Ubuntu 20.04 LTS: USN-4398-1 Moderate: DBus Denial Of Service Risk

ubuntu

June 16, 2020

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

Summary

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

Software Description:

- dbus: simple interprocess messaging system

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.

Topics Covered

security advisory denial of service Ubuntu local attack DBus

Update Instructions

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

Ubuntu 20.04 LTS:
  dbus                            1.12.16-2ubuntu2.1
  libdbus-1-3                     1.12.16-2ubuntu2.1

Ubuntu 19.10:
  dbus                            1.12.14-1ubuntu2.1
  libdbus-1-3                     1.12.14-1ubuntu2.1

Ubuntu 18.04 LTS:
  dbus                            1.12.2-1ubuntu1.2
  libdbus-1-3                     1.12.2-1ubuntu1.2

Ubuntu 16.04 LTS:
  dbus                            1.10.6-1ubuntu3.6
  libdbus-1-3                     1.10.6-1ubuntu3.6

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