1. EXECUTIVE SUMMARY
- CVSS v3 3.1
- ATTENTION: Exploitable remotely
- Vendor: Siemens
- Equipment: Mendix
- Vulnerability: Improper Access Control
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an authenticated attacker to extract information from a database protected field.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Mendix, a software platform to build mobile and web applications, are affected:
- Mendix applications using Mendix 7: All versions prior to 7.23.27
- Mendix applications using Mendix 8: All versions prior to 8.18.14
- Mendix applications using Mendix 9: All versions prior to 9.12.0
- Mendix applications using Mendix 9 (9.6): All versions prior to 9.6.3
3.2 VULNERABILITY OVERVIEW
The affected product is vulnerable when querying the database as it is possible to sort the results using a protected field. An authenticated attacker could exploit this vulnerability to extract information.
- CRITICAL INFRASTRUCTURE SECTORS: Multiple Sectors
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: Germany
Siemens reported this vulnerability to CISA.
Siemens has provided the following specific workarounds and mitigations:
- Update Mendix Project to Version 7.23.27 or later
- Update Mendix Project to Version 8.18.14 or later
- Update Mendix Project to Version 9.12.0 or later
- Update Mendix Project to Version 9.6.3 or later (preferably to the latest version 9.12)
As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security, and to follow the recommendations in the product manuals.
Additional information on industrial security by Siemens can be found at: https://www.siemens.com/industrialsecurity
For more information on this vulnerability and more detailed mitigation instructions, please see Siemens Security Advisory SSA-870917
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
- Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the Internet.
- Locate control system networks and remote devices behind firewalls and isolate them from the business network.
- When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its connected devices.
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents.
No known public exploits specifically target this vulnerability. This vulnerability has a high attack complexity.