[USN-3881-2] Dovecot vulnerability

Leonidas S. Barbosa leo.barbosa at canonical.com
Tue Feb 5 16:41:52 UTC 2019

Ubuntu Security Notice USN-3881-2
February 05, 2019

dovecot vulnerability

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

- Ubuntu 12.04 ESM


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

Software Description:
- dovecot: IMAP and POP3 email server


USN-3881-1 fixed a vulnerability in Dovecot. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory 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 12.04 ESM:
  dovecot-core                    1:2.0.19-0ubuntu2.6

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

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