USN-380-1: Avahi vulnerability

11 November 2006

avahi vulnerability

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

  • Ubuntu 6.10
  • Ubuntu 6.06 LTS
  • Ubuntu 5.10

Software Description


Steve Grubb discovered that netlink messages were not being checked for their sender identity. This could lead to local users manipulating the Avahi service.

Update instructions

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

Ubuntu 6.10
avahi-daemon - 0.6.13-2ubuntu2.2
libavahi-core4 - 0.6.13-2ubuntu2.2
Ubuntu 6.06 LTS
avahi-daemon - 0.6.10-0ubuntu3.2
libavahi-core4 - 0.6.10-0ubuntu3.2
Ubuntu 5.10
avahi-daemon - 0.5.2-1ubuntu1.2
libavahi-core1 - 0.5.2-1ubuntu1.2

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the necessary changes.