USN-4110-4: Dovecot regression

Releases

• Ubuntu 14.04 ESM
• Ubuntu 12.04

Packages

• dovecot - IMAP and POP3 email server

Details

USN-4110-1 fixed a vulnerability in Dovecot. The update introduced
a regression causing a wrong check. This update fixes the problem for
Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

We apologize for the inconvenience.

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

• dovecot-core - 1:2.2.9-1ubuntu2.6+esm2

Ubuntu 12.04

• dovecot-core - 1:2.0.19-0ubuntu2.8

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

References

• CVE-2019-11500

Related notices

• USN-4110-3
• USN-4110-1
• USN-4110-2