Schneider Electric Security Notification
Web Server on Modicon M340, Modicon Quantum and Modicon
Premium Legacy offers and their Communication Modules
10 November 2020 (14 February 2023)

Overview
Schneider Electric is aware of multiple vulnerabilities in the web server of the Modicon M340,
Modicon Quantum and Modicon Premium Legacy offers and their communication modules.
The Modicon Ethernet Programmable Automation products are controllers for industrial process
and infrastructure.
Failure to apply the mitigations provided below may risk write access and the execution ofcommands, which could result in corruption of data, or crash of the web server.
February 2023 Update: A remediation is available on Modicon M340 Ethernet Communication
Modules BMXNOE0100 (H) and BMXNOE0110 (H) (page 3).

Affected Products and Versions
ProductVersions

M340 CPUs

M340 P34x versions prior to V3.40

Modicon Ethernet Communication
Modules

BMXNOE0100 (H) Versions prior to SV03.50
BMXNOE0110 (H) Versions prior to SV06.70
BMXNOC0401 Versions prior to V2.11
BMXNOR0200H Versions prior to V1.7 IR 23

Premium Processors with
Integrated Ethernet COPROTSXP574634, TSXP575634, TSXP576634 Allversions

Premium Communication
Modules140CPU65xxxxx, All versions

Quantum Communication
Modules140NOE771x1 All versions
140NOC78x00 All versions
140NOC77101 All versions

Vulnerability Details
CVE ID: CVE-2020-7562
CVSS v3.0 Base Score 6.3 | Medium | CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:H
A CWE-125: Out-of-Bounds Read vulnerability exists which could cause a segmentation fault ora buffer overflow when uploading a specially crafted file on the controller over FTP.

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Schneider Electric Security Notification
CVE ID: CVE-2020-7563
CVSS v3.0 Base Score 6.3 | Medium | CVSS:3.0 AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:H
A CWE-787: Out-of-bounds Write vulnerability exists which could cause corruption of data, acrash, or code execution when uploading a specially crafted file on the controller over FTP.
CVE ID: CVE-2020-7564
CVSS v3.0 Base Score 6.3 | Medium | CVSS:3.0 AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:H
A CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability
exists which could cause write access and the execution of commands when uploading a
specially crafted file on the controller over FTP.

Remediation
Affected Products

Remediation

M340 CPUsBMXP34xPrior to V3.40

V3.40 of M340 CPUs includes a fix for thesevulnerabilities and is available for download here:
https://www.se.com/ww/en/download/document/BMXP
34xxxxx_SV_xx.xx/

Modicon Ethernet Communication
Modules
BMXNOR0200H
Prior to V1.7 IR 23

V1.70 IR23 of BMXNOR0200H includes a fix for thesevulnerabilities and is available for download here:
https://www.se.com/ww/en/download/document/BMX
NOR0200H_FW/

Modicon Ethernet Communication
Modules
BMXNOC0401
Prior to V2.11

V2.11of BMXNOC0401 includes a fix for thesevulnerabilities and is available for download here:
https://www.se.com/ww/en/product/BMXNOC0401/eth
ernet-tcp-ip-network-module-modicon-m340automation-platform-4-x-rj45-10-100/

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Schneider Electric Security Notification
Version SV03.50 of BMXNOE0100 (H) includes a fix
for these vulnerabilities and is available for download
here:
https://www.se.com/ww/en/download/document/BMX
NOE0100_SV_03.50/

Modicon M340 Ethernet
Communication Modules
BMXNOE0100 (H) Versions Prior toSV03.50
BMXNOE0110 (H) Versions Prior to
SV06.70

Version SV06.70 of BMXNOE0110 (H) includes a fix
for these vulnerabilities and is available for download
here:
https://www.se.com/ww/en/download/document/BMX
NOE0110_SV_06.70/
If customers choose not to apply the remediation, thenthey should immediately apply the following
mitigations to reduce the risk of exploit:• Setup network segmentation and implement a
firewall to block all unauthorized access to port
80/HTTP (Note HTTP is disabled by default).
• Configure the Access Control List following therecommendations of the user manual “Modicon
M340 for Ethernet Communications Modules andProcessors User Manual” in chapter “Messaging
Configuration
Parameters”: https://www.se.com/ww/en/downlo
ad/document/31007131K01000/• Setup a VPN between the Modicon PLC
impacted modules and the engineering
workstation containing EcoStruxure ControlExpert or Process Expert.

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Schneider Electric Security Notification
Schneider Electric’s Modicon Premium controllers
have reached their end of life and are no longer
commercially available. They have been replaced by
the Modicon M580 ePAC controller, our most current
product offer.

Premium processors withintegrated Ethernet COPROTSXP574634, TSXP575634,
TSXP576634, All versions
Premium communication modules
TSXETY4103 All versions
TSXETY5103 All versions

Quantum processors withintegrated Ethernet COPRO
140CPU65xxxxx, All versions
Quantum communicationmodules
140NOE771x1 All versions
140NOC78x00 All versions
140NOC77101 All versions

Customers should strongly consider migrating to theModicon M580 ePAC. Please contact your local
Schneider Electric technical support for more
information.
Customers should immediately apply the following
mitigations to reduce the risk of exploit:• Configure the Access Control List following therecommendations of the user manual “Premiumand Atrium using EcoStruxure™ Control Expert Ethernet Network Modules, User Manual” inchapters “Connection configuration parameters /TCP/IP Services Configuration Parameters /Connection Configuration Parameters”:
https://www.se.com/ww/en/download/document/3
5006192K01000/•Setup network segmentation and implement a
firewall to block all unauthorized access to port
21/TCP
Schneider Electric’s Modicon Quantum controllers
have reached their end of life and are no longer
commercially available. They have been replaced by
the Modicon M580 ePAC controller, our most current
product offer. Customers should strongly consider
migrating to the Modicon M580 ePAC. Please contact
your local Schneider Electric technical support for
more information.
Customers should immediately apply the following
mitigations to reduce the risk of exploit:• Configure the Access Control List feature asmentioned in “Quantum using EcoStruxure™
Control Expert - TCP/IP Configuration, UserManual” in chapter “Software Settings for
Ethernet Communication / Messaging / Quantum
NOE Ethernet Messaging Configuration”:
https://www.se.com/ww/en/download/document/3
3002467K01000/• Setup network segmentation and implement a
firewall to block all unauthorized access to port
21/TCP

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Schneider Electric Security Notification
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.
To ensure you are informed of all updates, including details on affected products andremediation plans, please subscribe to Schneider Electric’s security notification service here:
https://www.schneider-electric.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 for thedevices that it is intended for.
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 these vulnerabilities:
CVE
CVE-2020-7562
CVE-2020-7563
CVE-2020-7564

Researcher
Kai Wang of Fortinet's FortiGuard Labs

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Schneider Electric Security Notification
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, pleasecontact your local Schneider Electric representative or Schneider Electric Industrial
Cybersecurity Services. These organizations will be fully aware of this situation and can support
you through the process.
https://www.se.com/ww/en/work/support/cybersecurity/overview.jsp
https://www.se.com/ww/en/work/services/field-services/industrial-automation/industrialcybersecurity/industrial-cybersecurity.jsp
LEGAL DISCLAIMERTHIS 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 MAY
RESULT 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 Electric
Schneider’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
management, for homes, buildings, data centers, infrastructure and industries.
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

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Schneider Electric Security Notification
Revision Control:
Version 1.0
10 November 2020

Original Release

Version 2.0
10 August 2021

Added remediation for M340 CPU andBMXNOR0200H.

Version 3.0
13 September 2022

A remediation is available for Modicon M340 X80
Ethernet Communication Module BMXNOC0401(page 2).

Version 4.0
14 February 2023

A remediation is available on Modicon M340
Ethernet Communication Modules BMXNOE0100(H) and BMXNOE0110 (H) (page 3).

Digitally signed by ProductProduct Security Office Security Office
Date: 2023.02.13 12:57:59 -05'00'

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