{"id":"CVE-2023-0464","revision":null,"records":[{"revision":"1746e39427c54744806888fb067eeb1a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2023-0464","aliases":[],"title":"Excessive Resource Usage Verifying X.509 Policy Constraints","description":"A security vulnerability has been identified in all supported versions\n\nof OpenSSL related to the verification of X.509 certificate chains\nthat include policy constraints.  Attackers may be able to exploit this\nvulnerability by creating a malicious certificate chain that triggers\nexponential use of computational resources, leading to a denial-of-service\n(DoS) attack on affected systems.\n\nPolicy processing is disabled by default but can be enabled by passing\nthe `-policy' argument to the command line utilities or by calling the\n`X509_VERIFY_PARAM_set1_policies()' function.","state":0,"publishedAt":"2023-03-22T16:36:47.383+00:00","modifiedAt":"2026-10-14T19:41:20.251+00:00","affected":[{"ecosystem":"Vendor product","name":"OpenSSL","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"product\": \"OpenSSL\",\n                    \"vendor\": \"OpenSSL\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"3.1.1\",\n                            \"status\": \"affected\",\n                            \"version\": \"3.1.0\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"lessThan\": \"3.0.9\",\n                            \"status\": \"affected\",\n                            \"version\": \"3.0.0\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"lessThan\": \"1.1.1u\",\n                            \"status\": \"affected\",\n                            \"version\": \"1.1.1\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"lessThan\": \"1.0.2zh\",\n                            \"status\": \"affected\",\n                            \"version\": \"1.0.2\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://www.openssl.org/news/secadv/20230322.txt","https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=2017771e2db3e2b96f89bbe8766c3209f6a99545","https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=959c59c7a0164117e7f8366466a32bb1f8d77ff1","https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=879f7080d7e141f415c79eaa3a8ac4a3dad0348b","https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=2dcd4f1e3115f38cefa43e3efbe9b801c27e642e","https://www.couchbase.com/alerts/","https://www.debian.org/security/2023/dsa-5417","https://lists.debian.org/debian-lts-announce/2023/06/msg00011.html","https://security.gentoo.org/glsa/202402-08","https://security.netapp.com/advisory/ntap-20240621-0006/"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-0464","license":"CVE Program Terms of Use","key":"cve-program:CVE-2023-0464","identifiers":["CVE-2023-0464"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-275013ae8c9c4429826b8c1f57f6ff85","complete":false,"records":13689,"lastAttemptAt":"2026-11-10T00:06:26.5191066+00:00","lastSuccessAt":"2026-11-10T00:06:26.5900628+00:00","error":null,"lastVerifiedAt":"2026-11-10T00:06:26.5900628+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-10T00:04:20.9434546+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-10T00:04:20.9434546+00:00","lastSuccessAt":"2026-11-10T00:04:21.6231234+00:00","error":null,"lastVerifiedAt":"2026-11-10T00:04:21.6231235+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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