tcpdump ISAKMP payload handling remote denial-of-service

Chad Loder has discovered vulnerabilities in tcpdump’s
ISAKMP protocol handler. During an audit to repair these
issues, Bill Fenner discovered some related problems.
These vulnerabilities may be used by an attacker to crash a
running tcpdump' process. They can only be triggered if the -v’ command line option is being used.
NOTE: the racoon ISAKMP/IKE daemon incorporates the ISAKMP
protocol handler from tcpdump, and so is also affected by
this issue.