=========================================================================Ubuntu Security Notice USN-4015-1
June 11, 2019

dbus vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.04
- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

DBus could allow unintended access to services.

Software Description:
- dbus: simple interprocess messaging system

Details:

Joe Vennix discovered that DBus incorrectly handled DBUS_COOKIE_SHA1
authentication. A local attacker could possibly use this issue to bypass
authentication and connect to DBus servers with elevated privileges.

Update instructions:

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

Ubuntu 19.04:
  dbus                            1.12.12-1ubuntu1.1
  libdbus-1-3                     1.12.12-1ubuntu1.1

Ubuntu 18.10:
  dbus                            1.12.10-1ubuntu2.1
  libdbus-1-3                     1.12.10-1ubuntu2.1

Ubuntu 18.04 LTS:
  dbus                            1.12.2-1ubuntu1.1
  libdbus-1-3                     1.12.2-1ubuntu1.1

Ubuntu 16.04 LTS:
  dbus                            1.10.6-1ubuntu3.4
  libdbus-1-3                     1.10.6-1ubuntu3.4

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-4015-1
  CVE-2019-12749

Package Information:
  https://launchpad.net/ubuntu/+source/dbus/1.12.12-1ubuntu1.1
  https://launchpad.net/ubuntu/+source/dbus/1.12.10-1ubuntu2.1
  https://launchpad.net/ubuntu/+source/dbus/1.12.2-1ubuntu1.1
  https://launchpad.net/ubuntu/+source/dbus/1.10.6-1ubuntu3.4