=========================================================================Ubuntu Security Notice USN-1576-1
September 20, 2012

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

- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS

Summary:

DBus could be made to run programs as an administrator.

Software Description:
- dbus: simple interprocess messaging system

Details:

Sebastian Krahmer discovered that DBus incorrectly handled environment
variables when running with elevated privileges. A local attacker could
possibly exploit this flaw with a setuid binary and gain root privileges.

Update instructions:

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

Ubuntu 12.04 LTS:
  dbus                            1.4.18-1ubuntu1.1
  libdbus-1-3                     1.4.18-1ubuntu1.1

Ubuntu 11.10:
  dbus                            1.4.14-1ubuntu1.1
  libdbus-1-3                     1.4.14-1ubuntu1.1

Ubuntu 11.04:
  dbus                            1.4.6-1ubuntu6.2
  libdbus-1-3                     1.4.6-1ubuntu6.2

Ubuntu 10.04 LTS:
  dbus                            1.2.16-2ubuntu4.5
  libdbus-1-3                     1.2.16-2ubuntu4.5

Ubuntu 8.04 LTS:
  dbus                            1.1.20-1ubuntu3.7
  libdbus-1-3                     1.1.20-1ubuntu3.7

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-1576-1
  CVE-2012-3524

Package Information:
  https://launchpad.net/ubuntu/+source/dbus/1.4.18-1ubuntu1.1
  https://launchpad.net/ubuntu/+source/dbus/1.4.14-1ubuntu1.1
  https://launchpad.net/ubuntu/+source/dbus/1.4.6-1ubuntu6.2
  https://launchpad.net/ubuntu/+source/dbus/1.2.16-2ubuntu4.5
  https://launchpad.net/ubuntu/+source/dbus/1.1.20-1ubuntu3.7