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[tor-bugs] #9308 [Firefox Patch Issues]: JavaScript's BrowserFeedWriter() leaks installation paths on OS X

#9308: JavaScript's BrowserFeedWriter() leaks installation paths on OS X
----------------------------------+-----------------------------------------
 Reporter:  cypherpunks           |          Owner:  mikeperry    
     Type:  defect                |         Status:  new          
 Priority:  critical              |      Milestone:               
Component:  Firefox Patch Issues  |        Version:  Tor: 0.2.3.25
 Keywords:  tbb-fingerprinting    |         Parent:  #5922        
   Points:                        |   Actualpoints:               
----------------------------------+-----------------------------------------
 In #5922 it was claimed that the vulnerability uncovered at Defcon 17 by
 Gregory Fleischer (http://pseudo-flaw.net/tor/torbutton/browserfeedwriter-
 error.html) doesn't affect TBB on OS X. I have just replicated this bug on
 2.3.25-10.

 When the TBB is installed in a user's homedir, calling (new
 BrowserFeedWriter()).close() will leak their username in a JS exception.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/9308>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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