[tor-bugs] #5715 [TorBrowserButton]: "New Identity" has cache race conditions that temporarily allow evercookies

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#5715: "New Identity" has cache race conditions that temporarily allow evercookies
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 Reporter:  guiseppe          |          Owner:  mikeperry
     Type:  defect            |         Status:  new      
 Priority:  critical          |      Milestone:           
Component:  TorBrowserButton  |        Version:           
 Keywords:  MikePerry201205   |         Parent:           
   Points:                    |   Actualpoints:           
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Comment(by gk):

 Replying to [comment:5 mikeperry]:
 > Replying to [comment:4 gk]:
 > > > gk - if you have spare cycles, could you maybe test third party
 images and make sure the same image url still gets 200 load requests from
 two different url bar domains?
 > >
 > > Sure. Do you want me to test with JonDoFox as is? Or with TBB
 including your fixes? Or... The TBB testing could take some time as I do
 not have a TBB build environment yet.
 >
 > My fixes above are only relevant to New Identity. Do you make use of
 https://gitweb.torproject.org/torbrowser.git/blob/maint-2.2:/src/current-
 patches/firefox/0004-Add-a-string-based-cacheKey.patch in JonDos?

 Not yet. But I have an alpha version of JonDoBrowser and could apply the
 patch to it.

 > If so, test your per-tab isolation or whatever uses it with images.
 https://encrypted.google.com/images/srpr/logo3w.png seems like a fine
 image to source from two tabs. If it actually loads in both tabs, it's not
 cached. Tools->Web Developer->Web Console should be sufficient.

 Ok. I'll see what i can do.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/5715#comment:6>
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