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Re: Apple IOS security issue pre-advisory record


From: Valdis.Kletnieks () vt edu
Date: Sat, 24 Mar 2012 11:53:48 -0400

On Sat, 24 Mar 2012 10:26:48 -0000, Dave said:

Doesn't the the -e, robots=off, --page-requisites and -H wget directives enable
one to collect all the necessary files that are called from a page?

No, not *all* the files, for the same reason that if you visit a page with
NoScript enabled, you may end up with missing content and/or big open spaces on
the page.

Consider a page that has Javascript on it:

todaysfile = "http://www.news-site.com/"; + date_as_string;
document.load(todaysfile);

Unless you interpret the javascript, you don't know what URL will get loaded,
because yesterday and tomorrow will get a different URL.  So basically,
if you try to pull it down with wget or similar, you will miss *all* the stuff
that's pulled down via Javascript (and probably via css as well - does wget
know how to follow CSS references?).  On many modern web designs,
this ends up being the vast majority of the content.



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