1. Ubuntu Security Notices
  2. USN-5244-1

USN-5244-1: DBus vulnerability

Publication date

20 January 2022

Overview

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

Releases

Packages

  • dbus - simple interprocess messaging system

Details

Daniel Onaca discovered that DBus contained a use-after-free vulnerability,
caused by the incorrect handling of usernames sharing the same UID. An
attacker could possibly use this issue to cause DBus to crash, resulting
in a denial of service.

Daniel Onaca discovered that DBus contained a use-after-free vulnerability,
caused by the incorrect handling of usernames sharing the same UID. An
attacker could possibly use this issue to cause DBus to crash, resulting
in a denial of service.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
16.04 xenial dbus –  1.10.6-1ubuntu3.6+esm1  
libdbus-1-3 –  1.10.6-1ubuntu3.6+esm1  

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›