USN-3499-1: Exim vulnerability

Publication date

29 November 2017

Overview

Exim could be made to crash if it received specially crafted network traffic.


Packages

  • exim4 - Exim is a mail transport agent

Details

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.

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.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
17.10 artful exim4-daemon-heavy –  4.89-5ubuntu1.2
exim4-daemon-light –  4.89-5ubuntu1.2
17.04 zesty exim4-daemon-heavy –  4.88-5ubuntu1.3
exim4-daemon-light –  4.88-5ubuntu1.3

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