Ubuntu Security Notice USN-3258-1
10th April, 2017
A security issue affects these releases of Ubuntu and its
- Ubuntu 16.10
- Ubuntu 16.04 LTS
Dovecot could be made to crash if it received specially crafted input.
– IMAP and POP3 email server
It was discovered that Dovecot incorrectly handled some usernames. An attacker
could possibly use this issue to cause Dovecot to hang or crash, resulting in a
denial of service.
The problem can be corrected by updating your system to the following
To update your system, please follow these instructions:
In general, a standard system update will make all the necessary changes.