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Ubuntu Security Notice USN-4124-1

Ubuntu Security Notice USN-4124-1
Posted Sep 6, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4124-1 - It was discovered that Exim incorrectly handled certain decoding operations. A remote attacker could possibly use this issue to execute arbitrary commands.

tags | advisory, remote, arbitrary
systems | linux, ubuntu
advisories | CVE-2019-15846
MD5 | 80829915cb70bfff960bd00382ae0fcb

Ubuntu Security Notice USN-4124-1

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-4124-1
September 06, 2019

exim4 vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.04
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Exim could be made to run programs as an administrator 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 decoding
operations. A remote attacker could possibly use this issue to execute
arbitrary commands.

Update instructions:

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

Ubuntu 19.04:
exim4-daemon-heavy 4.92-4ubuntu1.3
exim4-daemon-light 4.92-4ubuntu1.3

Ubuntu 18.04 LTS:
exim4-daemon-heavy 4.90.1-1ubuntu1.4
exim4-daemon-light 4.90.1-1ubuntu1.4

Ubuntu 16.04 LTS:
exim4-daemon-heavy 4.86.2-2ubuntu2.5
exim4-daemon-light 4.86.2-2ubuntu2.5

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

References:
https://usn.ubuntu.com/4124-1
CVE-2019-15846, https://launchpad.net/bugs/1843041

Package Information:
https://launchpad.net/ubuntu/+source/exim4/4.92-4ubuntu1.3
https://launchpad.net/ubuntu/+source/exim4/4.90.1-1ubuntu1.4
https://launchpad.net/ubuntu/+source/exim4/4.86.2-2ubuntu2.5
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