Ubuntu Security Notice USN-3493-1
27th November, 2017
A security issue affects these releases of Ubuntu and its
- Ubuntu 17.10
- Ubuntu 17.04
Exim could be made to crash or run programs if it received specially
crafted network traffic.
– Exim is a mail transport agent
It was discovered that Exim incorrectly handled memory in the ESMTP
CHUNKING extension. A remote attacker could use this issue to cause Exim to
crash, resulting in a denial of service, or possibly execute arbitrary
code. The default compiler options for affected releases should reduce the
vulnerability to a denial of service.
The problem can be corrected by updating your system to the following
- Ubuntu 17.10:
- Ubuntu 17.04:
To update your system, please follow these instructions:
In general, a standard system update will make all the necessary changes.