Summary
The remote host is missing an update to fglrx-installer announced via advisory USN-721-1.
Solution
The problem can be corrected by upgrading your system to the following package versions:
Ubuntu 8.10:
xorg-driver-fglrx 2:8.543-0ubuntu4.1
After a standard system upgrade you need to restart your session to effect the necessary changes.
https://secure1.securityspace.com/smysecure/catid.html?in=USN-721-1
Insight
Marko Lindqvist discovered that the fglrx installer created an unsafe LD_LIBRARY_PATH on 64bit systems. If a user were tricked into downloading specially crafted libraries and running commands in the same directory, a remote attacker could execute arbitrary code with user privileges.
