USN-4110-1: Dovecot vulnerability

28 August 2019

dovecot vulnerability

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

  • Ubuntu 19.04
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS

Summary

Dovecot could be made to crash or execute arbitrary code if it received a specially crafted data.

Software Description

  • dovecot - IMAP and POP3 email server

Details

Nick Roessler and Rafi Rubin discovered that Dovecot incorrectly handled certain data. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code.

Update instructions

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

Ubuntu 19.04
dovecot-core - 1:2.3.4.1-1ubuntu2.3
Ubuntu 18.04 LTS
dovecot-core - 1:2.2.33.2-1ubuntu4.4
Ubuntu 16.04 LTS
dovecot-core - 1:2.2.22-1ubuntu2.11

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