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AUSCERT External Security Bulletin Redistribution
USN-4124-1: Exim vulnerability
9 September 2019
AusCERT Security Bulletin Summary
Operating System: Ubuntu
Impact/Access: Root Compromise -- Remote/Unauthenticated
CVE Names: CVE-2019-15846
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USN-4124-1: Exim vulnerability
6 September 2019
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.04
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Exim could be made to run programs as an administrator if it received specially
crafted network traffic.
o exim4 - Exim is a mail transport agent
It was discovered that Exim incorrectly handled certain decoding operations. A
remote attacker could possibly use this issue to execute arbitrary commands.
The problem can be corrected by updating your system to the following package
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
To update your system, please follow these instructions: https://
In general, a standard system update will make all the necessary changes.
o LP: 1843041
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