Ubuntu Security Update USN-4110-3: Dovecot regression

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Dovecot regression


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

• Ubuntu 19.04
• Ubuntu 18.04 LTS
• Ubuntu 16.04 LTS

Summary


USN-4110-1 introduced a regression in Dovecot.

Software Description

• 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.

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 19.04
dovecot-core - 1:2.3.4.1-1ubuntu2.4
Ubuntu 18.04 LTS
dovecot-core - 1:2.2.33.2-1ubuntu4.5
Ubuntu 16.04 LTS
dovecot-core - 1:2.2.22-1ubuntu2.12

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

• USN-4110-1
• CVE-2019-11500

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