Ubuntu alert USN-5244-1 (dbus)

From:
             
 
Camila Camargo de Matos <camila.camargodematos@canonical.com>
To:
             
 
ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-5244-1] DBus vulnerability
Date:
             
 
Thu, 20 Jan 2022 17:25:07 -0300
Message-ID:
             
 
<29531f45-36d6-7c2d-bd1f-a459b9deec37@canonical.com>
==========================================================================
Ubuntu Security Notice USN-5244-1
January 20, 2022

dbus vulnerability
==========================================================================

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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