Home page logo
/

pen-test logo Penetration Testing mailing list archives

Re: Citrix application breakout - take care of Microsoft calculator
From: sherwyn.williams () gmail com
Date: Wed, 12 Mar 2008 11:34:36 +0000

If you are looking to harden Kiosk I think the first step would be to disable the windows key from the keyboard, once 
you press Win key + U for utility manager you can do some really funky stuff, I read an article in 2600 this week 
detailing this.
Sent from my Verizon Wireless BlackBerry

-----Original Message-----
From: "Gleb Paharenko" <gpaharenko () gmail com>

Date: Mon, 10 Mar 2008 09:55:27 
To:"Stefan Gora" <stefan.gora () secorvo de>
Cc:pen-test () securityfocus com
Subject: Re: Citrix application breakout - take care of Microsoft calculator


Thank you Stefan.

A question for all. Is there some checklist about what should be
stripped out of the default Windows shippment for similar cases?

 I'm especially interested in hardening windows for kiosks. There
bunch of applications (screen keyboard, notepad, others?) which should
be removed.

2008/3/7, Stefan Gora <stefan.gora () secorvo de>:
Dear all,

 I'm not shure if the following issue is already known or exciting,
 nevertheless the following attack vector found during a penetration test
 might be interesting:

 A customer has built a Citrix environment for a partner company to
 provide access to a specific application. This application was intended
 to be the only application accessible for this partner. It was possible
 to get a remote task manager with CRTL-F3, but no other way of
 interacting with the Citrix Server (e.g. through printing or so).

 Unfortunately they have integrated Microsoft's calculator into the
 application. A bad idea - guess why ;-).

 Using the calculator you are able to do funny stuff: Open the calculator
 and click "info". Klick on the licence agreement and here you go, you
 have got an editor. With this you can use "open file" and browse the
 server, find for example Word and rightclick on "Open" - Word is
 running, and all other applications which you like as well ...

 I think this can easily be fixed using more restrictive file
 permissions, but I thought maybe some of you might find this information
 useful.

 Stefan

 --
 --------------------------------------------------------
 Identity Management Symposium 22.-23.04.2008 KA/Ettlingen
 http://www.identity-management-symposium.de
 --------------------------------------------------------

 Stefan Gora
 Security Consultant

 Secorvo Security Consulting GmbH
 Ettlinger Strasse 12-14, D-76137 Karlsruhe
 Tel. +49 721 255171-302, Fax +49 721 255171-100
 stefan.gora () secorvo de, http://www.secorvo.de
 PGP: 5EAD 34FE F3C1 0FEB  058F 4DD0 E6B3 FF4A

 Mannheim HRB 108319, Geschaeftsfuehrer: Dirk Fox

 ------------------------------------------------------------------------
 This list is sponsored by: Cenzic

 Need to secure your web apps NOW?
 Cenzic finds more, "real" vulnerabilities fast.
 Click to try it, buy it or download a solution FREE today!

 http://www.cenzic.com/downloads
 ------------------------------------------------------------------------




-- 
Best regards.
Gleb Pakharenko.
http://gpaharenko.livejournal.com

------------------------------------------------------------------------
This list is sponsored by: Cenzic

Need to secure your web apps NOW?
Cenzic finds more, "real" vulnerabilities fast.
Click to try it, buy it or download a solution FREE today!

http://www.cenzic.com/downloads
------------------------------------------------------------------------


  By Date           By Thread  

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