File bnc_459007.patch of Package avahi

diff -Naur avahi-0.6.20/avahi-core/server.c avahi-0.6.20-mp/avahi-core/server.c
--- avahi-0.6.20/avahi-core/server.c	2007-05-09 00:51:01.000000000 +0200
+++ avahi-0.6.20-mp/avahi-core/server.c	2008-12-17 09:03:42.103972000 +0100
@@ -899,6 +899,12 @@
         return;
     }
 
+    if (port <= 0) {
+	/* This fixes RHBZ #475394, bnc#459007 */
+	avahi_log_warn("Received packet from invalid source port.");
+	return;
+    }
+
     if (avahi_address_is_ipv4_in_ipv6(src_address))
         /* This is an IPv4 address encapsulated in IPv6, so let's ignore it. */
         return;