Schneider Electric Security Notification
C-Bus Toolkit and C-Gate Server
13 April 2021 (08 November 2022)

Overview
Schneider Electric is aware of multiple vulnerabilities in its C-Bus Toolkit and C-Gate server
products.
The C-Bus Toolkit product, which includes C-Gate Server, is an application you run on yourpersonal computer to configure and commission C-Bus Installations.
Failure to apply the remediations provided below may risk remote code execution attack, which
could result in an attacker having remote access to the computer.
November 2022 Update: The CWE for CVE-2021-22716 has been updated (marked in red). No
additional action is required for customers who have already followed the remediation
instructions provided below.

Affected Product and Versions

C-Gate Server 2.11.7 and prior2021-22718

2021-22719

2021-22720

2021-22748

X

X

X

X

X

X

X

2021-22796

2021-22717

C-Bus Toolkit V1.15.9 and prior2021-22716

CVE-X

Vulnerability Details
CVE ID: CVE-2021-22717
CVSS v3.0 Base Score 8.8 | High | CVSS:3.0/ AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
A CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('PathTraversal') vulnerability exists that could allow a remote code execution when processing config
files.
CVE ID: CVE-2021-22719
CVSS v3.0 Base Score 8.8 | High | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
A CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('PathTraversal') vulnerability exists that could allow a remote code execution when a file is uploaded.

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CVE ID: CVE-2021-22748
CVSS v3.1 Base Score 8.8 | High | CVSS:3.1/ AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
A CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('PathTraversal') vulnerability exists that could allow a remote code execution when a file is saved.
CVE ID: CVE-2021-22796
CVSS v3.1 Base Score 8.8 | High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
A CWE-287: Improper Authentication vulnerability exists that could allow remote code execution
when a malicious file is uploaded.
CVE ID: CVE-2021-22716
CVSS v3.0 Base Score 7.8 | High | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
A CWE-732: Incorrect Permission Assignment for Critical Resource vulnerability exists that
could allow remote code execution when an unprivileged user modifies a file.
CVE ID: CVE-2021-22718
CVSS v3.0 Base Score 7.8 | High | CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
A CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('PathTraversal') vulnerability exists that could allow a remote code execution when restoring project
files.
CVE ID: CVE-2021-22720
CVSS v3.0 Base Score 6.5 | Medium | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
A CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path
Traversal') vulnerability exists that could allow a remote code execution when restoring aproject.

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Remediation
Affected Product &VersionsRemediation
Version 1.15.10 of the C-Bus Toolkit product, which contains the CGate Server, includes a fix for these vulnerabilities and is available
for download here:

C-Bus Toolkit
V1.15.9 and priorhttps://www.se.com/ww/en/product-range/2216-spacelogic-c-bushome-automation-system/?parent-subcategoryid=88010&filter=business-5-residential-and-small-business---software-firmware-tab#software-and-firmware
A reboot will be needed after the update.
Version 2.11.8 of the C-Gate Server product, includes a fix for thesevulnerabilities and is available for download here:

C-Gate ServerV2.11.7 and priorhttps://www.se.com/ww/en/product-range/2216-spacelogic-c-bushome-automation-system/?parent-subcategoryid=88010&filter=business-5-residential-and-small-business---software-firmware-tab#software-and-firmware
A reboot will be needed after the update.

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.
If customers choose not to apply the remediation provided above, they should immediately
apply the following mitigations to reduce the risk of exploit:••••

Use an allow list for this this application
Turn on the computer’s firewall
Use an antivirus program
Secure this computer to prevent unauthorized personnel from accessing this computer

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.

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Schneider Electric Security Notification
••
•
•
•
•

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 Best
Practices document.

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

Researchers

CVE-2021-22716

Simon Zuckerbraun of Trend Micro Zero Day Initiative

CVE-2021-22717,
CVE-2021-22718,
CVE-2021-22719

rgod working with Trend Micro Zero Day Initiative

CVE-2021-22720

rgod working with Trend Micro Zero Day Initiative & Tenable Security

CVE-2021-22796

Tenable Security

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

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Schneider Electric Security Notification
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 SPECIAL
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 DISCRETIONAbout 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 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.

www.se.com

Revision Control:
Version 1.0
13 April 2021

Original Release

Version 2.0
08 June 2021

Added CVE-2021-22748

Version 3.0
14 September 2021

• C-Gate Server added as an affected product of CVE-202122720• CVE-2021-22796 added• Updated the previously provided remediation• Added Tenable Security to the acknowledgement section

Version 4.0
08 November 2022

The CWE for CVE-2021-22716 has been updated (marked inred). No additional action is required for customers who havealready followed the remediation instructions provided below.

signed by Product Security Office
Product Security Office Digitally
Date: 2022.11.09 16:47:35 -05'00'
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