CVE-2019-13629 json
MatrixSSL 4.2.1 and earlier contains a timing side channel in ECDSA signature generation.
published 2019-10-03 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-5060
- cvss
- 5.9
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 69%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
1.24% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:P/I:N/A:N |
Classification
References
-
eprint.iacr.org
/2011/232.pdf
not-applicable
-
tches.iacr.org
/index.php/TCHES/article/view/7337
not-applicable
-
openwall.com
/lists/oss-security/2019/10/02/2
mailing-list, third-party-advisory
-
minerva.crocs.fi.muni.cz
/
product
Sources
- CVE List CVE-2019-13629
- NVD CVE-2019-13629
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.