Exim could be made to run programs if it received specially crafted network traffic.
It was discovered that Exim incorrectly handled DKIM DNS decoding. This flaw could allow a remote attacker to execute arbitrary code.
26 October 2012
A security issue affects these releases of Ubuntu and its derivatives:
Exim could be made to run programs if it received specially crafted network traffic.
It was discovered that Exim incorrectly handled DKIM DNS decoding. This flaw could allow a remote attacker to execute arbitrary code.
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.