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Re: DoS vulnerability in Internet Explorer

From: Laurent Gaffie <laurent.gaffie () gmail com>
Date: Tue, 01 Jun 2010 23:54:33 +1000
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Hello Full-Disclosure!

I want to warn you about a Denial of Service in every browser finaly !!!

It actually affect every browser with a javascript engine  build in !!!

Adobe may be vulnerable to !!!!

PoC :

<html>
<head><title>0n0z</title></head>
<body>
<script type="text/javascript">
for (i=0;i<65535;i++) {
  alert('0n0z mustlive got you, now you're fucked, the only solution
is to restart your browser or be faster than JS !!!');
}
</script>
</body>
</html>

Greetz to Mustlive () oswap com ua


On 01/06/10 22:42, MustLive wrote:

Hello Full-Disclosure!

I want to warn you about Denial of Service vulnerability in
Internet Explorer. Which I already disclosed at my site in 2008 (at
29.09.2008). But recently I made new tests concerning this
vulnerability, so I decided to remind you about it.

I know this vulnerability for a long time - it's well-known DoS in
IE. It works in IE6 and after release of IE7 I hoped that Microsoft
fixed this

hole

in seventh version of the browser. But as I tested at 29.09.2008,
IE7 was also vulnerable to this attack. And as I tested recently,
IE8 is also vulnerable to this attack.

Also I informed Microsoft at 01.10.2008 about it, but they ignored
and didn't fix it. They didn't fix the hole not in IE6, nor in IE7,
nor in IE8.

That time I published about this vulnerability at SecurityVulns
(http://securityvulns.com/Udocument636.html).

DoS:

Vulnerability concerned with handling by browser of expression in
styles, which leads to blocking of work of IE.

http://websecurity.com.ua/uploads/2008/IE%20DoS%20Exploit4.html

Vulnerable versions are Internet Explorer 6 (6.0.2900.2180),
Internet Explorer 7 (7.0.6000.16711), Internet Explorer 8
(8.0.7600.16385) and previous versions.

To Susan Bradley from Bugtraq:

This is one of those cases, which I told you before, when browser
vendors ignore to fix DoS holes in their browsers for many years.

Best wishes & regards, MustLive Administrator of Websecurity web
site http://websecurity.com.ua

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_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
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