[tbb-bugs] #18138 [Tor Browser]: Circuit visualizer sometimes shows the wrong exit node

[Tor Bug Tracker & Wiki]

#18138: Circuit visualizer sometimes shows the wrong exit node
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     Reporter:             |      Owner:  tbb-team
  cypherpunks              |     Status:  new
         Type:  defect     |  Milestone:
     Priority:  Medium     |    Version:
    Component:  Tor        |   Keywords:  tbb-torbutton tbb-circuit-display
  Browser                  |  Parent ID:
     Severity:  Normal     |    Sponsor:
Actual Points:             |
       Points:             |
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 Making an arbitrary number of new circuits (either with the new identity
 button or when the Tor client creates circuits while browsing) eventually
 causes the circuit view in Torbutton to show the wrong exit node.

 I have noticed this in Tor Browser 5.0.3 through Tor Browser 5.0.7

 A far as I can tell, this is not related to architecture or OS nor to my
 network or even to machines owned by me. Also the problem is not limited
 to any particular website and it has nothing to do with JavaScript. I
 noticed this on Linux 64-bit and 32-bit on every Tor Browser version above
 and Windows 64-bit and 32-bit on version 5.0.3 (I've not checked since
 then). However I have not tested this in Mac OS X at all.

 When testing this I found that the number of new circuits that are needed
 to reproduce this varies. Sometimes it happened first time I visited
 check.torproject.org, other times I spent 10-15 minutes creating new
 identities.

 A screenshot can be found on stack exchange.
 https://tor.stackexchange.com/questions/9460/why-does-torbutton-circuit-
 view-not-consistently-show-the-correct-exit-node

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18138>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online