[tor-bugs] #13667 [Tor]: Prevent port scanning of hidden services

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#13667: Prevent port scanning of hidden services
------------------------+--------------------------------
     Reporter:  arma    |      Owner:
         Type:  defect  |     Status:  new
     Priority:  normal  |  Milestone:  Tor: 0.2.5.x-final
    Component:  Tor     |    Version:
   Resolution:          |   Keywords:  SponsorR tor-hs
Actual Points:          |  Parent ID:
       Points:          |
------------------------+--------------------------------

Comment (by arma):

 The code to look at is in connection_exit_begin_conn() where it does
 {{{
     if (rend_service_set_connection_addr_port(n_stream, origin_circ) < 0)
 {
       log_info(LD_REND,"Didn't find rendezvous service (port %d)",
                n_stream->base_.port);
       relay_send_end_cell_from_edge(rh.stream_id, circ,
                                     END_STREAM_REASON_EXITPOLICY,
                                     origin_circ->cpath->prev);
       connection_free(TO_CONN(n_stream));
       tor_free(address);
       return 0;
     }
 }}}
 and instead it should return something negative (and maybe clean up
 differently, I haven't looked).

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13667#comment:1>
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