[USN-3565-1] Exim vulnerability

Marc Deslauriers marc.deslauriers at canonical.com
Mon Feb 12 16:32:57 UTC 2018

Ubuntu Security Notice USN-3565-1
February 12, 2018

exim4 vulnerability

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

- Ubuntu 17.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS


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


Meh Chang discovered that Exim incorrectly handled memory in certain
decoding operations. A remote attacker could use this issue to cause Exim
to crash, resulting in a denial of service, or possibly execute arbitrary

Update instructions:

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

Ubuntu 17.10:
  exim4-daemon-heavy              4.89-5ubuntu1.3
  exim4-daemon-light              4.89-5ubuntu1.3

Ubuntu 16.04 LTS:
  exim4-daemon-heavy              4.86.2-2ubuntu2.3
  exim4-daemon-light              4.86.2-2ubuntu2.3

Ubuntu 14.04 LTS:
  exim4-daemon-heavy              4.82-3ubuntu2.4
  exim4-daemon-light              4.82-3ubuntu2.4

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


Package Information:

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