USN-799-1: D-Bus vulnerability

13 July 2009

dbus vulnerability

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

  • Ubuntu 9.04
  • Ubuntu 8.10
  • Ubuntu 8.04 LTS
  • Ubuntu 6.06 LTS

Software Description

  • dbus


It was discovered that the D-Bus library did not correctly validate signatures. If a local user sent a specially crafted D-Bus key, they could spoof a valid signature and bypass security policies.

Update instructions

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

Ubuntu 9.04
libdbus-1-3 - 1.2.12-0ubuntu2.1
Ubuntu 8.10
libdbus-1-3 - 1.2.4-0ubuntu1.1
Ubuntu 8.04 LTS
libdbus-1-3 - 1.1.20-1ubuntu3.3
Ubuntu 6.06 LTS
libdbus-1-2 - 0.60-6ubuntu8.4

To update your system, please follow these instructions:

After a standard system upgrade you need to reboot your computer to effect the necessary changes.