Speaking of wireshark, a new version was released last week which fixes a vulnerability in the PCNFSD dissector.

References:

Announcement: http://www.wireshark.org/news/20090521.html

Advisory:  http://www.wireshark.org/security/wnpa-sec-2009-03.html

Release notes:  http://www.wireshark.org/docs/relnotes/wireshark-1.0.8.html

Download:  http://www.wireshark.org/download.html