{"id":"CVE-2025-66220","state":"PUBLISHED","title":"Envoy’s TLS certificate matcher for `match_typed_subject_alt_names` may incorrectly treat certificates containing an embedded null byte","description":"Envoy is a high-performance edge/middle/service proxy. In 1.33.12, 1.34.10, 1.35.6, 1.36.2, and earlier, Envoy’s mTLS certificate matcher for match_typed_subject_alt_names may incorrectly treat certificates containing an embedded null byte (\\0) inside an OTHERNAME SAN value as valid matches.","publishedAt":"2025-12-03T18:31:50.389Z","updatedAt":"2025-12-03T19:10:53.694Z","severity":{"score":5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["envoyproxy envoy"],"affected":[{"vendor":"envoyproxy","product":"envoy","versions":[{"version":">= 1.36.0, <= 1.36.2","status":"affected"},{"version":">= 1.35.0, <= 1.35.6","status":"affected"},{"version":">= 1.34.0, <= 1.34.10","status":"affected"},{"version":"<= 1.33.12","status":"affected"}]}],"references":["https://github.com/envoyproxy/envoy/security/advisories/GHSA-rwjg-c3h2-f57p"],"weaknesses":["CWE-170"],"ingestedAt":"2026-10-29T20:09:56.034Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/66xxx/CVE-2025-66220.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-66220","state":"PUBLISHED","datePublished":"2025-12-03T18:31:50.389Z","dateUpdated":"2025-12-03T19:10:53.694Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2025-11-24T23:01:29.679Z"},"containers":{"cna":{"title":"Envoy’s TLS certificate matcher for `match_typed_subject_alt_names` may incorrectly treat certificates containing an embedded null byte","descriptions":[{"lang":"en","value":"Envoy is a high-performance edge/middle/service proxy. In 1.33.12, 1.34.10, 1.35.6, 1.36.2, and earlier, Envoy’s mTLS certificate matcher for match_typed_subject_alt_names may incorrectly treat certificates containing an embedded null byte (\\0) inside an OTHERNAME SAN value as valid matches."}],"affected":[{"vendor":"envoyproxy","product":"envoy","versions":[{"version":">= 1.36.0, <= 1.36.2","status":"affected"},{"version":">= 1.35.0, <= 1.35.6","status":"affected"},{"version":">= 1.34.0, <= 1.34.10","status":"affected"},{"version":"<= 1.33.12","status":"affected"}]}],"references":[{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-rwjg-c3h2-f57p","name":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-rwjg-c3h2-f57p","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-170","lang":"en","description":"CWE-170: Improper Null Termination","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2025-12-03T18:31:50.389Z"},"source":{"advisory":"GHSA-rwjg-c3h2-f57p","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-12-03T19:10:43.590627Z","id":"CVE-2025-66220","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-12-03T19:10:53.694Z"}}]}}}