The dissect_mpls_echo_tlv_dd_map function in epan/dissectors/packet-mpls-echo.c in the MPLS Echo dissector in Wireshark 1.8.x before 1.8.6 allows remote attackers to cause a denial of service (infinite loop) via invalid Sub-tlv data.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16376
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=8039
http://www.wireshark.org/security/wnpa-sec-2013-14.html
http://www.wireshark.org/docs/relnotes/wireshark-1.8.6.html
http://secunia.com/advisories/52471
http://lists.opensuse.org/opensuse-updates/2013-03/msg00077.html
http://lists.opensuse.org/opensuse-updates/2013-03/msg00065.html
http://anonsvn.wireshark.org/viewvc?view=revision&revision=46391