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Mezzanine 4.1.0 Arbitrary File Upload

Mezzanine 4.1.0 Arbitrary File Upload
Posted Feb 3, 2016
Authored by hyp3rlinx | Site hyp3rlinx.altervista.org

Mezzanine version 4.1.0 suffers from an arbitrary file upload vulnerability.

tags | exploit, arbitrary, file upload
SHA-256 | 813b0be41d38f600989de17d7d0f45a37145bc000e505054e9460f3620e40ca3

Mezzanine 4.1.0 Arbitrary File Upload

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[+] Credits: hyp3rlinx

[+] Website: hyp3rlinx.altervista.org

[+] Source:
http://hyp3rlinx.altervista.org/advisories/MEZZANINE-CMS-ARBITRARY-FILE-UPLOAD.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:
=====================
Arbitrary File Upload



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



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

Issue is within the`FILEBROWSER_EXTENSIONS` setting. This setting was
previously only used client-side
and was not validated server-side, allowing local malicious users ability
to bypass file check for uploads
resulting in arbitrary file types like .htaccess, .EXE and .sh being
uploaded to the system.



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

Tested following arbitrary file uploads successfully .htaccess, .sh, .EXE
...

[26/Jan/2016 11:39:24] "GET
/asset_proxy/?u=/static/filebrowser/uploadify/uploadify.swf HTTP/1.1" 200
22894
[26/Jan/2016 11:39:28] "POST /admin/media-library/check_file/ HTTP/1.1" 200
2

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



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



Exploitation Technique:
=======================
Local



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



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


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
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