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USN-4398-2: DBus vulnerability

16 June 2020

DBus could be made to crash if it received specially crafted input.



  • dbus - simple interprocess messaging system


USN-4398-1 fixed a vulnerability in DBus. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

Kevin Backhouse discovered that DBus incorrectly handled file descriptors.
A local attacker could possibly use this issue to cause DBus to crash,
resulting in a denial of service.

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-4398-1: dbus-user-session, dbus, dbus-x11, libdbus-1-3-udeb, libdbus-1-3, dbus-udeb, libdbus-1-dev, dbus-1-doc, dbus-tests