[tor-bugs] #15161 [Tor Messenger]: CTCP fingerprinting

Tor Bug Tracker & Wiki blackhole at torproject.org
Wed Jul 8 18:29:10 UTC 2015


#15161: CTCP fingerprinting
-------------------------------+---------------------
     Reporter:  cypherpunks    |      Owner:  sukhbir
         Type:  defect         |     Status:  closed
     Priority:  normal         |  Milestone:
    Component:  Tor Messenger  |    Version:
   Resolution:  fixed          |   Keywords:
Actual Points:                 |  Parent ID:  #14161
       Points:                 |
-------------------------------+---------------------
Changes (by sukhbir):

 * status:  reopened => closed
 * resolution:   => fixed


Comment:

 Replying to [comment:9 arlolra]:
 > From gk's audit,
 >
 > > While looking over ctcp-time.patch I got reminded by the problem that
 Date methods may leak locale and or platform version information ("The
 format of the return value may vary according to the platform" (see:
 https://developer.mozilla.org/en-
 US/docs/Web/JavaScript/Reference/Global_Objects/Date/toUTCString). It
 might be worth verifiying that this is not a problem for Tor Messenger
 (Tor Browser had/has #5926/#13019 and #15473 for this issue).

 I have confirmed both with `CTCP TIME` and by running `new
 Date().toUTCString()` (which is what `CTCP TIME` calls) on all platforms
 and there is no difference in the result so we are not leaking anything
 here.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/15161#comment:11>
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