Two vulnerabilities have been reported in Wireshark, which can be exploited by malicious people to cause a DoS (Denial of Service).

1) An error within the PPP dissector can be exploited to cause a crash via a specially crafted packet.

2) An error within the NFS dissector can be exploited to consume CPU resources and cause a crash via a specially crafted packet.

The vulnerabilities are reported in versions prior to 1.8.1, 1.6.9, and 1.4.14.

Solution
Update to version 1.8.1, 1.6.9, or 1.4.14.

Provided and/or discovered by
1) Bjørn Mork in a Debian bug.
2) Reported by the vendor.

Original Advisory
Wireshark:
http://www.wireshark.org/security/wnpa-sec-2012-11.html
http://www.wireshark.org/security/wnpa-sec-2012-12.html

Bjørn Mork:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=680056

Deep Links
Links available to Secunia VIM customers