USN-3499-1: Exim vulnerability

USN-3499-1: Exim vulnerability

Ubuntu Security Notice USN-3499-1

29th November, 2017

exim4 vulnerability

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

  • Ubuntu 17.10
  • Ubuntu 17.04

Summary

Exim could be made to crash 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 BDAT data headers.
A remote attacker could possibly use this issue to cause Exim to crash,
resulting in a denial of service.

Update instructions

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.

References

CVE-2017-16944

Source: USN-3499-1: Exim vulnerability

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