------------------------------------------------------------
      - EXPL-A-2005-008 exploitlabs.com Advisory 037 -
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                     - Site Studio -






AFFECTED PRODUCTS
=================
Site Studio

Positive Software Corporation
https://www.psoft.net




OVERVIEW
========
SiteStudio is industry leading browser-based web site design
and construction tool. It may also be fully and seamlessly integrated
with H-Sphere. By using SiteStudio you add value to your Internet
service by providing your customers with the easiest way to build
a website. With SiteStudio, your users need not know anything
about FTP, HTML, Telnet, HTTP, or imaging software. If they can
surf the Internet, they can build their own professionally looking
website.

note: Site Studio runs via Coyote/Jakarta on port 8080 by default



DETAILS
=======
1. persistant XSS in the guestbook

Site Studio guestbook does not filter HTML code from user-supplied
input. A remote user can create a specially crafted entry that,
when the page rendered, will cause arbitrary scripting to be
executed by the user's browser. The code will originate from
the site running the Site Studio software and will run in the
security context of that site.



Item 1
---------

entering XSS type scripting in the name input field causes the
script to be rendered upon visitation to the affected the page.

a.
Standalone Site Studio installations may be accessable on the target site
via:

psoft.guestbook.GuestBookServ

http://[HOST]:8080/studio/servlet/psoft.guestbook.GuestBookServ



b.
Integrated Site Studio with H-Sphere may be accessable on the target site
via:

E-Guest_sign.pl

http://[host]/cp/Scripts/perl/guestbook/E-Guest_sign.pl





SOLUTION:
=========
Psoft has been contacted and patches released:

item a:
http://www.psoft.net/SS/ss_16_security_update_guestbook.html

item b:
http://www.psoft.net/misc/hsphere_winbox_security_update_guestbook.html




Credits
=======
This vulnerability was discovered and researched by
Donnie Werner of exploitlabs

Donnie Werner

mail:   wood at exploitlabs.com
mail:  morning_wood at zone-h.org
-- 
web:  http://exploitlabs.com
web:  http://zone-h.org

http://exploitlabs.com/files/advisories/EXPL-A-2005-008-sitestudio.txt