Schneider Electric Security Notification
OPC UA and X80 Advanced RTU
Modicon Communication Modules
12 July 2022 (19 August 2022)

Overview
Schneider Electric is aware of multiple vulnerabilities in its BMENUA0100 - OPC UA moduleand BMENOR2200H X80 Advanced RTU communication module for M580.
The BMENUA0100 - OPC UA module for M580 is an Ethernet communications module with anembedded OPC UA server for communication with OPC UA clients, including SCADA.
The BMENOR2200H – X80 Advanced RTU module is an Ethernet communication module thatenables M580 platform to use RTU protocol exchange with RTU stations.
Failure to apply the mitigations provided below may introduce risks including denial of service of
the webserver and bypass of the secure boot process, which could result in running anunauthorized firmware.
August 19, 2022 Update: There is a remediation for the X80 Advanced RTU Communication
Module (BMENOR2200) (page 4).

Affected Products and Versions
2022-34765

2022-34764

2022-34763

2022-34762

2022-34761

2022-34760

Affected Products and Versions

2022-34759

CVE-OPC UA Modicon Communication Module (BMENUA0100)
V1.10 and prior

X X X X X X X

X80 Advanced RTU Communication Module (BMENOR2200H)
V1.0

X X

X80 Advanced RTU Communication Module (BMENOR2200H)
V2.01

X
X X X

Vulnerability Details
CVE ID: CVE-2022-34759
CVSS v3.1 Base Score 7.5 | High | AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
A CWE-787: Out-of-bounds Write vulnerability exists that could cause a denial of service of thewebserver due to improper parsing of the HTTP Headers.
12-Jul-22 (19-Aug-22)

Document Reference Number – SEVD-2022-193-01 V3.0

Page 1 of 6X

Schneider Electric Security Notification
CVE ID: CVE-2022-34760
CVSS v3.1 Base Score 7.5 | High | AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
A CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability exists that could
cause a denial of service of the webserver due to improper handling of the cookies.
CVE ID: CVE-2022-34761
CVSS v3.1 Base Score 7.5 | High | AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
A CWE-476: NULL Pointer Dereference vulnerability exists that could cause a denial of serviceof the webserver when parsing JSON content type.
CVE ID: CVE-2022-34762
CVSS v3.1 Base Score 5.9 | Medium | AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
A CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')vulnerability exists that could cause unauthorized firmware image loading when unsigned
images are added to the firmware image path.
CVE ID: CVE-2022-34763
CVSS v3.1 Base Score 5.9 | Medium | AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
A CWE-345: Insufficient Verification of Data Authenticity vulnerability exists that could
cause loading of unauthorized firmware images due to improper verification of the firmware
signature.
CVE ID: CVE-2022-34764
CVSS v3.1 Base Score 5.9 | Medium | AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
A CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
vulnerability exists that could cause denial of service when parsing the URL.
CVE ID: CVE-2022-34765
CVSS v3.1 Base Score 5.5 | Medium | AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H
A CWE-73: External Control of File Name or Path vulnerability exists that could cause loadingof unauthorized firmware images when user-controlled data is written to the file path.

12-Jul-22 (19-Aug-22)

Document Reference Number – SEVD-2022-193-01 V3.0

Page 2 of 6

Schneider Electric Security Notification
Remediations
Affected Product& Version

Remediation
BMENUA0100 V2.01 includes a fix for these vulnerabilities and isavailable for download here:
https://www.se.com/ww/en/download/document/BMENUA0100_FIRMWA
RE_SV_02.01/

OPC UA
ModiconCommunication
Module(BMENUA0100)
V1.10 and prior

If customers choose not to apply the remediation provided above, theyshould immediately apply the following mitigations to reduce the risk ofexploit:• Setup network segmentation and implement a firewall to block all
unauthorized access to port 502/TCP• Configure BMENUA0100 module to operate in Secured mode.
Refer to the user manual below in the section ‘Cybersecurity
Operating Modes’ and change the default passwords• Configure role-based access control and local authentication forusers of BMENUA0100 module. Refer to the ‘Access Control’
section in the user manual• User Manual: https://download.schneiderelectric.com/files?p_enDocType=User+guide&p_File_Name=PHA
83350.03.pdf&p_Doc_Ref=PHA83350• Use IPSEC to help secure Ethernet communication• Download the firmware updates from the Schneider Electricwebsite and verify the firmware integrity
To ensure you are informed of all updates, including details on affected
products and remediation plans, subscribe to Schneider Electric’s
security notification service here:
https://www.se.com/en/work/support/cybersecurity/securitynotifications.jsp

12-Jul-22 (19-Aug-22)

Document Reference Number – SEVD-2022-193-01 V3.0

Page 3 of 6

Schneider Electric Security Notification
BMENOR2200H V3.02.02 includes a fix for these vulnerabilities and isavailable for download here:
https://www.se.com/ww/en/product/BMENOR2200H/x80-advanced-rtumodule-ethernet-based-1-serial-port-hardened/
If customers choose not to apply the remediation provided above, theyshould immediately apply the following mitigations to reduce the risk ofexploit:••

X80 Advanced
RTU
Communication
Module(BMENOR2200)
V2.01 and prior••••Setup network segmentation and implement a firewall to block all
unauthorized access to port 502/TCP
Configure BMENOR2200H module to operate in Secured mode.
Refer to the user manual below in the section ‘Cyber Security
Configuration’ and change the default passwords
Configure role-based access control and local authentication forusers of BMENOR2200H module. Refer to the ‘RBAC’ section inthe user manual
User Manual: https://download.schneiderelectric.com/files?p_Doc_Ref=PHA90072&p_enDocType=User+g
uide&p_File_Name=PHA90072.02.pdf
Use IPSEC to help secure Ethernet communication
Download the firmware updates from the Schneider Electricwebsite and verify the firmware integrity

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

12-Jul-22 (19-Aug-22)

Document Reference Number – SEVD-2022-193-01 V3.0

Page 4 of 6

Schneider Electric Security Notification••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 researchers for identifying and helping to coordinate
a response to these vulnerabilities:
CVE

Researchers

CVE-2022-34759, CVE-2022-34760,
CVE-2022-34761, CVE-2022-34762,
CVE-2022-34763, CVE-2022-34764,
CVE-2022-34765

Ryan Hall and Vlad Ionescu, Meta Red Team X

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 SPECIAL

12-Jul-22 (19-Aug-22)

Document Reference Number – SEVD-2022-193-01 V3.0

Page 5 of 6

Schneider Electric Security Notification
DAMAGES, 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

Revision Control:
Version 1.0
12 July 2022

Original Release

Version 2.0
09 August 2022

A fix is available for the OPC UA Modicon
Communication Module (BMENUA0100).

Version 3.0
19 August 2022

A fix is available for X80 Advanced RTUCommunication Module (BMENOR2200).

signed by Product Security Office
Product Security Office Digitally
Date: 2022.08.18 14:27:06 -04'00'

12-Jul-22 (19-Aug-22)

Document Reference Number – SEVD-2022-193-01 V3.0

Page 6 of 6