Schneider Electric Security Notification
EcoStruxure™ OPC UA Server Expert, Modicon Communication Server
11 July 2023 (13 August 2024)

Overview
Schneider Electric is aware of a vulnerability in its EcoStruxure™ OPC UA Server Expert
product.
EcoStruxure™ OPC UA Server Expert is a communications platform seamlessly linking
Schneider Electric PLCs and connected devices to enterprise information systems and theIndustrial Internet of Things (IIoT) via the OPC Foundation’s Open Platform Communications –Unified Architecture (OPC UA) service-oriented architecture standard.
Modicon Communication Server manages the communication configuration between Modicon
PAC controllers (M340, M580) and Wonderware System Platform. The server embeds thecapabilities of the EcoStruxure™ OPC Server Expert (for Modicon Controllers only) to make all
the variables selected for the HMI available within the supervision.
Failure to apply the remediation provided below may risk confidentiality, which could result in
disclosure of sensitive information from the system running the software.
August 2024 Update: Modicon Communication Server offer was added to the Affected Products
and Versions table and a remediation is now available on Modicon Communication Server(page 2).

Affected Products and Versions
ProductVersionEcoStruxure™ OPC UA Server Expert

Versions prior to SV2.01 SP2Modicon Communication Server

Versions prior to SV2.01 SP2Vulnerability Details
CVE ID: CVE-2023-37200
CVSS v3.1 Base Score 5.5 | Medium | AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CWE-611: Improper Restriction of XML External Entity Reference vulnerability exists that could
cause loss of confidentiality when replacing a project file on the local filesystem and after
manual restart of the server.
Note regarding vulnerability details: The severity of vulnerabilities was calculated using theCVSS Base metrics in version 3.1 (CVSS v3.1) without incorporating the Temporal andEnvironmental metrics. Schneider Electric recommends that customers score the CVSS
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Schneider Electric Security Notification
Environmental metrics, which are specific to end-user organizations, and consider factors suchas the presence of mitigations in that environment. Environmental metrics may refine therelative severity posed by the vulnerabilities described in this document within a customer’s
environment.

Remediation
Affected Product &Version

Remediation

EcoStruxure™ OPC
UA Server Expert
Versions prior toSV2.01 SP2Version SV2.01 SP2 of EcoStruxure™ OPC UA Server Expert
includes a fix for this vulnerability and is available for download here:
https://www.se.com/ww/en/product-range/66388-ecostruxure-opc-uaserver-expert/ - software-and-firmware

ModiconCommunication
ServerVersions prior toSV2.01 SP2Version SV2.01 SP2 of Modicon Communication Server includes a fixfor this vulnerability and is available for download here:
https://www.se.com/ww/en/product-range/66388-ecostruxure-opc-uaserver-expert/ - software-and-firmware

Customers should use appropriate patching methodologies when applying these patches totheir systems. We strongly recommend the use of back-ups and evaluating the impact of thesepatches in a Test and Development environment or on an offline infrastructure. Contact
Schneider Electric’s Customer Care Center if you need assistance removing a patch.
If customers choose not to apply the remediation provided above, they should immediately
apply the following mitigations to reduce the risk of exploit:••••

Follow workstation, network, and site-hardening guidelines in the Recommended
Cybersecurity Best Practices Guide available for download here.
Only open project configuration files received from a trusted source.
Encrypt project configuration files when stored and restrict access to only trusted users.
When exchanging files over network, use secure communication protocols.

General Security Recommendations
We strongly recommend the following industry cybersecurity best practices.
•••

Locate control and safety system networks and remote devices behind firewalls andisolate them from the business network.
Install physical controls so no unauthorized personnel can access your industrial control
and safety systems, components, peripheral equipment, and networks.
Place all controllers in locked cabinets and never leave them in the “Program” mode.

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Schneider Electric Security Notification
••
•
•
•

Never connect programming software to any network other than the network intended forthat device.
Scan all methods of mobile data exchange with the isolated network such as CDs, USBdrives, etc. before use in the terminals or any node connected to these networks.
Never allow mobile devices that have connected to any other network besides theintended network to connect to the safety or control networks without proper sanitation.
Minimize network exposure for all control system devices and systems and ensure thatthey are not accessible from the Internet.
When remote access is required, use secure methods, such as Virtual Private Networks(VPNs). Recognize that VPNs may have vulnerabilities and should be updated to themost current version available. Also, understand that VPNs are only as secure as theconnected devices.

For more information refer to the Schneider Electric Recommended Cybersecurity BestPractices document.

Acknowledgements
Schneider Electric recognizes the following researcher for identifying and helping to coordinate
a response to this vulnerability:
CVE

Researcher

CVE-2023-37200

Jin Huang, ADLab of Venustech

For More Information
This document provides an overview of the identified vulnerability or vulnerabilities and actions
required to mitigate. For more details and assistance on how to protect your installation, contact
your local Schneider Electric representative or Schneider Electric Industrial CybersecurityServices: https://www.se.com/ww/en/work/solutions/cybersecurity/. These organizations will befully aware of this situation and can support you through the process.
For further information related to cybersecurity in Schneider Electric’s products, visit thecompany’s cybersecurity support portal page:https://www.se.com/ww/en/work/support/cybersecurity/overview.jsp

LEGAL DISCLAIMER
THIS NOTIFICATION DOCUMENT, THE INFORMATION CONTAINED HEREIN, AND ANY MATERIALSLINKED FROM IT (COLLECTIVELY, THIS “NOTIFICATION”) ARE INTENDED TO HELP PROVIDE AN
OVERVIEW OF THE IDENTIFIED SITUATION AND SUGGESTED MITIGATION ACTIONS,REMEDIATION, FIX, AND/OR GENERAL SECURITY RECOMMENDATIONS AND IS PROVIDED ON AN“AS-IS” BASIS WITHOUT WARRANTY OR GUARANTEE OF ANY KIND. SCHNEIDER ELECTRIC

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DISCLAIMS ALL WARRANTIES RELATING TO THIS NOTIFICATION, EITHER EXPRESS OR IMPLIED,INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
SCHNEIDER ELECTRIC MAKES NO WARRANTY THAT THE NOTIFICATION WILL RESOLVE THEIDENTIFIED SITUATION. IN NO EVENT SHALL SCHNEIDER ELECTRIC BE LIABLE FOR ANYDAMAGES OR LOSSES WHATSOEVER IN CONNECTION WITH THIS NOTIFICATION, INCLUDINGDIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIALDAMAGES, EVEN IF SCHNEIDER ELECTRIC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCHDAMAGES. YOUR USE OF THIS NOTIFICATION IS AT YOUR OWN RISK, AND YOU ARE SOLELYLIABLE FOR ANY DAMAGES TO YOUR SYSTEMS OR ASSETS OR OTHER LOSSES THAT MAYRESULT FROM YOUR USE OF THIS NOTIFICATION. SCHNEIDER ELECTRIC RESERVES THE RIGHTTO UPDATE OR CHANGE THIS NOTIFICATION AT ANY TIME AND IN ITS SOLE DISCRETION.
About Schneider ElectricSchneider’s purpose is to empower all to make the most of our energy and resources, bridging progress andsustainability for all. We call this Life Is On.
Our mission is to be your digital partner for Sustainability and Efficiency.
We drive digital transformation by integrating world-leading process and energy technologies, end-point to cloudconnecting products, controls, software and services, across the entire lifecycle, enabling integrated company
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We are the most local of global companies. We are advocates of open standards and partnership ecosystems thatare passionate about our shared Meaningful Purpose, Inclusive and Empowered values.
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Revision Control:
Version 1.0.0
11 July 2023

Original Release

Version 2.0.0
13 August 2024

Modicon Communication Server offer added theaffected product table. A remediation is now
available on Modicon Communication Server (page2)

CPCERT

11-Jul-23 (13-Aug-24)

Digitally signed by CPCERT
Date: 2024.08.12 12:18:39 -04'00'

Document Reference Number – SEVD-2023-192-02 (v2.0.0)

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