{"dataType": "CVE_RECORD", "dataVersion": "5.0", "cveMetadata": {"cveId": "CVE-2023-6992", "assignerOrgId": "a22f1246-ba21-4bb4-a601-ad51614c1513", "state": "PUBLISHED", "assignerShortName": "cloudflare", "dateReserved": "2023-12-20T10:48:40.396Z", "datePublished": "2024-01-04T11:11:07.558Z", "dateUpdated": "2024-01-04T11:14:15.933Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "packageName": "zlib", "platforms": ["C"], "product": "zlib", "repo": "https://github.com/cloudflare/zlib", "vendor": "Cloudflare", "versions": [{"lessThan": "8352d10", "status": "affected", "version": "0", "versionType": "git"}]}], "credits": [{"lang": "en", "type": "finder", "user": "00000000-0000-4000-9000-000000000000", "value": "Martin Schwarzl"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<span style=\"background-color: rgb(255, 255, 255);\">Cloudflare version of zlib library was found to be vulnerable to memory corruption issues affecting the deflation algorithm implementation (deflate.c). The issues resulted from improper input validation and heap-based buffer overflow.</span><br><span style=\"background-color: rgb(255, 255, 255);\">A local attacker could exploit the problem during compression using a crafted malicious file potentially leading to denial of service of the software.</span><br><span style=\"background-color: rgb(255, 255, 255);\">Patches: The issue has been patched in commit <a target=\"_blank\" rel=\"nofollow\" href=\"https://github.com/cloudflare/zlib/commit/8352d108c05db1bdc5ac3bdf834dad641694c13c\"><tt>8352d10</tt></a>. The upstream repository is not affected.</span><br>"}], "value": "Cloudflare version of zlib library was found to be vulnerable to memory corruption issues affecting the deflation algorithm implementation (deflate.c). The issues resulted from improper input validation and heap-based buffer overflow.\nA local attacker could exploit the problem during compression using a crafted malicious file potentially leading to denial of service of the software.\nPatches: The issue has been patched in commit 8352d10 https://github.com/cloudflare/zlib/commit/8352d108c05db1bdc5ac3bdf834dad641694c13c . The upstream repository is not affected.\n"}], "impacts": [{"capecId": "CAPEC-100", "descriptions": [{"lang": "en", "value": "CAPEC-100 Overflow Buffers"}]}, {"capecId": "CAPEC-17", "descriptions": [{"lang": "en", "value": "CAPEC-17 Using Malicious Files"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 4, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-20", "description": "CWE-20 Improper Input Validation", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-122", "description": "CWE-122: Heap-based Buffer Overflow", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-126", "description": "CWE-126: Buffer Over-read", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "a22f1246-ba21-4bb4-a601-ad51614c1513", "shortName": "cloudflare", "dateUpdated": "2024-01-04T11:14:15.933Z"}, "references": [{"tags": ["product"], "url": "https://github.com/cloudflare/zlib"}, {"tags": ["vendor-advisory"], "url": "https://github.com/cloudflare/zlib/security/advisories/GHSA-vww9-j87r-4cqh"}], "source": {"discovery": "INTERNAL"}, "title": "Memory corruption issues is Cloudflare zlib implementation", "x_generator": {"engine": "Vulnogram 0.1.0-dev"}}}}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:cloudflare:zlib:*:*:*:*:*:*:*:*", "matchCriteriaId": "6DAB9F62-5C2E-43C9-838C-081351A38200", "versionEndExcluding": "2023-11-16", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "Cloudflare version of zlib library was found to be vulnerable to memory corruption issues affecting the deflation algorithm implementation (deflate.c). The issues resulted from improper input validation and heap-based buffer overflow.\nA local attacker could exploit the problem during compression using a crafted malicious file potentially leading to denial of service of the software.\nPatches: The issue has been patched in commit 8352d10 https://github.com/cloudflare/zlib/commit/8352d108c05db1bdc5ac3bdf834dad641694c13c . The upstream repository is not affected.\n"}, {"lang": "es", "value": "Se descubri\u00f3 que la versi\u00f3n Cloudflare de la librer\u00eda zlib era vulnerable a problemas de corrupci\u00f3n de memoria que afectan la implementaci\u00f3n del algoritmo de deflaci\u00f3n (deflate.c). Los problemas se debieron a una validaci\u00f3n de entrada incorrecta y a un desbordamiento de b\u00fafer de almacenamiento din\u00e1mico. Un atacante local podr\u00eda aprovechar el problema durante la compresi\u00f3n utilizando un archivo malicioso manipulado que podr\u00eda provocar una denegaci\u00f3n de servicio del software. Parches: el problema se solucion\u00f3 en el commit 8352d10 https://github.com/cloudflare/zlib/commit/8352d108c05db1bdc5ac3bdf834dad641694c13c. El repositorio ascendente no se ve afectado."}], "id": "CVE-2023-6992", "lastModified": "2024-01-10T01:14:35.027", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 4.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 1.4, "impactScore": 2.5, "source": "cna@cloudflare.com", "type": "Secondary"}]}, "published": "2024-01-04T12:15:23.690", "references": [{"source": "cna@cloudflare.com", "tags": ["Product"], "url": "https://github.com/cloudflare/zlib"}, {"source": "cna@cloudflare.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/cloudflare/zlib/security/advisories/GHSA-vww9-j87r-4cqh"}], "sourceIdentifier": "cna@cloudflare.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-122"}, {"lang": "en", "value": "CWE-126"}, {"lang": "en", "value": "CWE-20"}], "source": "cna@cloudflare.com", "type": "Secondary"}]}

{}