USN-4141-1: Exim vulnerability

28 September 2019

exim4 vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 19.04

Summary

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

Software Description

  • exim4 - Exim is a mail transport agent

Details

It was discovered that Exim incorrectly handled certain string operations. A remote attacker could use this issue to cause Exim to crash, resulting in a denial of service, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 19.04
exim4-daemon-heavy - 4.92-4ubuntu1.4
exim4-daemon-light - 4.92-4ubuntu1.4

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.

References