Schneider Electric Security Notification
EcoStruxure™ Control Expert, EcoStruxure™ Process Expert andModicon M340, M580 and M580 Safety PLCs
13 February 2024 (13 August 2024)

Overview
Schneider Electric is aware of multiple vulnerabilities in its EcoStruxure™ Control Expert ,EcoStruxure™ Process Expert and Modicon M340, M580 PLCs (Programmable LogicControllers).
Modicon PLCs control and monitor industrial operations. EcoStruxure™ Control Expert is thecommon programming, debugging and operating software for Modicon PLCs. EcoStruxure™
Process Expert DCS is a single automation system to engineer, operate, and maintain an entire
plant Infrastructure.
Failure to apply the remediations provided below may risk unauthorized access to your PLC,
which could result in the possibility of denial of service and loss of confidentiality, integrity of thecontroller.
August 2024 Update: A remediation is available for the Modicon M580 CPU Safety (page 3).

Affected Products and Versions
Product
Modicon M340 CPU(part numbers BMXP34*)
Modicon M580 CPU (partnumbers BMEP* and BMEH*,
excluding M580 CPU Safety)
Modicon M580 CPU Safety(part numbers BMEP58*S andBMEH58*S)
Modicon MC80 (part numbers
BMKC80)Modicon Momentum Unity M1EProcessor (171CBU*)
EcoStruxure™ Control Expert
EcoStruxure™ Process Expert

VersionCVE-202327975

CVE-20236408

Versions prior to SV3.60

x

Versions prior to SV4.20

x

Versions prior to SV4.21x

All versionsx

All versionsx

CVE-20236409

Versions prior to v16.0

x

x

x

Versions prior to v2023xxx

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Schneider Electric Security Notification
Vulnerability Details
CVE ID: CVE-2023-6408
CVSS v3.1 Base Score 8.1 | High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-924: Improper Enforcement of Message Integrity During Transmission in aCommunication Channel vulnerability exists that could cause a denial of service and loss ofconfidentiality, integrity of controllers when conducting a Man in the Middle attack.
CVE ID: CVE-2023-6409
CVSS v3.1 Base Score 7.7 | High | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE-798: Use of Hard-coded Credentials vulnerability exists that could cause unauthorizedaccess to a project file protected with application password when opening the file withEcoStruxure Control Expert.
CVE ID: CVE-2023-27975
CVSS v3.1 Base Score 7.1 | High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE-522: Insufficiently Protected Credentials vulnerability exists that could cause unauthorizedaccess to the project file in EcoStruxure™ Control Expert when a local user tampers with thememory of the engineering workstation.
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
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’senvironment.

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Schneider Electric Security Notification
Remediation
Affected Product &VersionModicon M340 CPU(part numbers
BMXP34*)
Versions prior toSV3.60Modicon M580 CPU(part numbers
BMEP* and BMEH*,excluding M580
CPU Safety)
Versions prior toSV4.20Remediation

CVE

SV3.60 of Modicon M340 firmware includes a fix for thisvulnerability and is available for download here:
https://www.se.com/ww/en/product-range/1468modicon-m340
CVE-20236408
SV4.20 of Modicon M580 firmware includes a fix for thisvulnerability and is available for download here:
https://www.se.com/ww/en/product-range/62098modicon-m580-epac/ - software-and-firmwareFirmware SV4.21 includes a fix for this vulnerability andis available for download here:

CVE-20236408

https://www.se.com/ww/en/product-range/62098modicon-m580-pac-controller/#software-andModicon M580 CPUSafety (part numbers firmware
BMEP58*S andBMEH58*S)
Versions prior toSV4.21

EcoStruxure™
Control Expert
Versions prior to v16.0

Important: customer needs to use version of
EcoStruxure™ Control Expert v16.0 HF001 minimum toconnect with the latest version of M580 CPU Safety. The
software is available for download here:
https://www.se.com/ww/en/product-range/548ecostruxure-control-expert-unity-pro/#software-andfirmware
Version 16.0 of EcoStruxure™ Control Expert includes afix for these vulnerabilities and is available for downloadhere:
https://www.se.com/ww/en/product-range/548ecostruxure-control-expert-unity-pro/

CVE-202327975
CVE-20236408
CVE-20236409

Reboot the computer after installation is completed.
EcoStruxure™
Process Expert
Versions prior tov2023

Version 15.3 HF008 of EcoStruxure™ Control Expert
includes the fix for these vulnerabilities and are availablefor download here:
https://www.se.com/ww/en/product-range/548ecostruxure-control-expert-unity-pro/

CVE-202327975
CVE-20236408
CVE-20236409

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 these

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Schneider Electric Security Notification
patches 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:

Mitigations
Affected Product &VersionMitigations•••

Modicon M340 CPU(part numbersBMXP34*)
Versions prior toSV3.60

•

•

•

•
•
•

Modicon M580 CPU(part numbers
BMEP* and BMEH*,excluding M580 CPU
Safety)Versions prior toSV4.20••

Setup an application password in the project properties
Setup network segmentation and implement a firewall to block all
unauthorized access to port 502/TCP
Configure the Access Control List following the recommendations of theuser manuals: “Modicon M340 for Ethernet Communications Modulesand Processors User Manual” in chapter “Messaging Configuration
Parameters”:
https://www.se.com/ww/en/download/document/31007131K01000/
Setup a secure communication according to the following guideline“Modicon Controllers Platform Cyber Security Reference Manual,” inchapter “Setup secured communications”:
https://www.se.com/ww/en/download/document/EIO0000001999/
Consider use of external firewall devices such as EAGLE40-07 from
Belden to establish VPN connections for M340 & M580 architectures.
For more details refer to the chapter “How to protect M580 and M340
architectures with EAGLE40 using VPN”:
https://www.se.com/ww/en/download/document/EIO0000001999/
Ensure the M340 CPU is running with the memory protection activatedby configuring the input bit to a physical input, for more details refer tothe following guideline “Modicon Controllers Platform Cyber Security
Reference Manual”, “CPU Memory Protection section”:
https://www.se.com/ww/en/download/document/EIO0000001999/
Setup an application password in the project properties
Setup network segmentation and implement a firewall to block all
unauthorized access to port 502/TCP
Configure the Access Control List following the recommendations of theuser manuals: “Modicon M580, Hardware, Reference Manual”:
https://www.se.com/ww/en/download/document/EIO0000001578/
Setup a secure communication according to the following guideline“Modicon Controllers Platform Cyber Security Reference Manual,” inchapter “Setup secured communications”:
https://www.se.com/ww/en/download/document/EIO0000001999/• use a BMENOC module and follow the instructions to configure
IPSEC feature as described in the guideline “Modicon M580 BMENOC03.1 Ethernet Communications Schneider ElectricSecurity Notification Module, Installation and Configuration

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Schneider Electric Security NotificationGuide” in the chapter “Configuring IPSEC communications”:
https://www.se.com/ww/en/download/document/HRB62665/
OR• Use a BMENUA0100 module and follow the instructions to configure
IPSEC feature as described in the chapter “Configuring theBMENUA0100 Cybersecurity Settings”:
https://www.se.com/ww/en/download/document/PHA83350
OR• Consider use of external firewall devices such as EAGLE40-07 from
Belden to establish VPN connections for M340 & M580 architectures.
For more details refer to the chapter “How to protect M580 and M340
architectures with EAGLE40 using VPN”:
https://www.se.com/ww/en/download/document/EIO0000001999/• Ensure the M580 CPU is running with the memory protection activatedby configuring the input bit to a physical input, for more details refer tothe following guideline “Modicon Controllers Platform Cyber Security
Reference Manual”, “CPU Memory Protection section”:
https://www.schneiderelectric.com/en/download/document/EIO0000001999/
NOTE: The CPU memory protection cannot be configured with M580 Hot
Standby CPUs. In such cases, use IPsec encrypted communication.
••••Modicon M580 CPUSafety (part numbers
BMEP58*S andBMEH58*S)
Versions prior toSV4.21

Setup an application password in the project properties
Setup network segmentation and implement a firewall to block all
unauthorized access to port 502/TCP
Configure the Access Control List following the recommendations of theuser manuals: “Modicon M580, Hardware, Reference Manual”:
https://www.se.com/ww/en/download/document/EIO0000001578/
Setup a secure communication according to the following guideline“Modicon Controllers Platform Cyber Security Reference Manual,” inchapter “Setup secured communications”:
https://www.se.com/ww/en/download/document/EIO0000001999/• use a BMENOC module and follow the instructions to configure
IPSEC feature as described in the guideline “Modicon M580 BMENOC03.1 Ethernet Communications Schneider Electric
Security Notification Module, Installation and Configuration
Guide” in the chapter “Configuring IPSEC communications”:
https://www.se.com/ww/en/download/document/HRB62665/

OR• Use a BMENUA0100 module and follow the instructions to configure
IPSEC feature as described in the chapter “Configuring theBMENUA0100 Cybersecurity Settings”:
https://www.se.com/ww/en/download/document/PHA83350
OR• Consider use of external firewall devices such as EAGLE40-07 from
Belden to establish VPN connections for M340 & M580 architectures.
For more details refer to the chapter “How to protect M580 and M340

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Schneider Electric Security Notification•architectures with EAGLE40 using VPN”:
https://www.se.com/ww/en/download/document/EIO0000001999/
Ensure the M580 CPU is running with the memory protection activatedby configuring the input bit to a physical input, for more details refer tothe following guideline “Modicon Controllers Platform Cyber Security
Reference Manual”, “CPU Memory Protection section”:
https://www.schneiderelectric.com/en/download/document/EIO0000001999/

NOTE: The CPU memory protection cannot be configured with M580 Hot
Standby CPUs. In such cases, use IPsec encrypted communication.
• To further reduce the attack surface on Modicon M580 CPU Safety:
Ensure the CPU is running in Safety mode and maintenance input isconfigured to maintain this Safety mode during operation – refer to the
document Modicon M580 - Safety System Planning Guide - in the chapter“Operating Mode Transitions”:
https://www.se.com/ww/en/download/document/QGH60283/•••

Modicon MC80 (partnumbers BMKC80)
All versions••

Modicon Momentum
Unity M1E Processor(part numbers
171CBU*)All versions•••

EcoStruxure™
Control Expert
Versions prior to v16.0

EcoStruxure™
Process Expert
Versions prior tov2023

•
•
•
•

Setup an application password in the project properties
Setup network segmentation and implement a firewall to block all
unauthorized access to port 502/TCP
Configure the Access Control List following the recommendations of theuser manuals:“Modicon MC80 Programmable Logic Controller (PLC) manual” in thechapter “Access Control List (ACL)”:https://www.se.com/ww/en/download/document/EIO0000002071/
Setup a secure communication according to the following guideline“Modicon Controller Systems Cybersecurity, User Guide” in chapter“Set Up Encrypted Communication”:
https://www.se.com/ww/en/download/document/EIO0000001999/
Setup an application password in the project properties
Setup network segmentation and implement a firewall to block all
unauthorized access to port 502/TCP
Setup a secure communication according to the following guideline“Modicon Controller Systems Cybersecurity, User Guide” in chapter“Set Up Encrypted Communication”:
https://www.se.com/ww/en/download/document/EIO0000001999/
Enable encryption on application project and store application files insecure location with restricted access only for legitimate users.
Schneider Electric recommends using McAfee Application and Change
Control software for application control. Refer to the Cybersecurity
Application Note available here.
Follow workstation, network and site-hardening guidelines in theRecommended Cybersecurity Best Practices available for download
here.
EcoStruxure Process Expert manages application files within its
database in secure way. Do not export & store them outside theapplication.
Schneider Electric recommends using McAfee Application and Change
Control software for application control. Refer to the Cybersecurity
Application Note available here.

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Schneider Electric Security Notification•Follow workstation, network and site-hardening guidelines in theRecommended Cybersecurity Best Practices available for download
here.

To ensure you are informed of all updates, including details on affected products andremediation plans, subscribe to Schneider Electric’s security notification service here:
https://www.se.com/en/work/support/cybersecurity/security-notifications.jsp

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.
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 Best
Practices document.

Acknowledgements
Schneider Electric recognizes the following researchers for identifying and helping to coordinate
a response to these vulnerabilities:
CVEResearchers

CVE-2023-6408

Gao Jian

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Schneider Electric Security Notification
CVE-2023-6409

Jianshuang Ding

CVE-2023-27975

Kaikai Yang

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 Cybersecurity
Services: 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 ANOVERVIEW 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 ELECTRICDISCLAIMS 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 companymanagement, for homes, buildings, data centers, infrastructure and industries.

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Schneider Electric Security Notification
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.
www.se.com

Revision Control:
Version 1.0.0
13 February 2024
Version 2.0.0
09 July 2024
Version 3.0.0
13 August 2024

Original Release
Modicon MC80 and Momentum M1E PLCs havebeen identified as impacted by the CVE-20236408. Mitigations are now available.
A remediation is available for the Modicon M580
CPU Safety (page 3).

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