Penetration Testing mailing list archives
Re: Citrix application breakout - take care of Microsoft calculator
From: "Gleb Paharenko" <gpaharenko () gmail com>
Date: Mon, 10 Mar 2008 09:55:27 +0200
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 ------------------------------------------------------------------------
Current thread:
- Citrix application breakout - take care of Microsoft calculator Stefan Gora (Mar 07)
- RE: Citrix application breakout - take care of Microsoft calculator Thor (Hammer of God) (Mar 07)
- RE: Citrix application breakout - take care of Microsoft calculator Shenk, Jerry A (Mar 08)
- Re: Citrix application breakout - take care of Microsoft calculator Gleb Paharenko (Mar 12)
- Re: Citrix application breakout - take care of Microsoft calculator sherwyn . williams (Mar 13)
- RE: Citrix application breakout - take care of Microsoft calculator Erik Soosalu (Mar 12)
- Re: Citrix application breakout - take care of Microsoft calculator infolookup (Mar 13)
- <Possible follow-ups>
- Re: Citrix application breakout - take care of Microsoft calculator Bill Stout (Mar 17)
- RE: Citrix application breakout - take care of Microsoft calculator Robert S. Slifkin (Mar 18)
- Re: Citrix application breakout - take care of Microsoft calculator Shreyas Zare (Mar 18)
- RE: Citrix application breakout - take care of Microsoft calculator Robert S. Slifkin (Mar 18)
- RE: Citrix application breakout - take care of Microsoft calculator Thor (Hammer of God) (Mar 07)