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HistoryJun 25, 2010 - 12:00 a.m.

Mozilla Foundation Security Advisory 2010-33

2010-06-2500:00:00
vulners.com
75

Mozilla Foundation Security Advisory 2010-33

Title: User tracking across sites using Math.random()
Impact: Low
Announced: June 22, 2010
Reporter: Amit Klein
Products: Firefox, SeaMonkey

Fixed in: Firefox 3.6.4
Firefox 3.5.10
SeaMonkey 2.0.5
Description

Security researcher Amit Klein reported that it was possible to reverse engineer the value used to seed Math.random(). Since the pseudo-random number generator was only seeded once per browsing session, this seed value could be used as a unique token to identify and track users across different web sites.
References

* https://bugzilla.mozilla.org/show_bug.cgi?id=475585
* CVE-2008-5913