Intel Media Server Studio - Improper Directory Permissions

Document Title:
===============
Intel Media Server Studio - Improper Directory Permissions


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2170

Security ID:: INTEL-SA-00197

https://nvd.nist.gov/vuln/detail/CVE-2018-3697
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-3697

Acknowledgements: www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00197.html

Public Press:
https://threatpost.com/intel-patches-privilege-escalation-bugs/140665/
https://www.scmagazineuk.com/intel-patches-flaws-lead-privilege-escalation/article/1522717
https://latesthackingnews.com/2019/01/11/intel-patches-multiple-security-flaws-fixes-rolled-out-alongside-patch-tuesday/

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-3697

CVE-ID:
=======
CVE-2018-3697


Release Date:
=============
2018-11-21


Vulnerability Laboratory ID (VL-ID):
====================================
2170


Common Vulnerability Scoring System:
====================================
5.1


Vulnerability Class:
====================
Privilege Escalation


Current Estimated Price:
========================
1.000€ - 2.000€


Product & Service Introduction:
===============================
Innovate and optimize enterprise-grade video delivery and cloud graphics applications and solutions for data center, cloud, and network usages.

- Deliver fast, high-quality real-time video transcoding in broadcasting, over-the-top (OTT) live and video on demand (VOD) and in cloud gaming and remote desktop solutions.
- Access hardware accelerated codecs and programmable graphics on the latest Intel® processors.
- Speed the transition to higher frame rates and resolutions.
- Reduce infrastructure and development costs.
- Optimize solutions with advanced performance and quality analyzers.

(Copy of the Vendor : https://software.intel.com/en-us/intel-media-server-studio )


Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered a local privilege escalation vulnerability via improper directory permissions in the Intel Media Server Studio software.



Vulnerability Disclosure Timeline:
==================================
04/04/2018: Researcher Notification & Coordination (SaifAllah benMassaoud)
06/04/2018: Add More Informations (SaifAllah benMassaoud)
11/04/2018: Vendor Response/Feedback (Intel PSIRT)
24/04/2018: Report Triaged (Intel PSIRT)
30/04/2018: Vendor Fix/Patch (Intel Developer Team)
11/13/2018: Security Acknowledgements (Intel PSIRT)
19/11/2018: Public Disclosure (Vulnerability Laboratory)


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


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

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


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


Authentication Type:
====================
Restricted Authentication (Guest Privileges)


User Interaction:
=================
No User Interaction


Disclosure Type:
================
Independent Security Research


Technical Details & Description:
================================
A local privilege escalation has been discovered in the official Intel Media Server Studio software.
The vulnerability is located in "intel SDK for OpenCL applications component" and allows unprivileged 
users to potentially enable an escalation of privilege via local access.

The issue is located in the misconfigured permission values in the users authenticated users group. 
The group/user permission of the path is assigned to the authenticated users group. Local attackers 
are able to elevate the access permission of the software process by successful exploitation via 
process injection attack.


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

--- Session Logs (OpenCL - PERMISSIONS) ---
  Medium Mandatory Level (Default) [No-Write-Up]
  RW BUILTINAdministrateurs
        FILE_ALL_ACCESS
  RW AUTORITE NTSystÞme
        FILE_ALL_ACCESS
  R  BUILTINUtilisateurs
        FILE_LIST_DIRECTORY
        FILE_READ_ATTRIBUTES
        FILE_READ_EA
        FILE_TRAVERSE
        SYNCHRONIZE
        READ_CONTROL
  RW AUTORITE NTUtilisateurs authentifiÚs 
        FILE_ADD_FILE
        FILE_ADD_SUBDIRECTORY
        FILE_LIST_DIRECTORY
        FILE_READ_ATTRIBUTES
        FILE_READ_EA
        FILE_TRAVERSE
        FILE_WRITE_ATTRIBUTES
        FILE_WRITE_EA
        DELETE
        SYNCHRONIZE
        READ_CONTROL

--- Session Logs (OpenCL&sdk - PERMISSIONS) ---
  Medium Mandatory Level (Default) [No-Write-Up]
  RW BUILTINAdministrateurs
        FILE_ALL_ACCESS
  RW AUTORITE NTSystÞme
        FILE_ALL_ACCESS
  R  BUILTINUtilisateurs
        FILE_LIST_DIRECTORY
        FILE_READ_ATTRIBUTES
        FILE_READ_EA
        FILE_TRAVERSE
        SYNCHRONIZE
        READ_CONTROL
  RW AUTORITE NTUtilisateurs authentifiÚs 
        FILE_ADD_FILE
        FILE_ADD_SUBDIRECTORY
        FILE_LIST_DIRECTORY
        FILE_READ_ATTRIBUTES
        FILE_READ_EA
        FILE_TRAVERSE
        FILE_WRITE_ATTRIBUTES
        FILE_WRITE_EA
        DELETE
        SYNCHRONIZE
        READ_CONTROL


Solution - Fix & Patch:
=======================
For users who are able to update their systems, Intel recommends updating to the 2019 Beta Release or later.

Updates are available for download at this location: https://software.intel.com/en-us/blogs/2018/10/05/2019-opencl-sdk-whats-new


Security Risk:
==============
The security risk of the local privilege escalation vulnerability in the Intel Media Server Studio software for microsoft windows is estimated as medium.


Credits & Authors:
==================
S.AbenMassaoud [[email protected]] - https://www.vulnerability-lab.com/show.php?user=S.AbenMassaoud


Disclaimer & Information:
=========================
The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties, 
either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab 
or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business profits 
or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some states do 
not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply. 
We do not approve or encourage anybody to break any licenses, policies, deface websites, hack into databases or trade with stolen data.

Domains:    www.vulnerability-lab.com		www.vuln-lab.com				www.vulnerability-db.com
Services:   magazine.vulnerability-lab.com	paste.vulnerability-db.com 			infosec.vulnerability-db.com
Social:	    twitter.com/vuln_lab		facebook.com/VulnerabilityLab 			youtube.com/user/vulnerability0lab
Feeds:	    vulnerability-lab.com/rss/rss.php 	vulnerability-lab.com/rss/rss_upcoming.php 	vulnerability-lab.com/rss/rss_news.php
Programs:   vulnerability-lab.com/submit.php 	vulnerability-lab.com/register.php  vulnerability-lab.com/list-of-bug-bounty-programs.php

Any modified copy or reproduction, including partially usages, of this file requires authorization from Vulnerability Laboratory. 
Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of other 
media, are reserved by Vulnerability-Lab Research Team or its suppliers. All pictures, texts, advisories, source code, videos and other 
information on this website is trademark of vulnerability-lab team & the specific authors or managers. To record, list, modify, use or 
edit our material contact (admin@ or research@) to get a ask permission.

				    Copyright © 2018 | Vulnerability Laboratory - [Evolution Security GmbH]™