DHCP could be made to crash if it received specially crafted network traffic.
Markus Hietava discovered that the DHCP server incorrectly handled certain malformed client identifiers. A remote attacker could use this issue to cause DHCP to crash, resulting in a denial of service. (CVE-2012-3571)
26 July 2012
A security issue affects these releases of Ubuntu and its derivatives:
DHCP could be made to crash if it received specially crafted network traffic.
Markus Hietava discovered that the DHCP server incorrectly handled certain malformed client identifiers. A remote attacker could use this issue to cause DHCP to crash, resulting in a denial of service. (CVE-2012-3571)
Glen Eustace discovered that the DHCP server incorrectly handled memory. A remote attacker could use this issue to cause DHCP to crash, resulting in a denial of service. (CVE-2012-3954)
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.