Dovecot could be made to crash or run programs as an administrator if it opened a specially crafted file.
It was discovered that Dovecot incorrectly handled reading certain headers from the index. A local attacker could possibly use this issue to escalate privileges.
1 April 2019
A security issue affects these releases of Ubuntu and its derivatives:
Dovecot could be made to crash or run programs as an administrator if it opened a specially crafted file.
It was discovered that Dovecot incorrectly handled reading certain headers from the index. A local attacker could possibly use this issue to escalate privileges.
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.
Vulmon