{"id":"CVE-2022-24884","summary":"Trivial signature forgery in ecdsautils","details":"ecdsautils is a tiny collection of programs used for ECDSA (keygen, sign, verify). `ecdsa_verify_[prepare_]legacy()` does not check whether the signature values `r` and `s` are non-zero. A signature consisting only of zeroes is always considered valid, making it trivial to forge signatures. Requiring multiple signatures from different public keys does not mitigate the issue: `ecdsa_verify_list_legacy()` will accept an arbitrary number of such forged signatures. Both the `ecdsautil verify` CLI command and the libecdsautil library are affected. The issue has been fixed in ecdsautils 0.4.1. All older versions of ecdsautils (including versions before the split into a library and a CLI utility) are vulnerable.","aliases":["GHSA-qhcg-9ffp-78pw"],"modified":"2026-08-12T13:00:16.962958Z","published":"2022-05-05T23:50:10Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-347"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/24xxx/CVE-2022-24884.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/24xxx/CVE-2022-24884.json"},{"type":"ADVISORY","url":"https://github.com/freifunk-gluon/ecdsautils/security/advisories/GHSA-qhcg-9ffp-78pw"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4AKQH5WCBMJA3ODCSNERY6HVX4BX3ITG/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G2JT57AAFIEL7JDO2ZBV25JKYME5NU54/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7UBR3M4U3LA46BHXYSH7EN5GDG44GK7/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-24884"},{"type":"ADVISORY","url":"https://www.debian.org/security/2022/dsa-5132"},{"type":"FIX","url":"https://github.com/freifunk-gluon/ecdsautils/commit/1d4b091abdf15ad7b2312535b5b95ad70f6dbd08"},{"type":"FIX","url":"https://github.com/freifunk-gluon/ecdsautils/commit/39b6d0a77414fd41614953a0e185c4eefa2f88ad"},{"type":"ARTICLE","url":"https://lists.debian.org/debian-lts-announce/2022/05/msg00007.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/freifunk-gluon/ecdsautils","events":[{"introduced":"0"},{"fixed":"39b6d0a77414fd41614953a0e185c4eefa2f88ad"},{"fixed":"1d4b091abdf15ad7b2312535b5b95ad70f6dbd08"}],"database_specific":{"cpe":"cpe:2.3:a:ecdsautils_project:ecdsautils:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"0.4.1"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["v0.4","v0.3.2","v0.3.1","v0.3","v0.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-24884.json","vanir_signatures_modified":"2026-08-12T13:00:16Z","vanir_signatures":[{"id":"CVE-2022-24884-358f9939","signature_type":"Line","signature_version":"v1","source":"https://github.com/freifunk-gluon/ecdsautils/commit/1d4b091abdf15ad7b2312535b5b95ad70f6dbd08","target":{"file":"src/lib/ecdsa.c"},"deprecated":false,"digest":{"line_hashes":["143630150069356638074364150039331221000","210210585960021401077931282677466172631","225753318622654315338916413834097754653","42528740878146435379256156547878782625","130233975451800428024466981493793531383","191677052285956258279419656323798018925"],"threshold":0.9}},{"target":{"file":"src/lib/ecdsa.c","function":"ecdsa_verify_legacy"},"deprecated":false,"digest":{"function_hash":"240785990224321775575701964399649567139","length":298},"id":"CVE-2022-24884-69042cf8","signature_type":"Function","signature_version":"v1","source":"https://github.com/freifunk-gluon/ecdsautils/commit/1d4b091abdf15ad7b2312535b5b95ad70f6dbd08"},{"signature_version":"v1","source":"https://github.com/freifunk-gluon/ecdsautils/commit/1d4b091abdf15ad7b2312535b5b95ad70f6dbd08","target":{"file":"src/lib/ecdsa.c","function":"ecdsa_verify_prepare_legacy"},"deprecated":false,"digest":{"function_hash":"8730710822856787309344839916054533810","length":321},"id":"CVE-2022-24884-ad57e8af","signature_type":"Function"}]}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N"}]}