A vulnerability has been found and corrected in avahi:

avahi-core/socket.c in avahi-daemon in Avahi before 0.6.29 allows
remote attackers to cause a denial of service (infinite loop) via
an empty (1) IPv4 or (2) IPv6 UDP packet to port 5353. NOTE: this
vulnerability exists because of an incorrect fix for CVE-2010-2244
(CVE-2011-1002).

Packages for 2009.0 are provided as of the Extended Maintenance
Program. Please visit this link to learn more:
http://store.mandriva.com/product_info.php?cPath=149&products_id=490

The updated packages have been patched to correct this issue.