1. Ubuntu Security Notices
  2. USN-3881-1

USN-3881-1: Dovecot vulnerability

Publication date

5 February 2019

Overview

Dovecot could be made to expose sensitive information over the network.

Releases

Packages

  • dovecot - IMAP and POP3 email server

Details

It was discovered that Dovecot incorrectly handled client certificates. A
remote attacker in possession of a valid certificate with an empty username
field could possibly use this issue to impersonate other users.

It was discovered that Dovecot incorrectly handled client certificates. A
remote attacker in possession of a valid certificate with an empty username
field could possibly use this issue to impersonate other users.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
18.10 cosmic dovecot-core –  1:2.3.2.1-1ubuntu3.1
18.04 bionic dovecot-core –  1:2.2.33.2-1ubuntu4.2
16.04 xenial dovecot-core –  1:2.2.22-1ubuntu2.9
14.04 trusty dovecot-core –  1:2.2.9-1ubuntu2.5

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References

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