PT-2019-13604 · Wolfssl · Wolfssl+1

Ján Jančár · Published 2019-12-11 · Updated 2021-07-21 · CVE-2019-14317

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions wolfSSL and wolfCrypt versions 4.1.0 and earlier

Description The issue allows a remote attacker to compute the long term private key from several hundred DSA signatures via a lattice attack. This occurs because the dsa.c file fixes two bits of the generated nonces, leading to biased DSA nonces.

Recommendations For versions 4.1.0 and earlier, consider updating to a version that generates unbiased DSA nonces to prevent lattice attacks. As a temporary workaround, restrict the use of DSA signatures until a patch is available.

Fix

Weakness Enumeration

CWE-331

Related Identifiers

CVE-2019-14317

Affected Products

Wolfcrypt

Wolfssl

References · 8

• https://ubuntu.com/security/CVE-2019-14317 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-14317 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2019-14317 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-14317 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-14317 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-14317 · Vendor Advisory
• https://wolfssl.com/docs/security-vulnerabilities · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-14317 · Security Note