[USN-3258-1] Dovecot vulnerability

Tyler Hicks tyhicks at canonical.com
Mon Apr 10 23:10:41 UTC 2017

Ubuntu Security Notice USN-3258-1
April 10, 2017

dovecot vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.10
- Ubuntu 16.04 LTS


Dovecot could be made to crash if it received specially crafted input.

Software Description:
- dovecot: 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.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.10:
  dovecot-core                    1:2.2.24-1ubuntu1.2

Ubuntu 16.04 LTS:
  dovecot-core                    1:2.2.22-1ubuntu2.3

In general, a standard system update will make all the necessary changes.


Package Information:

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