Home page logo

fulldisclosure logo Full Disclosure mailing list archives

Re: New (19.10.05) MS-IE Url Spoofing bug (byK-Gen)
From: Nick FitzGerald <nick () virus-l demon co uk>
Date: Sat, 22 Oct 2005 07:47:04 +1300

Jake Cole to me:

You've turned a technical discussion into a nitpick
over poorly chosen words. I fail to see what that

The original author posted an example which was not
cross-browser for reasons not related to the
"exploit". IE uses document.write on the _current_
document yet Mozilla uses it in its original called
context. I simply added a SetTimeout to force Mozilla
to delay the call by a few milliseconds (FYI, the
"Firefox Version" works in IE also). But this little
browser inconsistency is meaningless because there are
dozens of other cross-browser methods to accomplish
the redirection without using document.write or
SetTimeout, as shown in the previous poster's example
using 'self.location.href'.

...and probably even without using scripting at all.

It is "expected" that when the user clicks on an
anchor tag, any action specified in the onClick event
will be executed. This is defined by the W3C spec and
consistent across all browsers. If one of several
scripting languages is enabled, the onClick event can
perform any of an endless number of actions. It can
create a mouseover, open a new window, call another
script, load an external object, close the browser,
and, yeah, it can even tell your browser to go to
google.com. All of these actions are potentially
malicious and may not be what the end-user expects.

Your argument that this is not sane behavior may be
valid but this behavior is as old as the web as we
know it. The time to speak up was almost a decade ago
because, without massive ramifications to the
functionality of millions of websites, not much is
going to completely "fix" it now.

Some informed, security aware folk have been saying such (and many 
other) things are insane, and for that long.

Just because the lunatics running the asylum at the time ignored us 
does not mean we were wrong or that (some of us) will now simply accept 
that because it is that way it should stay thus.  For all its "good", 
the whole WWW thing is a classic example of why geeks should not be 
allowed to develop end-user facing technology without massive 
assistance from folk who have some idea of how the non-geek folk in the 
world actually work.

This has gone way off track.

Only if you don't actually care about security, which has to make me 
wonder why you bother reading, and posting to, this list...


Nick FitzGerald

Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/

  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]