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AUSCERT External Security Bulletin Redistribution
30 November 2017
AusCERT Security Bulletin Summary
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2017-16944
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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Ubuntu Security Notice USN-3499-1
November 29, 2017
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 17.10
- - Ubuntu 17.04
Exim could be made to crash if it received specially crafted network
- - exim4: Exim is a mail transport agent
It was discovered that Exim incorrectly handled certain BDAT data headers.
A remote attacker could possibly use this issue to cause Exim to crash,
resulting in a denial of service.
The problem can be corrected by updating your system to the following
In general, a standard system update will make all the necessary changes.
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