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USN-5244-2: DBus vulnerability

9 May 2022

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

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Releases

Packages

  • dbus - simple interprocess messaging system

Details

USN-5244-1 fixed a vulnerability in DBus. This update provides
the corresponding update for Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.

Original advisory 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.

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.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 20.04
Ubuntu 18.04

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

References

Related notices

  • USN-5244-1: libdbus-1-dev, dbus, dbus-1-doc, dbus-user-session, libdbus-1-3, dbus-tests, dbus-x11