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

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#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 robink):

 Replying to [comment:34 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.

 It's only when I run '''arm''' that it logs that message:

 {{{
 sudo -u debian-tor arm
 }}}

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8093#comment:35>
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