Bugzilla CAS Plugin
After the installation of the plugin you can use CAS as your authentication server. The plugin adds a second logout button, named "Logout (SSO)", to Bugzilla, because the original one only logs you out of Bugzilla, not out of your CAS based SingleSignOn system.
You can download the plugin here.
Simply copy the files into the "extensions" directory of your Bugzilla installation.
In the "Administration > Parameters > User Authentication" screen you have to set "user_info_class" to "CAS". The plugin can be configured in the "Administration > Parameters > CAS" screen.
There you have to provide the following mandantory information: