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[Full-disclosure] Lepton v1.2.0 CMS - Multiple Web Vulnerabilities

Title:
======
Lepton v1.2.0 CMS - Multiple Web Vulnerabilities


Date:
=====
2012-06-23


References:
===========
http://www.vulnerability-lab.com/get_content.php?id=626


VL-ID:
=====
626


Common Vulnerability Scoring System:
====================================
4


Introduction:
=============
LEPTON is an easy-to-use but full customizable Content Management System (CMS). 
LEPTON enables you to run nearly all 
the websites most others current CMS promise you but has the big advantage of 
extremely short learning and training 
curves, and this is a great argument to those who work with LEPTON. LEPTON 
needs a MySQL database, the most common 
database on webspaces. LEPTON is easily installed and started, and - what is 
really important - can easily be adapted 
to fit the needs of nearly all web appearences. Besides many other features 
LEPTON got  ...

    easy to use backend
    content input via wysiwyg-editors
    multi-language-support
    file and media management
    design via template system
    addons to extend cms
    scaling access system
    and much more...

(Copy of the Vendor Homepage: http://www.lepton-cms.org/english.php?lang=EN )


Abstract:
=========
The Vulnerability Laboratory Research Team discovered multiple Web 
Vulnerabilities in the Lepton v1.2.0 Content Management System.


Report-Timeline:
================
2012-06-23:     Public or Non-Public Disclosure


Status:
========
Published


Exploitation-Technique:
=======================
Remote


Severity:
=========
Medium


Details:
========
Multiple persistent input validation vulnerabilities are detected in iScripts 
Reserve Logic v1.2 Booking Content Management System.
The bugs allow remote attackers to implement/inject malicious script code on 
the application side (persistent). The persistent 
vulnerabilities are located in the modify groups, add user, listing, Profile & 
add page module(s) with the bound vulnerable parameters 
Groupname, Username, Display Name & list_page_title. Exploitation requires low 
user inter action & privileged application user account. 
Successful exploitation of the vulnerability can lead to session hijacking 
(admin) or stable (persistent) context manipulation. 


Vulnerable Module(s):
                                [+] Modify Groups - Group
                                [+] Access - Add User
                                [+] Preferences - My Settings - Profile
                                [+] Add Page

Vulnerable Parameter(s):
                                [+] Group Name
                                [+] Username
                                [+] Display Name
                                [+] list_page_title & url (modify_link)


Proof of Concept:
=================
The persistent web vulnerabilities can be exploited by remote attacker with 
privileged user account or without user account.
To exploit the vulnerability low or medium user inter action is required. For 
demonstration or reproduce ...


Review: Access - Add User > Username

<form name="user" 
action="http://demo.xxx.com/lepton/admins/users/add.php?leptoken=462c08f506b7992a08a40z1340321337";
 method="post" class="">
<input name="user_id" value="" type="hidden">
<input name="username_fieldname" value="username_Age0ll2" type="hidden">
<p>Minimum length for user name: 3 chars, Minimum length for Password: 6 
chars!</p>
<table 0"="" border="0" cellpadding="0 cellspacing=" width="100%">
<tbody><tr>
<td width="150">Username:</td>
<td class="value_input">
<input name="username_Age0ll2" value="\" type="text"><[PERSISTENT INJECTED 
SCRIPT CODE])' <"="">
</td>
</tr>
<tr>
<td>Password:</td>
<td class="value_input">
<input type="password" name="password" value=""><[PERSISTENT INJECTED SCRIPT 
CODE]) <" />
</td>
</tr>
<tr>
<td>Re-type Password:</td>
<td class="value_input">
<input type="password" name="password2" value=""><[PERSISTENT INJECTED SCRIPT 
CODE]<" />
</td>


URL: 
http://127.0.0.1:8080/lepton/admins/users/index.php?leptoken=0644c1632f2de642c422az1340321400



Review: Preferences - My Settings - Profile > Displayname

<optgroup label="Pages"><option value="pages/modify.php?page_id=2" 
selected="selected">
"><[PERSISTENT INJECTED SCRIPT CODE]<</option>
<option value="pages/modify.php?page_id=1">hello world</option>
</optgroup></select>


URL: 
http://127.0.0.1:8080/lepton/admins/preferences/index.php?leptoken=43842ae95ec290c5dc346z1340321767




Review: Modify Groups - Group

<table border="0" cellpadding="2" cellspacing="0" width="100%">
<tbody><tr>
<td width="150">Name:</td>
<td>
<input name="group_name" maxlength="255" type="text"><[PERSISTENT INJECTED 
SCRIPT CODE]' <"="" style="width: 98%;">
</td>


URL: 
http://127.0.0.1:8080/lepton/admins/groups/groups.php?leptoken=b966d35413402c86743a7z1340321327




Review: Add Page - Listing (url or link)

<img src="index.php2-Dateien/visible_16.png" alt="Visibility: Public" 
class="page_list_rights">
<span class="modify_link">"><[PERSISTENT INJECTED SCRIPT CODE]") <</span></a>
</td>
<td class="list_page_title">"><[PERSISTENT INJECTED SCRIPT CODE]") <</td>
<td class="list_page_URL">/hello-world/[PERSISTENT INJECTED SCRIPT 
CODE]28vl29.php</td>        
<td class="list_page_id">2</td>


URL: 
http://127.0.0.1:8080/lepton/admins/pages/index.php?leptoken=aa02a5f10be74d8702542z1340321827


Risk:
=====
The security risk of the persistent input validation vulnerabilities are 
estimated as medium.


Credits:
========
Vulnerability Laboratory [Research Team]  - Benjamin Kunz Mejri 
(bkm@xxxxxxxxxxxxxxxxxxxxx)
Vulnerability Laboratory [Research Team]  - Ibrahim El-Sayed [storm] 
(strom@xxxxxxxxxxxxxxxxxxxxx)


Disclaimer:
===========
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capability for a particular purpose. Vulnerability-
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profits or special damages, even if Vulnerability-Lab or its suppliers have 
been advised of the possibility of such damages. Some 
states do not allow the exclusion or limitation of liability for consequential 
or incidental damages so the foregoing limitation 
may not apply. 

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                                                Copyright © 2012 
Vulnerability-Lab



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