Message-ID: <561F9CCB.8090808@vulnerability-lab.com>
Date: Thu, 15 Oct 2015 14:32:11 +0200
From: Vulnerability Lab <research@...nerability-lab.com>
To: fulldisclosure@...lists.org
Subject: [FD] Freemake Video Downloader 3.7.1 - Code Execution Vulnerability

Document Title:
===============
Freemake Video Downloader 3.7.1 - Code Execution Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1617


Release Date:
=============
2015-10-12


Vulnerability Laboratory ID (VL-ID):
====================================
1617


Common Vulnerability Scoring System:
====================================
8.8


Product & Service Introduction:
===============================
Freemake YouTube Downloader is a free software to download online videos to PC free and fast. Download videos from YouTube, Facebook, Dailymotion, 
Vevo, Vimeo, and 10,000+ sites. You can grab any streaming video in original quality or convert it to MP3, AVI, MKV, WMV, 3GP, or for iPhone, iPod, 
PSP, Android. Easy setup, no fees, no signup, no limitations.

(Copy of the Vendor Homepage: http://www.freemake.com/free_video_downloader/ )


Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered a code execution vulnerability in the official FreemakeVideoDownloader v3.7.1 software.


Vulnerability Disclosure Timeline:
==================================
2015-10-12: Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Freemake
Product: Freemake Video Downloader - Software (Windows) 3.7.1


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


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


Technical Details & Description:
================================
A code execution web vulnerability has been discovered in the official FreemakeVideo Converter v4.1.7 software.
The vulnerability allows an attacker to execute malicious codes by interaction with a vulnerable software input field.

The security vulnerability is present in the `paste url` module of the software. The download module does not filter the file type .php and 
thus finally allows an attacker to execute for example the calculator. The vulnerability can be exploited by local attackers without interaction.
The severity of the issue is high and the bug can be exploited because of a misconfigured file validation mechanism.

The security risk of the code execution vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 8.8.
Exploitation of the vulnerability requires a low privilege system user account and no user interaction. Successful exploitation of the software
vulnerability results in system compromise by a classic url code execution.

Vulnerable Module(s):
			[+] Download

Vulnerable Input(s):
			[+] paste url

Affected Module(s):
			[+] .php


Proof of Concept (PoC):
=======================
The code execution vulnerability can be exploited by local attackers with restricted system user account and without user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.

Manual steps to reproduce the vulnerability ...
1. Launch your browser and paste your malicious link in your url input field (Do not process to open your link yet!)
2. Run Freemake VideoDownloader.exe
3. Click paste url
4. The php code executes successful after usage of the url paste
5. Successful reproduce of the code execution vulnerability!

PoC: Exploit
<?php
#######################################
#    Code Execution Calculator        #
# By ZwX in the Vulnerability Lab.com #
#######################################
eval(base64_decode('ZXZhbChiYXNlNjRfZGVjb2RlKCdaWFpoYkNoaVlYTmxOalJmWkdWamIy
UmxLQ2RhV0doc1dYbG5ibEY2Y0dOV01HeFBVa1U1V0ZVeGVIcGxXRTR3V2xjd2VrMXNlR3BaVjNo
cVRHMVdORnBUWTNCUGR6MDlKeWtwT3c9PScpKTs='));
?>



Security Risk:
==============
The security risk of the code execution web vulnerability in the software core is estimated as high. (CVSS 8.8)


Credits & Authors:
==================
ZwX - (http://zwx.fr) [ http://www.vulnerability-lab.com/show.php?user=ZwX ]


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