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USN-1107-1: x11-xserver-utils vulnerability

06 April 2011

An attacker could send crafted input to xrdb and cause it to run programs as root.




Sebastian Krahmer discovered that the xrdb utility incorrectly filtered
crafted hostnames. An attacker could use this flaw with a malicious
DHCP server or with a remote xdmcp login and execute arbitrary code,
resulting in root privilege escalation.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 9.10
Ubuntu 8.04
Ubuntu 10.10
Ubuntu 10.04

After a standard system update you need to reboot your computer to make
all the necessary changes.