epan/dissectors/packet-websocket.c in the WebSocket dissector in Wireshark 1.12.x before 1.12.5 uses a recursive algorithm, which allows remote attackers to cause a denial of service (CPU consumption) via a crafted packet.
https://security.gentoo.org/glsa/201510-03
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=10989
http://www.wireshark.org/security/wnpa-sec-2015-13.html
http://www.securityfocus.com/bid/74629
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html