Date: Mon, 16 Nov 2020 11:10:44 +0100
From: Vulnerability Lab <research@...nerability-lab.com>
To: fulldisclosure@...lists.org
Subject: [FD] Intel NUC - Local Privilege Escalation Vulnerability

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


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

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:
====================================
6.7


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 local
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:
===============
Medium


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 medium.


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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