Symantec VIP Access Desktop Arbitrary DLL Execution

[apparitionsec@xxxxxxxxx.-.hyp3rlinx]

[+] Credits: John Page aka hyp3rlinx    

[+] Website: hyp3rlinx.altervista.org

[+] Source:  
http://hyp3rlinx.altervista.org/advisories/SYMANTEC-VIP-ACCESS-ARBITRARY-DLL-EXECUTION.txt

[+] ISR: ApparitionSec



Vendor:
================
www.symantec.com



Product:
===================
Symantec VIP Access
Desktop versions prior to 2.2.2


Vulnerability Type:
=======================
Arbitrary DLL Execution



CVE Reference:
==============
CVE-2016-6593



Vulnerability Details:
=====================

VIP Access Desktop UI Manager invokes DLLs from the current working folder 
during startup. A malicious local user can create
specifically modified DLLs to replace the normal product DLLs required during 
startup.

Then, by redirecting the startup path of the VIP Access Desktop UI Manager the 
user can cause the VIP Access Desktop
UI Manager to invoke the substituted DLL instead of the required product DLL. 
Any specifically modified code execution
could be performed with logged-on user privileges, which is normally user-level 
access in currently supported operating systems.
Ultimately, this problem is caused by a failure to properly validate required 
product DLLs during start-up.

This could result in a local user being able to manipulate VIP Access Desktop 
to load and execute an arbitrary DLL of the user?s
choice with user-level privileges.

Reference:
https://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=&suid=20161208_00



Disclosure Timeline:
======================================
Vendor Notification:  February 4, 2016
December 8, 2016  : Public Disclosure




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




[+] Disclaimer
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Permission is hereby granted for the redistribution of this advisory, provided 
that it is not altered except by reformatting it, and
that due credit is given. Permission is explicitly given for insertion in 
vulnerability databases and similar, provided that due credit
is given to the author. The author is not responsible for any misuse of the 
information contained herein and accepts no responsibility
for any damage caused by the use or misuse of this information. The author 
prohibits any malicious use of security related information
or exploits by the author or elsewhere.

hyp3rlinx