USN-3565-1: Exim vulnerability
Ubuntu Security Notice USN-3565-1
12th February, 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
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
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
code.
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 17.10:
-
exim4-daemon-heavy
4.89-5ubuntu1.3
-
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
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
Source: USN-3565-1: Exim vulnerability
