Your submission was sent successfully! Close

USN-3881-1: Dovecot vulnerability

5 February 2019

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



  • dovecot - IMAP and POP3 email server


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

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

Ubuntu 18.10
Ubuntu 18.04
Ubuntu 16.04
Ubuntu 14.04

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


Related notices