{"id":"GHSA-r28h-x6hv-2fq3","summary":"Improper Verification of Cryptographic Signature in starkbank-ecdsa","details":"The verify function in the Stark Bank Java ECDSA library (ecdsa-java) 1.0.0 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.","aliases":["CVE-2021-43570"],"modified":"2025-01-20T16:24:44.700803Z","published":"2021-11-10T20:48:00Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2021-11-10T18:25:02Z","nvd_published_at":"2021-11-09T22:15:00Z","cwe_ids":["CWE-347"],"severity":"CRITICAL"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43570"},{"type":"WEB","url":"https://github.com/starkbank/ecdsa-java/pull/16"},{"type":"WEB","url":"https://github.com/starkbank/ecdsa-java/commit/ed22e484186d6c66d3686bfe39d01bdbabf219b6"},{"type":"PACKAGE","url":"https://github.com/starkbank/ecdsa-java"},{"type":"WEB","url":"https://github.com/starkbank/ecdsa-java/releases/tag/v1.0.1"},{"type":"WEB","url":"https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries"}],"affected":[{"package":{"name":"com.starkbank.ellipticcurve:starkbank-ecdsa","ecosystem":"Maven","purl":"pkg:maven/com.starkbank.ellipticcurve/starkbank-ecdsa"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.1"}]}],"versions":["1.0.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/11/GHSA-r28h-x6hv-2fq3/GHSA-r28h-x6hv-2fq3.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}