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             AUSCERT External Security Bulletin Redistribution

                               ESB-2022.1712
                 Advisory (icsa-22-104-07) Siemens Mendix
                               20 April 2022

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Siemens Mendix
Publisher:         ICS-CERT
Operating System:  Network Appliance
Resolution:        Patch/Upgrade
CVE Names:         CVE-2022-27241  

Original Bulletin: 
   https://us-cert.cisa.gov/ics/advisories/icsa-22-104-07

Comment: CVSS (Max):  5.3 CVE-2022-27241 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
         CVSS Source: ICS-CERT
         Calculator:  https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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ICS Advisory (ICSA-22-104-07)

Siemens Mendix

Original release date: April 14, 2022

Legal Notice

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is governed by the Traffic Light Protocol (TLP) marking in the header. For more
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1. EXECUTIVE SUMMARY

  o CVSS v3 5.3
  o ATTENTION: Exploitable remotely/low attack complexity
  o Vendor: Siemens
  o Equipment: Mendix
  o Vulnerability: Exposure of Sensitive Information to an Unauthorized Actor

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an unauthenticated
remote attacker to read sensitive data.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Mendix, a software platform to build mobile and web
applications, are affected:

  o Mendix applications using Mendix 7: All versions
  o Mendix applications using Mendix 8: All versions
  o Mendix applications using Mendix 9: All versions prior to 9.11

3.2 VULNERABILITY OVERVIEW

3.2.1 EXPOSURE OF SENSITIVE INFORMATION TO AN UNAUTHORIZED ACTOR CWE-200

Applications built with an affected system publicly expose the internal project
structure. This could allow an unauthenticated remote attacker to read
confidential information.

CVE-2022-27241 has been assigned to this vulnerability. A CVSS v3 base score of
5.3 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:L/I:N/A:N ).

3.3 BACKGROUND

  o CRITICAL INFRASTRUCTURE SECTORS: Multiple Sectors
  o COUNTRIES/AREAS DEPLOYED: Worldwide
  o COMPANY HEADQUARTERS LOCATION: Germany

3.4 RESEARCHER

Siemens reported this vulnerability to CISA.

4. MITIGATIONS

Siemens has provided the following specific workarounds and mitigations:

  o Mendix Applications using Mendix 7: No fix currently planned
  o Mendix Applications using Mendix 8: No fix currently planned
  o Mendix Applications using Mendix9: Update to Version 9.11 or later

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-414513

CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:

  o Minimize network exposure for all control system devices and/or systems,
    and ensure they are not accessible from the Internet .
  o Locate control system networks and remote devices behind firewalls and
    isolate them from the business network.
  o 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.

For any questions related to this report, please contact the CISA at:

Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870

CISA continuously strives to improve its products and services. You can help by
choosing one of the links below to provide feedback about this product.

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