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[tor-bugs] #20773 [Applications/Tor Browser Sandbox]: Stop mounting `/proc` in the various containers once this is feasable.



#20773: Stop mounting `/proc` in the various containers once this is feasable.
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     Reporter:  yawning                           |      Owner:  yawning
         Type:  enhancement                       |     Status:  new
     Priority:  Medium                            |  Milestone:
    Component:  Applications/Tor Browser Sandbox  |    Version:
     Severity:  Normal                            |   Keywords:
Actual Points:                                    |  Parent ID:
       Points:                                    |   Reviewer:
      Sponsor:                                    |
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 All three containers currently used by `sandboxed-tor-browser` (tor,
 firefox, and the updater) currently mount `/proc`.  Once it's been
 verified that relevant versions of the software shipped do not require
 such, this mount should be removed to reduce fingerprinting and to close
 an attack vector.

 In the mean time, stopgap solutions such as AppArmor could be investigated
 as well, though that is not a good long term solution as it is not
 ubiquitous.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20773>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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