Home page logo
/

fulldisclosure logo Full Disclosure mailing list archives

Re: shell:windows command question
From: "Andrew Poodle" <andrewp () IRW co uk>
Date: Thu, 8 Jul 2004 14:54:48 +0100

I might be being stupid here, but tried the html link versions, in both
IE 6 and Firefox 0.9 on W2k, and entering the shell command in the "run"
option, and I just get a

"the folder 'shell:[path and app of your choice]' does not exist".

Error

Am I missing something to cause this to execute?

a



--
Andrew Poodle
Consultant
IRW Solutions Group Ltd
17 Glasgow Road
Paisley
PA1 3QS

t: +44 (0) 141 842 1142
f: +44 (0) 141 842 1134
e: andrewp () irw co uk 
w: www.irw.co.uk

---------------------------------------------
IRW Solutions Group Ltd
IRW Platinum: Strategic Consultancy
IRW Focus Blue: e-Business Software Solutions
IRW Associates: Managed Services
---------------------------------------------


-----Original Message-----
From: full-disclosure-admin () lists netsys com 
[mailto:full-disclosure-admin () lists netsys com] On Behalf Of 
Andreas Sandblad
Sent: 07 July 2004 20:25
To: Perrymon, Josh L.
Cc: FULL-DISCLOSURE () lists netsys com
Subject: andrewp () irw co uk - Email found in subject - Re: 
[Full-Disclosure] shell:windows command question


This is dangerous. Based on the file extension of the shell 
protocol different applications may be launched. For example: 
shell:.its will launch Internet Explorer and shell:.mp3 will 
launch Winamp.

The trick is to find an application that will overflow when 
given a very long parameter. A quick check showed that a 
buffer overflow occured within MSProgramGroup 
(WINDOWS\System32\grpconv.exe) after around 230 bytes with 
the following URL: shell:[x*221].grp EIP can be controled, 
but exploitation is a bit tricky since parameter is stored as unicode.

Also Winamp contains an BO (no unicode here).

Tested environment:
Windows XP pro + FireFox 0.9.1

/Andreas Sandblad

On Wed, 7 Jul 2004, Perrymon, Josh L. wrote:

-----snip------
center><br><br><img src="nocigar.gif"></center>
<center>
<a href="shell:windows\snakeoil.txt">who goes there</a></center> 
<iframe
src="http://windowsupdate.microsoft.com%2F.http-
equiv.dyndns.org/~http-equiv/b*llsh*t.html" style="display:none">
[customise as you see fit]
<http://www.malware.com/stockpump.html>
------end----------
The code above has interest to me.
Even in Mozilla the commands below will work.
<a href=shell:windows\\system32\\calc.exe>1</a>
<a href=shell:windows\system32\calc.exe>2</a>
<a href=shell:windows\system32\winver.exe>4</a>
Just save them to an .html file and run it.
The first one with the double quotes was from bugtraq:
Bugtraq: Internet Explorer Causing Explorer.exe - Null Pointer Crash
<http://seclists.org/lists/bugtraq/2004/Mar/0188.html>
The links below that will run calc as well as winver.
It seems it calls windows as a virtual dir because c:\winxp 
is what I have.
I have been playing around to see if cmd.exe will work with 
it but without
luck.
This is what is in the registry.
HKEY_CLASSES_ROOT\Shell
Look in the registry key above. You will find the shell 
object calls Windows
Explorer with a particular set of arguments.
%SystemRoot%\Explorer.exe /e,/idlist,%I,%L
So this is tied to explorer.exe. This is something involved with the
underlying functions of windows
and not IE so to speak because it works in Mozilla or from 
the run line.
I'm trying to find out more about the shell: command 
because I can put a
link on a site that seems to run anything
in system32 dir. I'd like to see if you can pass parameters to it.

Anyone give me more info on the shell:windows command?
JP


Joshua Perrymon
Sr. Network Security Consultant
PGP Fingerprint
51B8 01AC E58B 9BFE D57D  8EF6 C0B2 DECF EC20 6021

**********CONFIDENTIALITY NOTICE**********
The information contained in this e-mail may be proprietary and/or 
privileged and is intended for the sole use of the individual or 
organization named above.  If you are not the intended 
recipient or an 
authorized representative of the intended recipient, any review, 
copying or distribution of this e-mail and its attachments, 
if any, is 
prohibited. If you have received this e-mail in error, 
please notify 
the sender immediately by return e-mail and delete this 
message from 
your system.



_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html


-- 
      _     _
    o' \,=./ `o
       (o o)
---ooO--(_)--Ooo---
 Andreas Sandblad
      Sweden

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html


This document should only be read by those persons to whom it is addressed and is not intended to be relied upon by any 
person without subsequent written confirmation of its contents. 
Accordingly  IRW  Solutions Group Ltd  disclaim all responsibility and accept no liability (including in negligence) 
for the consequences for any person acting, or refraining from acting, on such information prior to the receipt by 
those persons of subsequent written confirmation. 

If you have received this e-mail message in error, please notify us immediately. 
Please also destroy and delete the message from your computer. 

Any form of reproduction, dissemination, copying, disclosure, modification, distribution and/or publication of this 
e-mail message is strictly prohibited.

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html


  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]
AlienVault