USN-6611-1: Exim vulnerability

29 January 2024

Exim could be made to bypass an SPF protection mechanism if it received a specially crafted request.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Releases

Packages

  • exim4 - Exim is a mail transport agent

Details

It was discovered that Exim incorrectly handled certain requests.
A remote attacker could possibly use a published exploitation technique
to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass
of an SPF protection mechanism.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 23.10
Ubuntu 22.04
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

In general, a standard system update will make all the necessary changes.

References