VULNERABILITY INTELLIGENCE

CVE-2019-13629

CVSS score5.9 MEDIUM
EPSS probability1.24%
CISA KEVNot currently listed
Published2019-10-03
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

Weakness classification

  • nvd@nist.gov: CWE-203

Primary references