Schneider Electric Security Notification
Web Server on Modicon M340, Legacy Offers Modicon Quantum
Modicon Premium and associated Communication Modules
8 December 2020 (13 September 2022)

Overview
Schneider Electric is aware of a vulnerability in its Modicon M340, Modicon Quantum andModicon Premium legacy offers and associated communication modules.
The Modicon Ethernet Programmable Automation controller products are controllers forindustrial process and infrastructure.
Failure to apply the remediations provided below may risk a Denial-of-Service attack, which
could result in the unavailability of the web and FTP services.
September 2022 update: A fix is available for Modicon M340 X80 Ethernet Communication
Module BMXNOC0401 (page 2).

Affected Products and Versions
ProductVersion

Modicon M340 CPUsBMXP34* versions prior to V3.30

Modicon M340 X80 Ethernet
Communication Modules

BMXNOE0100 (H) versions prior to V3.4
BMXNOE0110 (H) versions prior to V6.5
BMXNOC0401 (H) versions prior to V2.11

Modicon Quantum Communication
Modules140NOE771x1 versions prior to V7.3
140NOC78x00 all versions
140NOC77101 all versions

Modicon Quantum Processors with
Integrated Ethernet COPRO

140CPU65xx0 all versions

Modicon Premium Communication
ModulesModicon Premium Processors withIntegrated Ethernet COPROTSXETY4103 all versions
TSXETY5103 all versions
TSXP574634 all versions
TSXP575634 all versions
TSXP576634 all versions

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Schneider Electric Security Notification
Vulnerability Details
CVE ID: CVE-2020-7549
CVSS v3.0 Base Score 5.3 | Medium | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists that
could cause denial of HTTP and FTP services when a series of specially crafted requests issent to the controller over HTTP.

Remediation
This vulnerability has been fixed or mitigated in the versions below.
Affected Product & Version

Remediation/Mitigation

M340 CPU BMXP34
versions prior to V3.30

Firmware V3.30 is available for all the product references.
Follow this link and find the right firmware file based on modelused:
https://www.se.com/ww/en/product-range/1468-modiconm340/?parent-subcategory-id=3950
If customers choose not to apply the remediation, see Mitigation
section below.

Modicon M340 Ethernet
Communication Modules
BMXNOE0100
versions prior to V3.4

Modicon M340 Ethernet
Communication Modules
BMXNOE0110
versions prior to V6.6

Modicon M340 Ethernet
Communication Modules
BMXNOC0401 (H)versions prior to V2.11

Firmware V3.4 is available for download below:
https://www.se.com/ww/en/download/document/BMXNOE010
0 Exec and Release Notes/
If customers choose not to apply the remediation, see Mitigation
section below.

Firmware V6.6 is available for download below:
https://www.se.com/ww/en/download/document/BMXNOE011
0 Exec and Release Notes/
If customers choose not to apply the remediation, see Mitigation
section below.

Firmware V2.11 is available for download below:
https://www.se.com/ww/en/product/BMXNOC0401/ethernettcp-ip-network-module-modicon-m340-automation-platform-4x-rj45-10-100/
If customers choose not to apply the remediation, see Mitigation
section below.

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Schneider Electric Security Notification
Modicon Quantum
Communication Modules
140NOE771x1
versions prior to V7.3

Modicon QuantumCommunication Modules:
140NOC78x00 all versions
140NOC77101 all versions

Modicon Quantum
Processors with Integrated
Ethernet COPRO
140CPU65xx0 all versions

Modicon PremiumCommunication Modules:
TSXETY4103 all versions
TSXETY5103 all versions

Firmware V7.3 is available for download below:
https://www.se.com/ww/en/download/document/140NOE7710
1 Exec and Release Notes/
If customers choose not to apply the remediation, see Mitigation
section below.
Modicon Quantum and associated communication Modules:
Schneider Electric’s Modicon Quantum controllers have reachedtheir end of life and are no longer commercially available. They havebeen replaced by the Modicon M580 ePAC controller, our mostcurrent product offer. Customers should strongly consider migrating
to the Modicon M580 ePAC. Please contact your local Schneider
Electric technical support for more information.
To mitigate the risks, users should immediately:• Disable the Web server using 'Web Access (HTTP)' via
UnityPro / EcoStruxure Control Expert using the following
guideline “ Quantum using EcoStruxure™ Control Expert TCP/IP Configuration, User Manual” in the chapter “Security(Enable / Disable HTTP, FTP, and TFTP)”:https://www.se.com/ww/en/download/document/33002479K
01000
For further information, please check the “Quantum using
EcoStruxure™ Control Expert - TCP/IP Configuration, User Manual”
and the Modicon Controllers Platform Cyber Security Reference
Manual.

Modicon Premium and associated communication Modules:
Schneider Electric’s Modicon Premium controllers have reachedtheir end of life and are no longer commercially available. They havebeen replaced by the Modicon M580 ePAC controller, our mostcurrent product offer. Customers should strongly consider migrating
to the Modicon M580 ePAC. Please contact your local Schneider
Electric technical support for more information.

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Schneider Electric Security Notification•Modicon PremiumProcessors with Integrated
Ethernet COPRO:TSXP574634 all versions
TSXP575634 all versions
TSXP576634 all versions

Disable the Web server using 'Web Access (HTTP)' via
UnityPro / EcoStruxure Control Expert using the following
guideline “Premium and Atrium using EcoStruxure™ Control
Expert - Ethernet Network Modules, User Manual” in thechapter “Security Service Configuration Parameters /Security (Enable / Disable HTTP, FTP, and TFTP)”:https://www.se.com/ww/en/download/document/35006192K
01000

For further information, please check the “Premium and Atrium using
EcoStruxure™ Control Expert - Ethernet Network Modules, UserManual” and the Modicon Controllers Platform Cyber Security
Reference Manual https://download.schneiderelectric.com/files?p_enDocType=User+guide&p_File_Name=EIO00
00001999.07.pdf&p_Doc_Ref=EIO0000001999.

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.
Customers are advised that the web server is disabled by default. Because web services are
only necessary for specific maintenance, configuration, or monitoring activities, it is advised todisable web services all together during times when the services are not needed.

Mitigation
If customers choose not to apply the remediation provided above and for products whereremediation is not available, they should immediately apply the following mitigations to reduce
the risk of exploit:
Modicon M340 CPU BMXP34* and Ethernet communication modules
To mitigate the risks, users should immediately:••Configure the Access Control List following the recommendations of the user manual“Modicon M340 for Ethernet Communications Modules and Processors User Manual” inchapter “Messaging Configuration Parameters”:
https://www.se.com/ww/en/download/document/31007131K01000/
Disable the Web server using 'Web Access (HTTP)' via UnityPro / EcoStruxure Control
Expert using the following guideline: “Modicon M340 for Ethernet - Communication
Modules and Processors, User Manual” in the chapter “Security / Security features”:
https://www.se.com/ww/en/download/document/31007131K01000.
This is disabled by default when a new application is created

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Schneider Electric Security Notification
Modicon Quantum Communication Modules140NOE771x1 versions prior to V7.3:
Disable the Web server using 'Web Access (HTTP)' via UnityPro / EcoStruxure Control Expert
using the following guideline “ Quantum using EcoStruxure™ Control Expert - TCP/IPConfiguration, User Manual” in the chapter “Security (Enable / Disable HTTP, FTP, and TFTP)”:https://www.se.com/ww/en/download/document/33002479K01000
For further information, please check the “Quantum using EcoStruxure™ Control Expert TCP/IP Configuration, User Manual” and the Modicon Controllers Platform Cyber Security
Reference Manual

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, USB
drives, 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.

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. These organizations will be fully aware of this situation and can support you throughthe process.
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Schneider Electric Security Notification
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 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 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
At Schneider, we believe access to energy and digital is a basic human right. We empower all to do more with less,ensuring Life Is On everywhere, for everyone, at every moment.
We provide energy and automation digital solutions for efficiency and sustainability. We combine world-leading energy
technologies, real-time automation, software and services into integrated solutions for Homes, Buildings, Data Centers,
Infrastructure and Industries.
We are committed to unleash the infinite possibilities of an open, global, innovative community that is passionate with
our Meaningful Purpose, Inclusive and Empowered values.
www.se.com

Revision Control:
Version 1
8 December 2020

Original Release

Version 2.0
13 September 2022

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

signed by Product Security Office
Product Security Office Digitally
Date: 2022.09.09 15:54:00 -04'00'
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