[USN-5244-2] DBus vulnerability


========================================================================== Ubuntu Security Notice USN-5244-2 May 09, 2022
dbus vulnerability ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 20.04 LTS – Ubuntu 18.04 LTS
Summary:
DBus could be made to crash if it received specially crafted input.
Software Description: – 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.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04 LTS:   dbus                            1.12.16-2ubuntu2.2   libdbus-1-3                     1.12.16-2ubuntu2.2
Ubuntu 18.04 LTS:   dbus                            1.12.2-1ubuntu1.3   libdbus-1-3                     1.12.2-1ubuntu1.3
After a standard system update you need to reboot your computer to make all the necessary changes.
References:   ubuntu.com/security/notices/USN-5244-2   ubuntu.com/security/notices/USN-5244-1   CVE-2020-35512
Package Information:   launchpad.net/ubuntu/+source/dbus/1.12.16-2ubuntu2.2   launchpad.net/ubuntu/+source/dbus/1.12.2-1ubuntu1.3