{"id":"CVE-2019-13628","details":"wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc, --enable-sp, or --enable-sp-math) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.","aliases":["GHSA-q95h-vc86-hv77","PYSEC-2026-1066"],"modified":"2026-07-22T03:44:48.596752Z","published":"2019-10-03T14:15:11.057Z","references":[{"type":"WEB","url":"https://minerva.crocs.fi.muni.cz/"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2019/10/02/2"},{"type":"ADVISORY","url":"https://eprint.iacr.org/2011/232.pdf"},{"type":"ADVISORY","url":"https://tches.iacr.org/index.php/TCHES/article/view/7337"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/wolfssl/wolfssl","events":[{"introduced":"0"},{"last_affected":"21f2beca9f320199fcea4a96df3e19967804144b"}],"database_specific":{"cpe":"cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"4.0.0"}],"source":"CPE_RANGE"}}],"versions":["v4.0.0-stable","list","v3.15.7-stable","v3.15.6","v3.15.5a","v3.15.5-stable","WCv4-rng-stable","v3.15.3-stable","l","v3.15.0-stable","v3.14.4","v3.14.2","v3.14.0b","v3.14.0a","v3.14.0-stable","v3.13.3","v3.13.2","v3.13.0-stable","v3.12.2-stable","v3.12.0-stable","v3.11.1-tls13-beta","v3.11.0-stable","v3.10.3","v3.10.2-stable","v3.10.0a","v3.10.0-stable","v3.9.10b","v3.9.10-stable","v3.9.8","v3.9.6w","v3.9.6","v3.9.1","v3.9.0","v3.8.0","v3.7.3","v3.7.1","v3.7.0","v3.6.9","v3.6.8","v3.4.6","v3.4.2","v3.4.0","v3.3.3","v3.3.0","v3.2.6","v3.2.4","v3.2.0","v2.9.4","v2.9.2","v2.9.1","v0.5","v2.9.0","v2.8.6","v2.8.5a","v2.8.5","v2.8.4","v2.8.3","v2.8.2","v2.8.0","v2.7.2","v2.7.0","v2.6.2","v2.6.0","v2.4.7","v2.4.6","v2.4.2","v2.0.8","v2.0.6","v2.0.3","v2.0.2","v2.0rc3","v2.0rc2b","v2.0rc2","v2.0rc1","v1.9.0","v1.8.8.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-13628.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"}]}