Medium severity5.9NVD Advisory· Published Oct 3, 2019· Updated Jun 17, 2026
CVE-2019-13629
CVE-2019-13629
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.
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Affected products
3- MatrixSSL/MatrixSSLdescription
Patches
Vulnerability mechanics
References
4- www.openwall.com/lists/oss-security/2019/10/02/2nvdMailing ListThird Party Advisory
- eprint.iacr.org/2011/232.pdfnvdNot Applicable
- minerva.crocs.fi.muni.cznvdProduct
- tches.iacr.org/index.php/TCHES/article/view/7337nvdNot Applicable
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