medium5.9
CVE-2019-13629
MatrixSSL 4.2.1 and earlier contains a timing side channel in ECDSA signature generation.
Impact
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
| Vendor | Product | Affected versions |
|---|---|---|
| Matrixssl | Matrixssl | through 4.2.1 |
Weakness classification
References
- NVD record
- CVE.org record
- http://www.openwall.com/lists/oss-security/2019/10/02/2
- https://eprint.iacr.org/2011/232.pdf
- https://minerva.crocs.fi.muni.cz/
- https://tches.iacr.org/index.php/TCHES/article/view/7337
- http://www.openwall.com/lists/oss-security/2019/10/02/2
- https://eprint.iacr.org/2011/232.pdf
- https://minerva.crocs.fi.muni.cz/
- https://tches.iacr.org/index.php/TCHES/article/view/7337