[USN-4110-2] Dovecot vulnerability

Leonidas S. Barbosa leo.barbosa at canonical.com
Wed Aug 28 14:54:49 UTC 2019

Ubuntu Security Notice USN-4110-2
August 28, 2019

dovecot vulnerability

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

- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM


Dovecot could be made to crash or execute arbitrary code if it received
a specially crafted data.

Software Description:
- dovecot: IMAP and POP3 email server


USN-4110-1 fixed a vulnerability in Dovecot. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

 Nick Roessler and Rafi Rubin discovered that Dovecot incorrectly
 handled certain data. An attacker could possibly use this issue
 to cause a denial of service or execute arbitrary code.

Update instructions:

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

Ubuntu 14.04 ESM:
  dovecot-core                    1:2.2.9-1ubuntu2.6+esm1

Ubuntu 12.04 ESM:
  dovecot-core                    1:2.0.19-0ubuntu2.7

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

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