CVE-2019-13629

Name: CVE-2019-13629
Creator: NVD / NIST
Published: 2019-10-03T14:15:11.15+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 1.24%

Last modified Jun 17, 2026

CVE-2019-13629 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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. EPSS estimates a 1.24% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.9/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

1.24%

65.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Matrixssl	Matrixssl	<= 4.2.1

References

http://www.openwall.com/lists/oss-security/2019/10/02/2Mailing List, Third Party Advisory
https://eprint.iacr.org/2011/232.pdfNot Applicable
https://minerva.crocs.fi.muni.cz/Product
https://tches.iacr.org/index.php/TCHES/article/view/7337Not Applicable
http://www.openwall.com/lists/oss-security/2019/10/02/2Mailing List, Third Party Advisory
https://eprint.iacr.org/2011/232.pdfNot Applicable
https://minerva.crocs.fi.muni.cz/Product
https://tches.iacr.org/index.php/TCHES/article/view/7337Not Applicable

Timeline

Published: Oct 3, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-13629?

How severe is CVE-2019-13629?

CVE-2019-13629 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 1.24% probability of exploitation in the next 30 days.

How do I fix CVE-2019-13629?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-13629?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST