Vulnerability in Matrixssl
CVE-2019-13629
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.012 (68.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
Weakness classification (CWE)
References
- eprint.iacr.org/2011/232.pdf (Not Applicable)
- tches.iacr.org/index.php/TCHES/article/view/7337 (Not Applicable)
- www.openwall.com/lists/oss-security/2019/10/02/2 (mailing-list, Mailing List, Third Party Advisory)
- minerva.crocs.fi.muni.cz/ (Product)
Frequently asked questions
- What is CVE-2019-13629?
- CVE-2019-13629 is a medium-severity vulnerability in Matrixssl, classified under Observable Discrepancy. CVSS score: 5.9/10. Published 2019-10-03.
- How severe is CVE-2019-13629?
- Medium severity. CVSS v3 base score is 5.9 out of 10.