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CVE-2019-13629

CVE-2019-13629

EPSS 1.2%
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.
Affected products
n/a · n/a

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References
https://eprint.iacr.org/2011/232.pdfhttps://minerva.crocs.fi.muni.cz/https://tches.iacr.org/index.php/TCHES/article/view/7337http://www.openwall.com/lists/oss-security/2019/10/02/2