USN-1176-1: DBus vulnerability

26 July 2011

dbus vulnerability

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

  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS
  • Ubuntu 8.04 LTS


DBus could be made to crash if it processed a specially crafted message.

Software Description

  • dbus - simple interprocess messaging system


It was discovered that DBus did not properly validate the byte order of messages under certain circumstances. An attacker could exploit this to cause a denial of service via application crash or potentially obtain access to sensitive information.

Update instructions

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

Ubuntu 11.04
dbus - 1.4.6-1ubuntu6.1
Ubuntu 10.10
dbus - 1.4.0-0ubuntu1.3
Ubuntu 10.04 LTS
dbus - 1.2.16-2ubuntu4.3
Ubuntu 8.04 LTS
dbus - 1.1.20-1ubuntu3.5

To update your system, please follow these instructions:

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