waraxe-2007-SA059.txt

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[waraxe-2007-SA#059] - XSS in WordPress 2.3  
====================================================================  
  
Author: Janek Vind "waraxe"  
Date: 27. October 2007  
Location: Estonia, Tartu  
Web: http://www.waraxe.us/advisory-59.html  
  
  
Target software description:  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
  
WordPress is a state-of-the-art semantic personal publishing platform  
with a focus on aesthetics, web standards, and usability.  
  
To run WordPress your host just needs a couple of things:  
  
PHP version 4.2 or greater   
MySQL version 4.0 or greater   
  
Vulnerabilities: Cross-Site Scripting (XSS) in "edit-post-rows.php"  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
  
Let's have a look inside "/wp-admin/edit-post-rows.php":  
  
------------>[source code]<------------  
<?php foreach($posts_columns as $column_display_name) { ?>  
<th scope="col"><?php echo $column_display_name; ?></th>  
<?php } ?>  
------------>[/source code]<-----------  
  
As we can see, array "posts_columns" is uninitialized and if we execute  
this php script directly, then arbitrary value for that variable can be  
delivered. This means, that reflective XSS exists here. And of course,  
"register_globals" must be "on" for this exploit to be successful.  
  
Proof of concept:  
  
http://victim.com/wp-admin/edit-post-rows.php?posts_columns[]=<script>alert(123);</script>  
  
  
//-----> See ya soon and have a nice day ;) <-----//  
  
How to fix:  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
  
Get latest WordPress version 2.3.1:  
  
http://wordpress.org/latest.zip  
  
... and update ASAP :)  
  
  
Greetings:  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
  
Greets to ToXiC, LINUX, y3dips, Sm0ke, Heintz, slimjim100, Chb  
and anyone else who know me!  
Greetings to Raido Kerna.  
Tervitusi Torufoorumi rahvale!  
  
Contact:  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
  
[email protected]  
Janek Vind "waraxe"  
  
Homepage: http://www.waraxe.us/  
  
  
Shameless advertise:  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
  
SHA Hash Calculator - http://sha1-hash-online.waraxe.us/  
Biography Database - http://www.biosaxe.com/  
  
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