CVE-2019-14317: wolfSSL

Medium severity, CVSS 5.3. EPSS: 1.8% chance of exploitation in the next 30 days.

wolfSSL and wolfCrypt 4.1.0 and earlier (formerly known as CyaSSL) generate biased DSA nonces. This allows a remote attacker to compute the long term private key from several hundred DSA signatures via a lattice attack. The issue occurs because dsa.c fixes two bits of the generated nonces.

Affected products

• wolfSSL wolfSSL: before 4.2.0 (fixed in 4.2.0)

Published 2019-12-11. Last modified 2026-06-17.