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Re: [tor-bugs] #13018 [Tor Browser]: Math routines are OS fingerprintable

#13018: Math routines are OS fingerprintable
-------------------------+-------------------------------------------------
     Reporter:           |      Owner:  tbb-team
  mikeperry              |     Status:  new
         Type:  task     |  Milestone:
     Priority:  normal   |    Version:
    Component:  Tor      |   Keywords:  tbb-fingerprinting-os, tbb-easy,
  Browser                |  ff31-esr, TorBrowserTeam201410Easy
   Resolution:           |  Parent ID:
Actual Points:           |
       Points:           |
-------------------------+-------------------------------------------------

Comment (by cypherpunks):

 {{{
 <html>
   <head>
     <title>https://bugzilla.mozilla.org/show_bug.cgi?id=531915</title>
   </head>
   <body>
     <p>Detected platform for Tor Browser (based on ff24-esr):</p>
     <script>
       var check_tan = Math.tan(-1e300);

       if (check_tan == -1.4214488238747245)
         document.write("Linux 64");
       else if (check_tan == 0.8831488831618285)
         document.write("Linux 32");
       else if (check_tan == -4.987183803371025)
         document.write("Windows");
       else
         document.write("Mac OS X");
     </script>
   </body>
 </html>
 }}}

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13018#comment:17>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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