postnukeXSS.txt

`  
  
-----BEGIN PGP SIGNED MESSAGE-----  
Hash: SHA1  
  
[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=AddDownload  
  
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  
  
-----BEGIN PGP SIGNATURE-----  
Version: GnuPG v1.2.6 (FreeBSD)  
  
iD8DBQFCI3y3znmvyJCR4zQRAtNOAJ99VTZa9wY+JLiq3aCYK8rZyvIZmACeJTbF  
L6pS+erISCfwB8aT/bmPanM=  
=QqTD  
-----END PGP SIGNATURE-----  
`