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Re: [Full-disclosure] Firefox + popup blocker + XMLHttpRequest + srand() = oops

From: Michal Zalewski (lcamtufdione.ids.pl)
Date: Mon Feb 05 2007 - 06:44:22 CST


On Mon, 5 Feb 2007, pdp (architect) wrote:

> You may as well use a QuickTime .mov/.qtl or a PDF document to open a
> file:// link . I think it is easier.

Sure. You can probably have a file:// link in Open Office / MS Office
documents as well; but these all rely on external components, and as such,
attacks could be shrugged off as a weakness in these apps (and there's
some truth to this).

Browser authors know better, and they disallow file:// URLs from the
Internet ever since Javascript became so powerful; this case managed to
slip through, so I thought it's a neat example, in conjunction with
deterministic temporary files.

/mz