Rapid7 Security Advisory – tcpdump versions 3.8.1 and below contain multiple flaws in the packet display functions for the ISAKMP protocol. Upon receiving specially crafted ISAKMP packets, tcpdump will try to read beyond the end of the packet capture buffer and crash.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/32981/R7-0017.txt
Source: https://packetstormsecurity.com/files/32981/Rapid7-Security-Advisory-17.html