The remote host is missing an update to udev announced via advisory USN-758-1.
Details follow:
Sebastian Krahmer discovered that udev did not correctly validate netlink message senders. A local attacker could send specially crafted messages to udev in order to gain root privileges. (CVE-2009-1185)
Sebastian Krahmer discovered a buffer overflow in the path encoding routines in udev. A local attacker could exploit this to crash udev, leading to a denial of service. (CVE-2009-1186)
Solution: The problem can be corrected by upgrading your system to the following package versions:
Ubuntu 6.06 LTS: udev 079-0ubuntu35.1
Ubuntu 7.10: udev 113-0ubuntu17.2
Ubuntu 8.04 LTS: udev 117-8ubuntu0.2
Ubuntu 8.10: udev 124-9ubuntu0.2
After a standard system upgrade you need to reboot your computer to effect the necessary changes.