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USN-4398-1: DBus vulnerability

16 June 2020

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



  • dbus - simple interprocess messaging system


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 20.04
Ubuntu 19.10
Ubuntu 18.04
Ubuntu 16.04

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


Related notices

  • USN-4398-2: libdbus-1-3, dbus, libdbus-1-dev, dbus-1-doc, dbus-x11