CVE-2019-14317
5.3
MEDIUM
CVSS 3.1
EPSS 0.39%
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.
How to fix CVE-2019-14317
To remediate CVE-2019-14317, upgrade the affected package to a fixed version below.
- Debian/wolfssl—upgrade to 4.2.0+dfsg-1 or later
Is CVE-2019-14317 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 4.2.0+dfsg-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |