[tor-bugs] #16813 [Tor Browser]: Tor Browser + nscd leaks Tor DNS to System Cache to System DNS Servers

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#16813: Tor Browser + nscd leaks Tor DNS to System Cache to System DNS Servers
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     Reporter:  teor         |      Owner:  tbb-team
         Type:  defect       |     Status:  new
     Priority:  normal       |  Milestone:
    Component:  Tor Browser  |    Version:
   Resolution:               |   Keywords:  TorBrowserTeam201509
Actual Points:               |  Parent ID:
       Points:               |
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Comment (by mikeperry):

 FWIW, I am unable to reproduce this. I installed nscd on an Ubuntu 14.04
 machine, restarted Tor Browser, browsed with tcpdump watching port 53, and
 saw no DNS leaks.

 I suspect that the answer on https://tor.stackexchange.com/questions/4350
 /tor-dns-cached is right. Probably nscd cached an earlier non-TBB DNS
 query for something, and was refreshing it because the TTL expired, or for
 other reasons unrelated to TBB activity.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16813#comment:5>
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