SecurityReason - PostNuke Critical XSS x=>0.760-RC2 ( Research Advisory )

Advisory Text :

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[PostNuke Critical XSS 0.760-RC2=>x cXIb8O3.2]

Author: cXIb8O3(Maksymilian Arciemowicz)
Date: 19.2.2005
from securityreason.com TEAM

- --- 0.Description ---

PostNuke: The Phoenix Release (0.750) and (0.760-RC2)

PostNuke is an open source, open developement content management system
(CMS). PostNuke started as a fork from PHPNuke (http://www.phpnuke.org) and
provides many enhancements and improvements over the PHP-Nuke system.
PostNuke
is still undergoing development but a large number of core functions are
now
stabilising and a complete API for third-party developers is now in place.
If you would like to help develop this software, please visit our homepage
at http://noc.postnuke.com/
You can also visit us on our IRC Server irc.postnuke.com channel
#postnuke-support
#postnuke-chat
#postnuke
Or at the Community Forums located at:
http://forums.postnuke.com/

- --- 1. Critical XSS in Download module ---
When we go to this url :

http://[HOST]/[DIR]/modules.php?op=modload&name=Downloads&file=index&req=Ad
dDownload

or

We can add XSS by passing unexpected data to the 'Program name' or 'File
link' or 'Author s
name' or 'Author s e-mail address' or 'File size' or 'Version' or 'Home
page' variable.

For exemple:

"><script>alert('cXIb8O3');</script>

Why this XSS is critical ?
Because when admin login in and try to view new downloads, then our XSS
will run on his
machine.
Evil attacker can create dangerous XSS to steal data (admin cookie with
session) or change the
site.

- --- 2. How to fix ---

Download the new version of the script or update.

- --- 3. Greets ---

only for sp3x.... and ladyBMS

- --- 4.Contact ---
Author: Maksymilian Arciemowicz
Location: Poland(Jelenia Gora), Luxembourg(Bereldange)
Email: max [at] jestsuper [dot] pl
GPG-KEY: http://security.jestsuper.pl
SECURITYREASON.COM TEAM

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