CVE-2019-13629

MEDIUM

MatrixSSL < 4.2.1 - Timing Side-Channel Attack in ECDSA Signature Generation

Title source: llm
STIX 2.1

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.

References (4)

Core 4
Core References
Not Applicable x_refsource_misc
https://eprint.iacr.org/2011/232.pdf
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2019/10/02/2
Product x_refsource_misc
https://minerva.crocs.fi.muni.cz/

Scores

CVSS v3 5.9
EPSS 0.0124
EPSS Percentile 65.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Details

CWE
CWE-327 CWE-203
Status published
Products (1)
matrixssl/matrixssl < 4.2.1
Published Oct 03, 2019
Tracked Since Feb 18, 2026