{"id":"CVE-2023-3446","revision":null,"records":[{"revision":"1cb396de88db416892fa0856e833ad8c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2023-3446","aliases":[],"title":"Excessive time spent checking DH keys and parameters","description":"Issue summary: Checking excessively long DH keys or parameters may be very slow.\n\nImpact summary: Applications that use the functions DH_check(), DH_check_ex()\nor EVP_PKEY_param_check() to check a DH key or DH parameters may experience long\ndelays. Where the key or parameters that are being checked have been obtained\nfrom an untrusted source this may lead to a Denial of Service.\n\nThe function DH_check() performs various checks on DH parameters. One of those\nchecks confirms that the modulus ('p' parameter) is not too large. Trying to use\na very large modulus is slow and OpenSSL will not normally use a modulus which\nis over 10,000 bits in length.\n\nHowever the DH_check() function checks numerous aspects of the key or parameters\nthat have been supplied. Some of those checks use the supplied modulus value\neven if it has already been found to be too large.\n\nAn application that calls DH_check() and supplies a key or parameters obtained\nfrom an untrusted source could be vulernable to a Denial of Service attack.\n\nThe function DH_check() is itself called by a number of other OpenSSL functions.\nAn application calling any of those other functions may similarly be affected.\nThe other functions affected by this are DH_check_ex() and\nEVP_PKEY_param_check().\n\nAlso vulnerable are the OpenSSL dhparam and pkeyparam command line applications\nwhen using the '-check' option.\n\nThe OpenSSL SSL/TLS implementation is not affected by this issue.\nThe OpenSSL 3.0 and 3.1 FIPS providers are not affected by this issue.","state":0,"publishedAt":"2023-07-19T11:31:34.994+00:00","modifiedAt":"2026-10-14T20:55:30.042+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\": \"3.1.2\",\n                            \"status\": \"affected\",\n                            \"version\": \"3.1.0\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"lessThan\": \"3.0.10\",\n                            \"status\": \"affected\",\n                            \"version\": \"3.0.0\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"lessThan\": \"1.1.1v\",\n                            \"status\": \"affected\",\n                            \"version\": \"1.1.1\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"lessThan\": \"1.0.2zi\",\n                            \"status\": \"affected\",\n                            \"version\": \"1.0.2\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://www.openssl.org/news/secadv/20230719.txt","https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=fc9867c1e03c22ebf56943be205202e576aabf23","https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=1fa20cf2f506113c761777127a38bce5068740eb","https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=8780a896543a654e757db1b9396383f9d8095528","https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=9a0a4d3c1e7138915563c0df4fe6a3f9377b839c"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-3446","license":"CVE Program Terms of Use","key":"cve-program:CVE-2023-3446","identifiers":["CVE-2023-3446"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-09T23:04:35.5115198+00:00","complete":true,"records":1773,"lastAttemptAt":"2026-11-09T23:04:35.5115198+00:00","lastSuccessAt":"2026-11-09T23:04:35.7199619+00:00","error":null,"lastVerifiedAt":"2026-11-09T23:04:35.7199622+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-24e6fde7b744113daefb8f6135035fb8a5c69c9617c9c0d40574a0376532ffd3-dd2a77f649768340b3da193d98d597fa46c17d01cc081b31103212155ce6cd5d","complete":true,"records":421715,"lastAttemptAt":"2026-11-09T23:02:22.2942221+00:00","lastSuccessAt":"2026-11-09T23:02:22.1588494+00:00","error":null,"lastVerifiedAt":"2026-11-09T23:02:22.2942221+00:00","snapshotPublishedAt":"2026-11-09T22:27:08+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. 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-47ea30d05491460caa5ce44b8cba58f9","complete":false,"records":13686,"lastAttemptAt":"2026-11-09T23:17:21.9523007+00:00","lastSuccessAt":"2026-11-09T23:17:21.948+00:00","error":"35 identifier lookups failed; latest failures include HTTP 403. Other identifiers were checked independently.","lastVerifiedAt":"2026-11-09T23:17:21.948+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13669,"expectedIdentifiers":13739,"failedIdentifiers":35},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-09T23:04:35.5115198+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T23:04:35.5115198+00:00","lastSuccessAt":"2026-11-09T23:04:35.7206951+00:00","error":null,"lastVerifiedAt":"2026-11-09T23:04:35.7206952+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. No reader inventory is sent.","generation":"enrichment-adb512372f6d42c7b17c6efd528c7d57","complete":false,"records":13692,"lastAttemptAt":"2026-11-09T23:05:02.0476605+00:00","lastSuccessAt":"2026-11-09T23:05:02.041+00:00","error":null,"lastVerifiedAt":"2026-11-09T23:05:02.041+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13704,"expectedIdentifiers":13739,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-f16b02cc2b44d5413157015d03b8f1bf0217fdb477438e8f5866bcf35b179abd","complete":true,"records":9930,"lastAttemptAt":"2026-11-09T23:04:35.3476978+00:00","lastSuccessAt":"2026-11-09T23:04:34.9543246+00:00","error":null,"lastVerifiedAt":"2026-11-09T23:04:35.3476978+00:00","snapshotPublishedAt":"2026-11-09T23:03:07+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-26503967ae4379db8f374089589d6e03fb15bd31f820c9e992aaf93840c2236c","complete":true,"records":1971,"lastAttemptAt":"2026-11-09T23:02:22.4504307+00:00","lastSuccessAt":"2026-11-09T21:02:20.472473+00:00","error":null,"lastVerifiedAt":"2026-11-09T23:02:22.4504307+00:00","snapshotPublishedAt":"2026-11-09T20:18:18+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-761ecc9061239b0da572dc9254c6f384c1d19339eb08408c436647a2f26129e9","complete":true,"records":3064,"lastAttemptAt":"2026-11-09T23:04:35.4661135+00:00","lastSuccessAt":"2026-11-09T17:05:03.4044794+00:00","error":null,"lastVerifiedAt":"2026-11-09T23:04:35.4661135+00:00","snapshotPublishedAt":"2026-11-09T16:33:20+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-fe5caa127af053959ad6ee208ca92e895a6f5d3c14202fe035925df5f35ffed2","complete":true,"records":231329,"lastAttemptAt":"2026-11-09T23:04:24.8967882+00:00","lastSuccessAt":"2026-11-09T23:04:23.4601156+00:00","error":null,"lastVerifiedAt":"2026-11-09T23:04:24.8967882+00:00","snapshotPublishedAt":"2026-11-09T22:48:12+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}