It may be possible to make Wireshark crash or execute malicious code by convincing someone to read a malformed packet trace file. The latest version of Wireshark (1.8.13) is not vulnerable to these issues, therefore it is recommended to upgrade to versions 1.10.6, 1.8.13 or later.
Read the Security Advisory here – http://www.wireshark.org/security/wnpa-sec-2014-04.html
