A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 19.04
- Ubuntu 18.10
- Ubuntu 18.04 LTS
gnome-desktop could be made to escape the thumbnailer sandbox.
- gnome-desktop3: Introspection data for GnomeDesktop
It was discovered that gnome-desktop incorrectly confined thumbnailers. If
a user were tricked into downloading a malicious image file, a remote
attacker could possibly combine this issue with another vulnerability to
escape the sandbox and execute arbitrary code.
The problem can be corrected by updating your system to the following