[tor-bugs] #13155 [Tor]: I can use an extend cell to remotely determine whether two relays have a connection open

Tor Bug Tracker & Wiki blackhole at torproject.org
Mon Sep 15 16:18:00 UTC 2014


#13155: I can use an extend cell to remotely determine whether two relays have a
connection open
------------------------+--------------------------
     Reporter:  arma    |      Owner:
         Type:  defect  |     Status:  new
     Priority:  normal  |  Milestone:  Tor: 0.2.???
    Component:  Tor     |    Version:
   Resolution:          |   Keywords:
Actual Points:          |  Parent ID:
       Points:          |
------------------------+--------------------------

Comment (by cypherpunks):

 First fix is to compare port by `channel_matches_target_addr_for_extend`,
 it will prevent broken logic for every case. If client requested
 `address:port` other than relay had for already open non-canonical
 connection then relay should not to reuse non canonical connection for
 such request.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13155#comment:7>
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