[tor-bugs] #8093 [Tor]: Jan 29 23:32:20.066 [Warning] Bug/attack: unexpected sendme cell from client. Closing circ.

Mon Sep 29 12:19:08 UTC 2014

#8093: Jan 29 23:32:20.066 [Warning] Bug/attack: unexpected sendme cell from
client. Closing circ.
-------------------------+-------------------------------------------------
     Reporter:           |      Owner:  nickm
  Gravitas               |     Status:  new
         Type:  defect   |  Milestone:  Tor: 0.2.???
     Priority:  normal   |    Version:  Tor: 0.2.4.9-alpha
    Component:  Tor      |   Keywords:  tor-client, 025-triaged needs-
   Resolution:           |  insight
Actual Points:           |  Parent ID:
       Points:           |
-------------------------+-------------------------------------------------

Comment (by keb):

 Replying to [comment:33 robink]:
 > Sep 29 08:35:48.000 [notice] New control connection opened.
 > Sep 29 08:36:16.000 [warn] Unexpected sendme cell from client. Closing
 circ (window 1000).
 > Sep 29 08:37:14.000 [notice] New control connection opened.
 > Sep 29 08:39:09.000 [notice] New control connection opened.
 > Sep 29 08:46:51.000 [warn] Unexpected sendme cell from client. Closing
 circ (window 1000).
 > Sep 29 08:57:17.000 [notice] New control connection opened.
 > Sep 29 08:58:55.000 [notice] New control connection opened.

 How are you getting so many control connections open that never close?  If
 it is related to the unexpected cells, it would be some sort of exploit.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8093#comment:34>
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