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Ubuntu Security Notice USN-3565-1

Ubuntu Security Notice USN-3565-1
Posted Feb 12, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3565-1 - 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.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2018-6789
MD5 | a5e7763e74dc8b6d7403bba290d678e9

Ubuntu Security Notice USN-3565-1

Change Mirror Download
==========================================================================
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

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 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.

References:
https://www.ubuntu.com/usn/usn-3565-1
CVE-2018-6789

Package Information:
https://launchpad.net/ubuntu/+source/exim4/4.89-5ubuntu1.3
https://launchpad.net/ubuntu/+source/exim4/4.86.2-2ubuntu2.3
https://launchpad.net/ubuntu/+source/exim4/4.82-3ubuntu2.4


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