USN-3499-1: Exim vulnerability
Ubuntu Security Notice USN-3499-1
29th November, 2017
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 17.10
- Ubuntu 17.04
Exim could be made to crash if it received specially crafted network traffic.
- exim4 - Exim is a mail transport agent
It was discovered that Exim incorrectly handled certain BDAT data headers.
A remote attacker could possibly use this issue to cause Exim to crash,
resulting in a denial of service.
The problem can be corrected by updating your system to the following package version:
- Ubuntu 17.10:
- exim4-daemon-heavy 4.89-5ubuntu1.2
- exim4-daemon-light 4.89-5ubuntu1.2
- Ubuntu 17.04:
- exim4-daemon-heavy 4.88-5ubuntu1.3
- exim4-daemon-light 4.88-5ubuntu1.3
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.