USN-1576-2: DBus regressions

Releases

• Ubuntu 12.04
• Ubuntu 11.10
• Ubuntu 11.04
• Ubuntu 10.04
• Ubuntu 8.04

Packages

• 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 8.04

• dbus - 1.1.20-1ubuntu3.9
• libdbus-1-3 - 1.1.20-1ubuntu3.9

Ubuntu 12.04

• 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

• dbus - 1.2.16-2ubuntu4.7
• libdbus-1-3 - 1.2.16-2ubuntu4.7

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

References

• CVE-2012-3524

Related notices

• USN-1576-1: dbus, libdbus-1-3