Juniper Junos 13.2 before 13.2R3 and 13.3 before 13.3R1, when PIM is enabled, allows remote attackers to cause a denial of service (kernel panic and crash) via a large number of crafted IGMP packets.
http://www.securityfocus.com/bid/66762
http://securitytracker.com/id?1030062
http://secunia.com/advisories/57819
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10618