CVE-2009-0161
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.
Date published : 2009-05-13
http://lists.apple.com/archives/security-announce/2009/May/msg00002.html