USN-3961-1: Dovecot vulnerabilities

30 April 2019

dovecot vulnerabilities

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

  • Ubuntu 19.04
  • Ubuntu 18.10

Summary

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

Software Description

  • dovecot - IMAP and POP3 email server

Details

It was discovered that the Dovecot Submission login service incorrectly handled certain operations. A remote attacker could possibly use this issue to cause Dovecot to crash, resulting in a denial of service.

Update instructions

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

Ubuntu 19.04
dovecot-core - 1:2.3.4.1-1ubuntu2.2
dovecot-submissiond - 1:2.3.4.1-1ubuntu2.2
Ubuntu 18.10
dovecot-core - 1:2.3.2.1-1ubuntu3.4
dovecot-submissiond - 1:2.3.2.1-1ubuntu3.4

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