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AUSCERT External Security Bulletin Redistribution
USN-4141-1: Exim vulnerability
30 September 2019
AusCERT Security Bulletin Summary
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2019-16928
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running exim4 check for an updated version of the software for their
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USN-4141-1: Exim vulnerability
28 September 2019
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.04
Exim could be made to crash or run programs if it received specially crafted
o exim4 - Exim is a mail transport agent
It was discovered that Exim incorrectly handled certain string operations. A
remote attacker could use this issue to cause Exim to crash, resulting in a
denial of service, or possibly execute arbitrary code.
The problem can be corrected by updating your system to the following package
exim4-daemon-heavy - 4.92-4ubuntu1.4
exim4-daemon-light - 4.92-4ubuntu1.4
To update your system, please follow these instructions: https://
In general, a standard system update will make all the necessary changes.
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