USN-4015-1: DBus vulnerability

11 June 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


DBus could allow unintended access to services.

Software Description

  • dbus - simple interprocess messaging system


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

To update your system, please follow these instructions:

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