{"id":"CVE-2019-13629","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-13629","generatedAt":"2026-10-29T00:09:42.338Z","title":"This allows a local or a remote attacker, able to measure the duration of hundreds to thousands of signing operations, to compute the private key used.","description":"MatrixSSL 4.2.1 and earlier contains a timing side channel in ECDSA signature generation. This allows a local or a remote attacker, able to measure the duration of hundreds to thousands of signing operations, to compute the private key used. The issue occurs because crypto/pubkey/ecc_math.c scalar multiplication leaks the bit length of the scalar.","published":"2019-10-03T14:15:11.000Z","lastModified":"2026-06-17T02:17:07.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-203","CWE-327"],"affected":["matrixssl/matrixssl"],"epss":{"score":0.0124,"percentile":0.69006,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.24%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://www.openwall.com/lists/oss-security/2019/10/02/2","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://eprint.iacr.org/2011/232.pdf","tags":["Not Applicable"],"source":"cve@mitre.org"},{"url":"https://minerva.crocs.fi.muni.cz/","tags":["Product"],"source":"cve@mitre.org"},{"url":"https://tches.iacr.org/index.php/TCHES/article/view/7337","tags":["Not Applicable"],"source":"cve@mitre.org"},{"url":"http://www.openwall.com/lists/oss-security/2019/10/02/2","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://eprint.iacr.org/2011/232.pdf","tags":["Not Applicable"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://minerva.crocs.fi.muni.cz/","tags":["Product"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://tches.iacr.org/index.php/TCHES/article/view/7337","tags":["Not Applicable"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-13629","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}