CVE-2009-0161: Apple Mac OS X

Medium severity, CVSS 6.4. EPSS: 2.3% chance of exploitation in the next 30 days.

The OpenSSL::OCSP module for Ruby in Apple Mac OS X 10.5 before 10.5.7 misinterprets an unspecified invalid response as a successful OCSP certificate validation, which might allow remote attackers to spoof certificate authentication via a revoked certificate.

Affected products

• Apple Mac OS X: version 10.5.0 only; version 10.5.1 only; version 10.5.2 only; version 10.5.3 only; version 10.5.4 only; version 10.5.5 only; …
• Apple Mac OS X Server: version 10.4.11 only; version 10.5.0 only; version 10.5.1 only; version 10.5.2 only; version 10.5.3 only; version 10.5.4 only; …

Published 2009-05-13. Last modified 2026-06-16.