Avahi is vulnerable to Denial Of Service (DoS). Due to the way the Avahi daemon (avahi-daemon) processed Multicast DNS (mDNS) packets with corrupted checksums, an attacker on the local network could use this flaw to cause avahi-daemon on a target system to exit unexpectedly via specially-crafted mDNS packets.
lists.fedoraproject.org/pipermail/package-announce/2010-July/043800.html
lists.fedoraproject.org/pipermail/package-announce/2010-July/043820.html
marc.info/?l=oss-security&m=127748459505200&w=2
www.debian.org/security/2010/dsa-2086
www.mandriva.com/security/advisories?name=MDVSA-2010:204
www.openwall.com/lists/oss-security/2010/06/23/4
www.redhat.com/security/updates/classification/#moderate
www.securitytracker.com/id?1024200
access.redhat.com/errata/RHSA-2010:0528
bugzilla.redhat.com/show_bug.cgi?id=607293