HP Security Bulletin – A potential security vulnerability has been identified with HP-UX running rpc.yppasswdd. The vulnerability could be exploited remotely to create a denial of service (DoS).
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/61977/SSRT071333.txt
Source: https://packetstormsecurity.com/files/61977/HP-Security-Bulletin-2007-13.33.html