{"id":"CVE-2023-6992","state":"PUBLISHED","title":"Memory corruption issues is Cloudflare zlib implementation","description":"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","publishedAt":"2024-01-04T11:11:07.558Z","updatedAt":"2024-09-06T18:16:58.376Z","severity":{"score":4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L","source":"cloudflare"},"assigner":"cloudflare","products":["Cloudflare zlib"],"affected":[{"vendor":"Cloudflare","product":"zlib","packageName":"zlib","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"8352d10","versionType":"git"}],"platforms":["C"],"repo":"https://github.com/cloudflare/zlib"}],"references":["https://github.com/cloudflare/zlib","https://github.com/cloudflare/zlib/security/advisories/GHSA-vww9-j87r-4cqh"],"weaknesses":["CWE-20","CWE-122","CWE-126"],"ingestedAt":"2026-10-29T20:06:42.242Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/6xxx/CVE-2023-6992.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-6992","state":"PUBLISHED","datePublished":"2024-01-04T11:11:07.558Z","dateUpdated":"2024-09-06T18:16:58.376Z","assignerShortName":"cloudflare","assignerOrgId":"a22f1246-ba21-4bb4-a601-ad51614c1513","dateReserved":"2023-12-20T10:48:40.396Z"},"containers":{"cna":{"title":"Memory corruption issues is Cloudflare zlib implementation","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). 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