DHCP could be made to crash if it received specially crafted network traffic.
It was discovered that the DHCP server incorrectly handled certain malformed packets when configured to evaluate regular expressions. A remote attacker could use this issue to cause DHCP to crash, resulting in a denial of service.
15 December 2011
A security issue affects these releases of Ubuntu and its derivatives:
DHCP could be made to crash if it received specially crafted network traffic.
It was discovered that the DHCP server incorrectly handled certain malformed packets when configured to evaluate regular expressions. A remote attacker could use this issue to cause DHCP to crash, resulting in a denial of service.
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
Vulmon