CVE-2019-13629

MediumCVSS 5.9/10Last modified Jun 17, 2026

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 5.9/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-203 CWE-327

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

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
NVD status: Modified

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