What’s Vulnerable › Vulnerabilities

CVE-2019-14317

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-12-11 · updated 2026-06-17
• Weakness: CWE-331

Description

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: before 4.2.0 — fixed in 4.2.0

How to fix

Upgrade to a fixed version: wolfSSL 4.2.0. Check the vendor advisory for mitigations.

References

• https://www.wolfssl.com/docs/security-vulnerabilities/
• https://www.wolfssl.com/docs/security-vulnerabilities/

Get alerted when CVE-2019-14317 or the next vulnerability affects your stack