6 November 2019
A security issue affects these releases of Ubuntu and its derivatives:
The system could be made to expose sensitive information.
- rygel – GNOME UPnP/DLNA services
It was discovered that the Rygel package automatically started the daemon
by default in user sessions. In certain environments, this resulted in
media being shared contrary to expectations.
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 your session to make
all the necessary changes.