cpanel servers vulnerable by default
try to login (telnet?) to port 6666 of your server
do you get >> Melange Chat Server (Version 1.10), Apr-25-1999?
this program has a bug
i didn't investigate it very much, but it's possible to change the EIP (pointer to program code) to somewhere else, maybe getting to run some program the ab(user) wants
as far as i went, that's a not severe vulnerability, since this program is runned by 'nobody' user
not a big deal, but yet a vuln
http://www.securityfocus.com/bid/6477/discussion/
no patch is available yet, so if you think you can be affected by that, disable connections to port 6666 to your server
