{"id":"CVE-2019-13629","aliases":["EUVD-2019-5060","GHSA-p73v-qh88-fqc2"],"status":"published","title":"MatrixSSL 4.2.1 and earlier contains a timing side channel in ECDSA signature generation. This...","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.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.0124,"percentile":0.69397,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-203","CWE-327"],"published":"2019-10-03T13:23:25Z","modified":"2026-06-17T02:17:06Z","products":[{"vendor":"matrixssl","product":"matrixssl"}],"references":[{"url":"https://eprint.iacr.org/2011/232.pdf","tags":["x_refsource_MISC","x_transferred","Not Applicable"]},{"url":"https://tches.iacr.org/index.php/TCHES/article/view/7337","tags":["x_refsource_MISC","x_transferred","Not Applicable"]},{"url":"http://www.openwall.com/lists/oss-security/2019/10/02/2","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory"]},{"url":"https://minerva.crocs.fi.muni.cz/","tags":["x_refsource_MISC","x_transferred","Product"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-13629"},{"url":"https://github.com/advisories/GHSA-p73v-qh88-fqc2"}],"sources":{"cve":[{"id":"CVE-2019-13629","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.","status":"published","published":"2019-10-03T13:23:25Z","modified":"2024-08-04T23:57:39.514Z","updated_at":"2026-11-02T14:20:24.357095Z"}],"euvd":[{"id":"EUVD-2019-5060","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.","status":"published","published":"2019-10-03T13:23:25Z","modified":"2024-08-04T23:57:39Z","updated_at":"2026-11-03T02:40:42.016311Z"}],"ghsa":[{"id":"GHSA-p73v-qh88-fqc2","title":"MatrixSSL 4.2.1 and earlier contains a timing side channel in ECDSA signature generation. This...","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.","status":"published","published":"2022-05-24T16:57:47Z","modified":"2023-01-28T05:07:45Z","cwes":["CWE-327"],"updated_at":"2026-11-02T14:44:34.06652Z"}],"nvd":[{"id":"CVE-2019-13629","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.","status":"published","published":"2019-10-03T14:15:11.15Z","modified":"2026-06-17T02:17:06.883Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-203","CWE-327"],"updated_at":"2026-11-02T14:05:31.019577Z"}]}}