Zortam MP3 Studio v21.15 - Insecure File Permissions

Document Title:
===============
Zortam MP3 Studio v21.15 - Insecure File Permissions


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=1963


Release Date:
=============
2016-09-28


Vulnerability Laboratory ID (VL-ID):
====================================
1963


Common Vulnerability Scoring System:
====================================
5.4


Product & Service Introduction:
===============================
Zortam Mp3 Media Studio is a great all-in-one music tool for organizing your Mp3/Karaoke collection for editing Mp3 ID3 tags, 
ripping your CD, normalizing Mp3, converts Mp3/Wav and Wav/Mp3, to get song lyric and cover arts from the internet and 
keeping your music collection well organized.

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



Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered an insecure file permission vulnerability in the Zortam MP3 Studio v21.15 software.


Vulnerability Disclosure Timeline:
==================================
2016-09-29:	Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Zortam 
Product: Zortam MP3 Studio - Software 21.15


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


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


Technical Details & Description:
================================
Insecure File Permissions vulnerability has been discovered in the official Zortam MP3 Studio v21.15 software.
The vulnerability exists due to insecure default permissions set on the zPlayer.exe.  

A local attacker could exploit this vulnerability by replacing zPlayer.exe with a malicious executable file.  
The malicious file could execute with the local system user permissions. 



Proof of Concept (PoC):
=======================
Zortam MP3 Studio for windows contains a vulnerability that could allow a local attacker to gain elevated privileges.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below.


-- PoC Exploitation --
C:Program FilesZortam Mp3 Media Studio>cacls zPlayer.exe
C:Program FilesZortam Mp3 Media StudiozPlayer.exe BUILTINUtilisateurs:F

AUTORITE NTSystème:(ID)F
BUILTINAdministrateurs:(ID)F
BUILTINUtilisateurs:(ID)R
AUTORITÉ DE PACKAGE D'APPLICATIONTOUS LES PACKAGES D'APPLICATION:(ID)R


Security Risk:
==============
The security risk of the local  insecure file permission issue in the software core is estimated as medium. (CVSS 5.4)


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


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