USN-3951-1: Dovecot vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 19.04
- Ubuntu 18.10
Dovecot could be made to crash if it received specially crafted network
- dovecot – IMAP and POP3 email server
It was discovered that the Dovecot JSON encoder incorrectly handled certain
invalid UTF-8 characters. A remote attacker could possibly use this issue
to cause Dovecot to repeatedly crash, resulting in a denial of service.
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.