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USN-1084-1: avahi vulnerability

7 March 2011

An attacker could send crafted input to Avahi and cause it to hang.



  • avahi - Avahi IPv4LL network address configuration daemon


It was discovered that Avahi incorrectly handled empty UDP packets. A
remote attacker could send a specially-crafted packet and cause Avahi to
hang, resulting in a denial of service.

Update instructions

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

Ubuntu 9.10
Ubuntu 8.04
Ubuntu 10.10
Ubuntu 10.04

After a standard system update you need to reboot your computer to make
all the necessary changes.