CVE-2009-0051: Zxid

Medium severity, CVSS 5.0. EPSS: 1.2% chance of exploitation in the next 30 days.

ZXID 0.29 and earlier does not properly check the return value from the OpenSSL DSA_verify function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature, a similar vulnerability to CVE-2008-5077.

Affected products

• Zxid Zxid: up to and including 0.29; version 0.1 only; version 0.2 only; version 0.3 only; version 0.4 only; version 0.5 only; …

Published 2009-01-07. Last modified 2026-06-16.