CVE-2019-13629: matrixssl Observable Discrepancy
Vulnerability summary
CVE-2019-13629 is a medium (CVSS 5.9) Observable Discrepancy vulnerability in matrixssl. EPSS estimates a 1.24% chance of exploitation in the next 30 days, higher than 68.9% of scored vulnerabilities.
Timeline
- 03-10-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
1.24%
Chance of exploitation in the next 30 days
Percentile
69%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.24% on 22-09-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Matrixssl1 product
- matrixssl≤ 4.2.1
1 vendor · 1 product