CVE-2019-14317

wolfSSL and wolfCrypt 4.1.0 and earlier (formerly known as CyaSSL) generate biased DSA nonces

published December 11, 2019

CVSS
—
EPSS
2%
Percentile
77.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01755 · 77.8th percentile
Published
2019-12-11T17:30Z
EPSS history
Timeline
  • 11 DEC 17:30Z
    wolfSSL and wolfCrypt 4.1.0 and earlier (formerly known as CyaSSL) generate biased DSA nonces
    cvelistv5