[tor-bugs] #6821 [Tor bundles/installation]: TBB startup script should clear env vars which TorBrowserButton would read

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#6821: TBB startup script should clear env vars which TorBrowserButton would read
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 Reporter:  rransom                   |          Owner:  erinn
     Type:  defect                    |         Status:  new  
 Priority:  normal                    |      Milestone:       
Component:  Tor bundles/installation  |        Version:       
 Keywords:                            |         Parent:       
   Points:                            |   Actualpoints:       
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Comment(by proper):

 Replying to [comment:2 rransom]:
 > If a user unintentionally runs TBB with the `TOR_TRANSPROXY` environment
 variable set, they have lost their anonymity completely.

 How could that happen?

 > If Tails or some other product which configures TorBrowser to use a
 system Tor cannot pass the `TOR_TRANSPROXY` environment variable through
 the `start-tor-browser` script, they will have to ship their own script --
 which they would have to do anyway in order to launch the browser without
 an extraneous instance of Vidalia.

 Not necessarily. See #5611 variable TB_STANDALONE.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/6821#comment:4>
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