Schneider Electric Security Notification
AT&T Labs Compressor (XMilI) and Decompressor (XDemill) used by
EcoStruxureTM Control Expert, EcoStruxureTM Process Expert andSCADAPack RemoteConnect™ for x70
10 August 2021 (12 July 2022)

Overview
Schneider Electric is aware of multiple vulnerabilities on AT&T Labs’ Compressor (XMilI) anddecompressor (XDemill) third party components used by EcoStruxure Control Expert,
EcoStruxure Process Expert and SCADAPack RemoteConnect™ for x70.
Failure to apply the mitigations provided below may lead to the execution of a malicious file,which could result in code execution with elevated privileges on the engineering workstation.
For an attack to be successful, an attacker requires access to the engineering workstation andthen needs to trick a valid user to run a script or load a malicious project file.
July 2022 Update: A release is available for SCADAPack RemoteConnect™ R2.7.3 that
addresses workstation vulnerabilities related to the issues listed below.

Affected Products and Versions
ProductVersion
All versions (including former Unity Pro) prior toV15.1 HF001
All versions (including former HDCS) prior toV2021

EcoStruxure™ Control Expert
EcoStruxure™ Process Expert
SCADAPack RemoteConnect™ for x70

All versions prior to R2.7.3

Vulnerability Details
The vulnerabilities reported on XDemill and XMilI are triggered through the execution of amalicious script on the engineering workstation, or when loading a specially crafted project file
into the engineering tool. The successful exploitation of these vulnerabilities may lead to code
execution with elevated privileges on the engineering workstation.
The following CVEs have been reserved by external organizations. Additional vulnerability
details can be found at the links below:••

CVE-2021-21810
CVE-2021-21811••

CVE-2021-21825
CVE-2021-21826•

CVE-2021-21812•

CVE-2021-21827•

CVE-2021-21813•

CVE-2021-21828•

CVE-2021-21814•

CVE-2021-21829••

CVE-2021-21815
CVE-2022-26507•

CVE-2021-21830

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Schneider Electric Security Notification
Remediation
Affected Product &Version

EcoStruxure™
Control Expert
All versions (includingformer Unity Pro) prior
to v15.1 HF001

Remediation
V15.1 HF001 of EcoStruxure™ Control Expert includes a fix forthese vulnerabilities and is available for download here:
https://www.se.com/ww/en/download/document/ControlExpert_V151_HF001/
If customers choose not to apply the remediation provided above,
they should immediately apply the following mitigations to reduce therisk of exploit:• Store the project files in a secure storage and restrict theaccess to only trusted users• When exchanging files over the network, use securecommunication channels• Only open project files received from a trusted source• Compute a hash of the project files and regularly check theconsistency of this hash to verify the integrity before usage• Harden the workstation running EcoStruxure Control Expert
or Unity Pro• Customers using Unity Pro should strongly consider
migrating to EcoStruxure Control Expert.
V2021 of EcoStruxure™ Process Expert includes a fix for thesevulnerabilities and is available for download here:
https://www.se.com/myschneider/documentsDownloadCenterDetail/in/en/EPE2021Release
It is recommended to first read the ReadMe first document before
proceeding with the software installation.

EcoStruxure™
Process Expert
All versions (includingformer HDCS) prior tov2021

10-Aug-21(12-Jul-22)

If customers choose not to apply the remediation provided above,
they should immediately apply the following mitigations to reduce therisk of exploit:• Store the project files in a secure storage and restrict theaccess to only trusted users• When exchanging files over the network, use securecommunication channels• Only open project files received from a trusted source• Compute a hash of the project files and regularly check theconsistency of this hash to verify the integrity before usage• Harden the workstation running EcoStruxure Process Expert

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Schneider Electric Security Notification
Version R2.7.3 of SCADAPack RemoteConnect™ includes a fix forthese vulnerabilities and is available for download here at theSchneider Electric Exchange:
https://shop.exchange.se.com/en-US/apps/58663

SCADAPack
RemoteConnect™
for x70
All versions prior toR2.7.3

Note: Users no longer need to update the RemoteConnect™
application when there is a Control Expert update.
If customers choose not to apply the remediation provided above,they should immediately apply the following mitigations to reduce therisk of exploit:• Store the project files in a secure storage and restrict theaccess to only trusted users• When exchanging files over the network, use securecommunication channels• Only open project files received from a trusted source• Compute a hash of the project files and regularly check theconsistency of this hash to verify the integrity before usage• Harden the workstation running SCADAPack
RemoteConnect™ for x70

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, 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 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.

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Schneider Electric Security Notification•••

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:
CVE

Researchers

CVE-2021-21810, CVE-2021-21825, CVE-2021-21811
CVE-2021-21826, CVE-2021-21812, CVE-2021-21827
CVE-2021-21813, CVE-2021-21828, CVE-2021-21814
CVE-2021-21829, CVE-2021-21815, CVE-2021-21830

Carl Hurd (Cisco Talos)

CVE-2022-26507

Uri Katz of Claroty Research

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 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,

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Schneider Electric Security Notification
INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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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
10 August 2021

Original Release

Version 2.0
08 March 2022

Remediation update

Version 2.1
09 March 2022

Recently released versions of EcoStruxure™ Control Expert andEcoStruxure™ Process Expert previously communicated to addressthese vulnerabilities were found to not fully address the issues as statedin a previous update of this notification. Customers are encouraged tofollow the mitigations provided below.

Version 3.0
12 April 2022Added remediation for EcoStruxure™ Control Expert V15.1 HF001 andEcoStruxure™ Process Expert V2021. Schneider Electric is establishinga remediation plan for future versions of SCADAPack RemoteConnect
for x70. Added CVE-2022-26507.

Version 4.0
12 July 2022

Added remediation for SCADAPack RemoteConnect™ for x70.

signed by Product Security Office
Product Security Office Digitally
Date: 2022.07.07 12:37:30 -04'00'

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