Dovecot could be made to crash or execute arbitrary code if it received a specially crafted data.
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.
28 August 2019
A security issue affects these releases of Ubuntu and its derivatives:
Dovecot could be made to crash or execute arbitrary code if it received a specially crafted data.
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.
The problem can be corrected by updating your system to the following package versions:
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.