[USN-5244-1] DBus vulnerability

[Camila Camargo de Matos]

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Ubuntu Security Notice USN-5244-1
January 20, 2022

dbus vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 ESM

Summary:

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

Software Description:
- 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.

Update instructions:

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

Ubuntu 16.04 ESM:
dbus 1.10.6-1ubuntu3.6+esm1
libdbus-1-3 1.10.6-1ubuntu3.6+esm1

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

References:
https://ubuntu.com/security/notices/USN-5244-1
CVE-2020-35512

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