full-disclosure - Microsoft Internet Explorer about:blank Cross Site Scripting

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From: rms at computerbytesman.com (Richard M. Smith)
Subject: Microsoft Internet Explorer about:blank Cross Site Scripting

Huh?  How is this a XSS bug?  How is the about: URL added to a Web page?

Richard

-----Original Message-----
From: full-disclosure-admin@...ts.netsys.com
[mailto:full-disclosure-admin@...ts.netsys.com] On Behalf Of Lorenzo
Hernandez Garcia-Hierro
Sent: Monday, August 11, 2003 1:13 PM
To: full-disclosure@...ts.netsys.com
Subject: [Full-Disclosure] Microsoft Internet Explorer about:blank Cross
Site Scripting

Microsoft Internet Explorer about:blank Cross Site Scripting
------
PRODUCT: Internet Explorer
VENDOR: Microsoft <www.microsoft.com>
VULNERABLE VERSIONS:

       - 6.0.2600.x <- without SP1
       - 5.0.x
       - 4.x
       - 3.x
       - And older versions possible affected too.

NO VULNERABLE VERSIONS

- ?
---------------------

Description:

Microsoft Internet Explorer is one of the best web browsers , used by 
millions of people around the world.
It is not the most secure web browser but is easy to use , quickly and 
good looking design.

---------------------------------------------
|SECURITY HOLES FOUND and PROOFS OF CONCEPT:|
---------------------------------------------

I encountered a Cross Site Scripting vulnerability when you pass 
crafted about:blank pages.

-----------------
| ABOUT:XSS ;-) |
-----------------

When you pass a specially crafted url to the Internet Explorer 
about:blank url you can
conduct a Cross Site Scripting Attack with a very simple technic :

about:blank%20[	CROSS SITE SCRIPTING ATTACK]

examples:

about:blank%20<script>alert('8-D uhh !');</script>

about:blank%20<iframe src="about:blank%20<h1>;- )"></iframe>

about:blank%20<h1>XSS is behind you...</h1>

With this you can get ( steal ) cookies from the victim's browser and 
perform another
attacks against the victim system.

-----------------
| IMPORTANT     |
|      NOTES    |
-----------------

1.- The SP1 for MS Internet Explorer contains XSS protection for url 
objects and you can't run this.
2.- This vulnerability is not related with the hole called about:// 
urls vulnerability .
3.- This vulnerability only concerns the about:blank url .

-----------
| CONTACT |
-----------

Lorenzo Hernandez Garcia-Hierro
--- Computer Security Analyzer ---
--Nova Projects Professional Coding--
PGP: Keyfingerprint
B6D7 5FCC 78B4 97C1 4010 56BC 0E5F 2AB2
ID: 0x9C38E1D7
**********************************
www.novappc.com
security.novappc.com
www.lorenzohgh.com
______________________

NSRG-20-7

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