VulnerabilityModified
CVE-2019-14317
This allows a remote attacker to compute the long term private key from several hundred DSA signatures via a lattice attack.
MEDIUM 5.3EPSS 1.75%
Does this matter?
Lower severity and a low EPSS score (1.75%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 1.75% probability · 77th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-331
- Affected
- wolfssl/wolfssl
- Source
- cve@mitre.org
References
- https://www.wolfssl.com/docs/security-vulnerabilities/Patch, Vendor Advisory
- https://www.wolfssl.com/docs/security-vulnerabilities/Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.