Document Title:
===============
Aures Booking & POS Terminal - Local Privilege Escalation Vulnerability
References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2323
Release Date:
=============
2023-07-17
Vulnerability Laboratory ID (VL-ID):
====================================
2323
Common Vulnerability Scoring System:
====================================
7.2
Vulnerability Class:
====================
Privilege Escalation
Current Estimated Price:
========================
3.000€ - 4.000€
Product & Service Introduction:
===============================
KOMET is an interactive, multifunctional kiosk and specially designed for the
fast food industry. Available as a wall-mounted or
freestanding model, its design is especially adapted to foodservice such as
take-aways or fast food in system catering. The kiosk
features a 27 YUNO touch system in portrait mode, an ODP 444 thermal receipt
printer, a payment terminal and a 2D barcode scanner.
With a click, the customer selects, books, orders, purchases and pays directly
at the kiosk. The system offers the possibility to
manage customer cards and promotions. Queue management can also be optimized.
(Copy of the Homepage:https://aures.com/de/komet/ )
Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered a local kiosk
privilege escalation vulnerability in the operating system of
the Aures Komet Booking & POS Terminal (Windows 10 IoT Enterprise) used by the
german company immergrün franchise gmbh.
Affected Product(s):
====================
Aures Technologies GmbH
Product: Aures Komet Booking & POS Terminal - (KIOSK) (Windows 10 IoT
Enterprise)
Vulnerability Disclosure Timeline:
==================================
2023-05-09: Researcher Notification & Coordination (Security Researcher)
2023-07-17: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Exploitation Technique:
=======================
Local
Severity Level:
===============
High
Authentication Type:
====================
Open Authentication (Anonymous Privileges)
User Interaction:
=================
No User Interaction
Disclosure Type:
================
Responsible Disclosure
Technical Details & Description:
================================
A kiosk mode escalation vulnerability has been discovered in the operating system
of the Aures Komet Booking & POS Terminal
(Windows 10 IoT Enterprise) used by the german company immergrün franchise
gmbh. The security vulnerability allows local attackers
to bypass the kiosk mode to compromise the local file system and applications.
It is possible for local attackers to escalate out of the kiosk mode in the aures
komet booking & pos terminal. Local attackers are
able to use the touch functionalities in the aures komet booking & pos terminal
system to escalate with higher privileges. The security
vulnerability is located in the context menu function of the extended menu on
touch interaction. Attackers with restricted low local
privileged access to the booking service front display are able to execute
files, can unrestricted download contents or exfiltrate
local file-system information of the compromised windows based operating system.
No keyboard or connections are required to manipulate the service booking and
payment terminal. The booking and payment terminal system
vulnerability requires no user user interaction to become exploited and can
only be triggered by local physical device access.
Vulnerable Operating System(s):
[+] Windows 10 (IoT Enterprise)
Affected Component(s):
[+] Context Menu
Affected Function(s):
[+] Web Search
[+] Share (Teilen)
Proof of Concept (PoC):
=======================
The local vulnerability can be exploited by local attackers with physical
device access without user interaction.
For security demonstration or to reproduce the vulnerability follow the
provided information and steps below to continue.
PoC: Sheet
Touch Display => Select Food Item => Highlight Text
=> Open Context Menu => Extend Context Menu => Web-Search
=> Browser => Local File System => Compromised!
Manual steps to reproduce the vulnerability ...
01. First touch the monitor display to move on from standby
02. Select an food item from the menu of immergrün (we recomment the cesar
wraps)
03. Push the information button of the selected food item
04. Push twice via touch to mark the selected food item text
05. Press a third time after you have marked the context by holding it down on
the touch display
06. Now the function context menu of the operating system for highlighted text
appears
07. On the context menu appearing 3 dots to extend the visible function menu
08. Select the web-search or share function for the highlighted content in the
context menu
09. The browser of the operating system opens on the main front screen
10.1 By now you are able to download an execute executables using the browser
without any blacklisting (Unrestricted Web Access - Download of Files)
10.2 Attackers can open websites on the fron display to manipulate the visible content
(Scam & Spam - Web Messages & Web Context)
10.3 Attackers are able to manipulate via browser debugger the web content displayed
from immergrün (Phishing - Formular & Banking Information)
10.4 Attackers are able to access the local file system and compromise it by
reconfiguration with privileged user account (Local File-System - Privilege
Escaltion)
10.5 Attackers are able to infect the local operating system with ransomware or
other malicious programs and scripts (Malware - Ransomware, Keylogger,
Trojan-Banking & Co.)
10.6 Attackers are able to exfiltrate data from the local computer system using
web connecting and available protocols
10.7 Attackers are able to perform man in the middle attacks from the local
computer system
11.0 Successful reproduce of the security vulnerability!
Reference(s): Pictures
- 1.png (Terminal A)
- 2.png (Terminal B)
- 3.png (Escape)
- 4.png (Awareness)
Solution - Fix & Patch:
=======================
The security vulnerabilities can be patched by following steps:
1. Disable the content menu to extend
2. Disable the context menu
3. Disable web-search
4. Disable to mark text inputs & texts
5. Disallow to open not white listed websites
6. Disable to download files
7. Restrict the web-browser access
8. Disallow the file browser
9. Disable the browser debug modus
10. Reconfigure the local firewall to allow and disallow connections
11. Change the access permission to prevent exfiltration
Security Risk:
==============
The security risk of the vulnerability in the local booking and payment
terminal system is considered high.
The issue can be easily exploited by local attackers with simple interaction
via the touch display.
Once compromised, the attackers can fully manipulate the computer's operating
system and use it misuse
it for further simple or more complex attack scenarios.
Credits & Authors:
==================
Benjamin Mejri (Kunz)
-https://www.vulnerability-lab.com/show.php?user=Benjamin+K.M.
Lars Guenther
-https://www.vulnerability-lab.com/show.php?user=L.+Guenther
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: https://www.vulnerability-lab.com ;
https://www.vuln-lab.com ;https://www.vulnerability-db.com
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 © 2023 | Vulnerability Laboratory -
[Evolution Security GmbH]™
--
VULNERABILITY LABORATORY (VULNERABILITY LAB)
RESEARCH, BUG BOUNTY & RESPONSIBLE DISCLOSURE
Attachment:
OpenPGP_0x1554D09B2933E2FE.asc
Description: OpenPGP public key
Attachment:
OpenPGP_signature
Description: OpenPGP digital signature
_______________________________________________ Sent through the Full Disclosure mailing list https://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: https://seclists.org/fulldisclosure/