The X.509if dissector in Wireshark 1.2.x before 1.2.16 and 1.4.x before 1.4.5 does not properly initialize certain global variables, which allows remote attackers to cause a denial of service (application crash) via a crafted .pcap file.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15050
https://hermes.opensuse.org/messages/8701428
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5793
http://www.wireshark.org/security/wnpa-sec-2011-06.html
http://www.wireshark.org/security/wnpa-sec-2011-05.html
http://www.vupen.com/english/advisories/2011/1106
http://www.vupen.com/english/advisories/2011/1022
http://www.mandriva.com/security/advisories?name=MDVSA-2011:083
http://www.debian.org/security/2011/dsa-2274
http://securitytracker.com/id?1025388
http://secunia.com/advisories/48947
http://secunia.com/advisories/45149
http://secunia.com/advisories/44822
http://secunia.com/advisories/44374
http://secunia.com/advisories/44172
http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058993.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058983.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058900.html
http://anonsvn.wireshark.org/viewvc?revision=36608&view=revision