full-disclosure - Different google interface when using some Tor exit nodes

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Message-ID: <447F31A7.5000708@pdx.edu>
Date: Thu Jun  1 19:28:08 2006
From: piercede at pdx.edu (Dean Pierce)
Subject: Different google interface when using some
	Tor	exit nodes

Yes, that is strange.  I don't think that it means tor is caching
cookies in exit points, but it is likely that there is a way to bind
that preference to your IP as opposed to the cookie like in the article.

I tried this

1. started tor
2. checked the IP of my exit point
3. did a google search, saw no side bar
4. activated the cookie using the arstechnica method
5. did a google search, saw the side bar
6. deleted the cookie from the browser
7. did a google search, saw no side bar
8. verified that I was still coming out of the same exit point

I personally would like to see some of the results you came up with.
Also, I have never seen that interface when browsing with tor normally,
what would you estimate as the ratio is of exit points with that behavior?

   - DEAN

Naxxtor Security wrote:
> Whilst using the Tor network to search google, once in a while the
> google search results interface changes to the "new look", as described
> here:
> http://arstechnica.com/news.ars/post/20060326-6460.html
> 
> But the method used there uses cookies.  This means one of two things:
> 
>  o 	The decision to serve the "new" interface can be made using 		
> cookies or a your source IP.
> 
>  o 	Tor exit nodes cache cookies.
> 
> With the later being a huge hole in security.
> 
> On investigation, none of the exit nodes used when the new interface was
> shown had valid reverse DNS.  If people are interested I'll post the
> results to the list.
> 
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