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USN-4015-2: DBus vulnerability

12 June 2019

DBus could allow unintended access to services.



  • dbus - simple interprocess messaging system


USN-4015-1 fixed a vulnerability in DBus. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory 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 14.04
Ubuntu 12.04

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


Related notices

  • USN-4015-1: libdbus-1-3-udeb, dbus-tests, dbus-x11, libdbus-1-3, dbus-1-doc, libdbus-1-dev, dbus, dbus-udeb, dbus-user-session