USN-3258-1: Dovecot vulnerability

Ubuntu Security Notice USN-3258-1

10th April, 2017

dovecot vulnerability

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

  • Ubuntu 16.10
  • Ubuntu 16.04 LTS

Summary

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

Software description

  • dovecot - IMAP and POP3 email server

Details

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 version:

Ubuntu 16.10:
dovecot-core 1:2.2.24-1ubuntu1.2
Ubuntu 16.04 LTS:
dovecot-core 1:2.2.22-1ubuntu2.3

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

CVE-2017-2669