Multiple integer signedness errors in the tvb_unmasked function in epan/dissectors/packet-websocket.c in the Websocket dissector in Wireshark 1.8.x before 1.8.7 allow remote attackers to cause a denial of service (application crash) via a malformed packet.
http://anonsvn.wireshark.org/viewvc?view=revision&revision=48419
http://lists.opensuse.org/opensuse-updates/2013-06/msg00194.html
http://lists.opensuse.org/opensuse-updates/2013-06/msg00196.html
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=8499
http://secunia.com/advisories/53425
http://secunia.com/advisories/54425
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16696
http://www.debian.org/security/2013/dsa-2700