[Full-Disclosure] Re: a method for bypassing cookie restrictions in web browsers

From: Michal Zalewski (lcamtuf_at_ghettot.org)
Date: 01/20/04

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    To: Dave McKinney <dm@securityfocus.com>
Date: Tue, 20 Jan 2004 02:04:52 +0100 (CET)

    On Mon, 19 Jan 2004, Dave McKinney wrote:

    > This does appear to be a known way of tracking web users without using
    > cookies: http://sourcefrog.net/projects/meantime/

    Yup, my apologies for this sort-of-false alert. The only excuse I can
    offer is that I failed to find any related information during a routine
    run of Google queries, and that the flaw is still very much alive
    nowadays.

    The problem is ineed known, both the use of ETags and Last-Modified
    headers to store data, and the indirect variant I described later on. The
    issue had been initially reported by Martin Pool here:

      http://cert.uni-stuttgart.de/archive/bugtraq/2000/03/msg00365.html

    Cheers, 

    -- 
------------------------- bash$ :(){ :|:&};: --
 Michal Zalewski * [http://lcamtuf.coredump.cx]
    Did you know that clones never use mirrors?
--------------------------- 2004-01-20 01:57 --
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