=========================================================================Ubuntu Security Notice USN-3994-1
May 27, 2019

gnome-desktop3 vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.04
- Ubuntu 18.10
- Ubuntu 18.04 LTS

Summary:

gnome-desktop could be made to escape the thumbnailer sandbox.

Software Description:
- gnome-desktop3: Introspection data for GnomeDesktop

Details:

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.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 19.04:
  libgnome-desktop-3-17           3.32.1-1ubuntu1.1

Ubuntu 18.10:
  libgnome-desktop-3-17           3.30.1-1ubuntu1.1

Ubuntu 18.04 LTS:
  libgnome-desktop-3-17           3.28.2-0ubuntu1.3

After a standard system update you need to restart your session to make all
the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-3994-1
  CVE-2019-11460

Package Information:
  https://launchpad.net/ubuntu/+source/gnome-desktop3/3.32.1-1ubuntu1.1
  https://launchpad.net/ubuntu/+source/gnome-desktop3/3.30.1-1ubuntu1.1
  https://launchpad.net/ubuntu/+source/gnome-desktop3/3.28.2-0ubuntu1.3