Intel NUC - Privilege Escalation Vulnerability

Document Title:
===============
Intel NUC - Privilege Escalation Vulnerability


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2267

Source: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00414.html

News: https://www.facebook.com/asharqnews/videos/1226548307715526

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-24525

CVE-ID:
=======
CVE-2020-24525


Release Date:
=============
2020-11-13


Vulnerability Laboratory ID (VL-ID):
====================================
2267


Common Vulnerability Scoring System:
====================================
7.8


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


Current Estimated Price:
========================
10.000€ - 25.000€


Product & Service Introduction:
===============================
The Intel® NUC kit consists of a customizable mainboard and housing. You can choose from a large selection of memory 
and data storage as well as the operating system.

(Copy of the Homepage: https://www.intel.de/content/www/de/de/products/boards-kits/nuc/kits.html )


Abstract Advisory Information:
==============================
A vulnerability laboratory core team researcher discovered a privilege escalation in the official Intel® NUC.


Affected Product(s):
====================
Intel® NUC

Intel® NUC Board DE3815TYBE with a SA number H27002-500 and later. The SA number is located on the back of the chassis. 
TYBYT20H.86A
Intel® NUC Kit DE3815TYKHE with an AA number H26998-500 and later. The AA number is found on the board’s memory module socket. 
TYBYT20H.86A
Intel® NUC Board DE3815TYBE with the following SA numbers: H27002-400, -401, -402, -404, and -404. The SA number is located on the back of the chassis. 
TYBYT10H.86A
Intel® NUC Kit DE3815TYKHE with the following AA numbers: H26998-401, -402, -403, -404, and -405. The AA number is found on the board’s memory module socket. 
TYBYT10H.86A
Intel® NUC 8 Rugged Kit NUC8CCHKR
CHAPLCEL.0049
Intel® NUC Board NUC8CCHB
CHAPLCEL.0049
Intel® NUC 8 Pro Mini PC NUC8i3PNK
PNWHL357.0037
Intel® NUC 8 Pro Kit NUC8i3PNK
PNWHL357.0037
Intel® NUC 8 Pro Kit NUC8i3PNH
PNWHL357.0037
Intel® NUC 8 Pro Board NUC8i3PNB
PNWHL357.0037
Intel® NUC 9 Pro Kit - NUC9V7QNX
QNCFLX70.34
Intel® NUC 9 Pro Kit - NUC9VXQNX
QNCFLX70.34
Intel® NUC 8 Mainstream-G kit (NUC8i5INH)
INWHL357.0036
Intel® NUC 8 Mainstream-G kit (NUC8i7INH)
INWHL357.0036
Intel® NUC 8 Mainstream-G mini PC (NUC8i5INH)
INWHL357.0036
Intel® NUC 8 Mainstream-G mini PC (NUC8i7INH)
INWHL357.0036


Vulnerability Disclosure Timeline:
==================================
2020-11-13: Public Disclosure (Vulnerability Laboratory)


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


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


Severity Level:
===============
High


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


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


Disclosure Type:
================
Bug Bounty


Technical Details & Description:
================================
Insecure inherited permissions in firmware update tool for some Intel(R) NUCs may allow an authenticated user with 
system privileges to potentially enable an escalation of the local process privilege via local system access.



Solution - Fix & Patch:
=======================
Intel recommends that users update to the latest NUC firmware version (see provided table). Intel recommends 
users update HDMI Firmware Update Tool for NUC7i3DN, NUC7i5DN and NUC7i7DN to an updated version 1.76 via the 
following URL: https://downloadcenter.intel.com/download/27315?v=t


Security Risk:
==============
The security risk of the local privilege escalation vulnerability in the intel nuc is estimated as high.


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


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