FreeBSD Security Advisory (FreeBSD-SA-05:10.tcpdump.asc)

The remote host is missing an update to the system as announced in the referenced advisory FreeBSD-SA-05:10.tcpdump.asc
Upgrade your system to the appropriate stable release or security branch dated after the correction date
The tcpdump utility is used to capture and examine network traffic. Several tcpdump protocol decoders contain programming errors which can cause them to go into infinite loops.