Irssi could be made to crash or execute arbitrary code if it received a specially crafted CAP request.
It was discovered that Irssi incorrectly handled certain CAP requests. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code.
3 September 2019
A security issue affects these releases of Ubuntu and its derivatives:
Irssi could be made to crash or execute arbitrary code if it received a specially crafted CAP request.
It was discovered that Irssi incorrectly handled certain CAP requests. 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.
After a standard system update you need to restart Irssi to make all the necessary changes.
Vulmon