Ubuntu: 1576-2: DBus regressions
Posted by Benjamin D. Thomas   
Ubuntu DBus could be made to run programs as an administrator.
==========================================================================
Ubuntu Security Notice USN-1576-2
October 04, 2012

dbus regressions
==========================================================================

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:

USN-1576-1 fixed vulnerabilities in DBus. The update caused a regression
for certain services launched from the activation helper, and caused an
unclean shutdown on upgrade. This update fixes the problem.

We apologize for the inconvenience.

Original advisory 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                            1.4.18-1ubuntu1.3
  libdbus-1-3                     1.4.18-1ubuntu1.3

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

Ubuntu 11.04:
  dbus                            1.4.6-1ubuntu6.4
  libdbus-1-3                     1.4.6-1ubuntu6.4

Ubuntu 10.04 LTS:
  dbus                            1.2.16-2ubuntu4.7
  libdbus-1-3                     1.2.16-2ubuntu4.7

Ubuntu 8.04 LTS:
  dbus                            1.1.20-1ubuntu3.9
  libdbus-1-3                     1.1.20-1ubuntu3.9

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

References:
  http://www.ubuntu.com/usn/usn-1576-2
  http://www.ubuntu.com/usn/usn-1576-1
  CVE-2012-3524

Package Information:
  https://launchpad.net/ubuntu/+source/dbus/1.4.18-1ubuntu1.3
  https://launchpad.net/ubuntu/+source/dbus/1.4.14-1ubuntu1.3
  https://launchpad.net/ubuntu/+source/dbus/1.4.6-1ubuntu6.4
  https://launchpad.net/ubuntu/+source/dbus/1.2.16-2ubuntu4.7
  https://launchpad.net/ubuntu/+source/dbus/1.1.20-1ubuntu3.9