HP Security Bulletin – A potential security vulnerability has been identified with Apache running on HP-UX where the vulnerability could be exploited remotely to bypass client-based certificate authentication and gain unauthorized access to certain web pages.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/40511/SSRT051043.txt
Source: https://packetstormsecurity.com/files/40511/HP-Security-Bulletin-2005-10.43.html