cisa.gov/news-events/ics-advisories/icsa-21-173-01", "cvss": {"score": 6.8, "vector": "AV:N/AC:M/Au:N/C:P/I:P/A:P"}}]}