USN-3881-1: Dovecot vulnerability
dovecot vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary
Dovecot could be made to expose sensitive information over the network.
Software Description
- 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.
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 18.10
- dovecot-core – 1:2.3.2.1-1ubuntu3.1
- Ubuntu 18.04 LTS
- dovecot-core – 1:2.2.33.2-1ubuntu4.2
- Ubuntu 16.04 LTS
- dovecot-core – 1:2.2.22-1ubuntu2.9
- Ubuntu 14.04 LTS
- dovecot-core – 1:2.2.9-1ubuntu2.5
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
Source: USN-3881-1: Dovecot vulnerability
