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Ubuntu 20.04 LTS USN-5244-2 High: DBus Crash Denial of Service

ubuntu
Calendar Grey May 9, 2022
Dist Ubuntu Esm H88
A security flaw in DBus on Ubuntu could result in system crash upon receiving harmful data; it's crucial to keep the system up to date for protection.
DBus could be made to crash if it received specially crafted input.

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.

Topics%20covered

Topics Covered

security advisory denial of service high severity system update ubuntu input handling dbus crash

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

  https://ubuntu.com/security/notices/USN-5244-2

  https://ubuntu.com/security/notices/USN-5244-1

  CVE-2020-35512

May 09, 2022

Topics%20covered

Topics Covered

security advisory denial of service high severity system update ubuntu input handling dbus crash

Package Information

  https://launchpad.net/ubuntu/+source/dbus/1.12.16-2ubuntu2.2
  https://launchpad.net/ubuntu/+source/dbus/1.12.2-1ubuntu1.3

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