wireshark is vulnerable to denial of service. If Wireshark read a malformed packet off a network or opened a malicious dump file, it could crash or, possibly, execute arbitrary code as the user running Wireshark.
anonsvn.wireshark.org/viewvc?revision=36608&view=revision
lists.fedoraproject.org/pipermail/package-announce/2011-April/058900.html
lists.fedoraproject.org/pipermail/package-announce/2011-April/058983.html
lists.fedoraproject.org/pipermail/package-announce/2011-April/058993.html
openwall.com/lists/oss-security/2011/04/18/2
openwall.com/lists/oss-security/2011/04/18/8
secunia.com/advisories/44172
secunia.com/advisories/44374
secunia.com/advisories/44822
secunia.com/advisories/45149
secunia.com/advisories/48947
securitytracker.com/id?1025388
www.debian.org/security/2011/dsa-2274
www.mandriva.com/security/advisories?name=MDVSA-2011:083
www.osvdb.org/71846
www.vupen.com/english/advisories/2011/1022
www.vupen.com/english/advisories/2011/1106
www.wireshark.org/security/wnpa-sec-2011-05.html
www.wireshark.org/security/wnpa-sec-2011-06.html
access.redhat.com/errata/RHSA-2012:0509
access.redhat.com/security/cve/CVE-2011-1590
access.redhat.com/security/updates/classification/#moderate
bugs.wireshark.org/bugzilla/show_bug.cgi?id=5754
bugs.wireshark.org/bugzilla/show_bug.cgi?id=5793
bugzilla.redhat.com/show_bug.cgi?id=697741
hermes.opensuse.org/messages/8701428
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15050