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AUSCERT External Security Bulletin Redistribution
ESB-2023.4136
ICS Advisory | ICSA-23-201-01 Schneider Electric EcoStruxure Products,
Modicon PLCs, and Programmable Automation Controllers
21 July 2023
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AusCERT Security Bulletin Summary
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Product: Schneider Electric EcoStruxure Products, Modicon PLCs, and Programmable Automation Controllers
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2022-45788
Original Bulletin:
https://www.cisa.gov/news-events/ics-advisories/icsa-23-201-01
Comment: CVSS (Max): 7.5 CVE-2022-45788 (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
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ICS Advisory (ICSA-23-201-01)
Schneider Electric EcoStruxure Products, Modicon PLCs, and Programmable
Automation Controllers
Release Date
July 20, 2023
1. EXECUTIVE SUMMARY
o CVSS v3 7.5
o ATTENTION: Exploitable remotely/low attack complexity
o Vendor: Schneider Electric
o Equipment: EcoStruxure Products, Modicon PLCs, and Programmable Automation
Controllers
o Vulnerabilities: Improper Check for Unusual or Exceptional Conditions
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker
unauthorized access to components, ability to execute arbitrary code, or
ability to execute a denial-of-service.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
o EcoStruxure Control Expert: All versions prior to V15.3
o EcoStruxure Process Expert: Version V2020 and prior
o Modicon M340 CPU (part numbers BMXP34*): All versions prior to SV3.51
o Modicon M580 CPU (part numbers BMEP* and BMEH*): All versions prior to
SV4.10
o Modicon M580 CPU Safety (part numbers BMEP58*S and BMEH58*S): All versions
o Modicon Momentum Unity M1E Processor (171CBU*): All versions prior to SV2.6
o Modicon MC80 (BMKC80): All versions
o Legacy Modicon Quantum (140CPU65*) and Premium CPUs (TSXP57*): All versions
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER CHECK FOR UNUSUAL OR EXCEPTIONAL CONDITIONS CWE-754
The affected components contain a vulnerability that could cause arbitrary code
execution, a denial-of-service condition, and/or loss of confidentiality and
integrity when an actor loads a malicious project file onto the controller.
CVE-2022-45788 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:R/S:U/
C:H/I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Critical
Manufacturing, Energy
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: France
3.4 RESEARCHER
Jos Wetzels and Daniel dos Santos of Forescout Technologies reported these
vulnerabilities to Schneider Electric.
4. MITIGATIONS
Schneider Electric released the following remediations for users to implement:
o EcoStruxure Process Expert: Version V2021 available for download and is not
impacted by this vulnerability, as the affected component has been removed
from this version.
o EcoStruxure Control Expert: Software V15.3 includes a fix for this
vulnerability and is available for download.
o Modicon M580 (part numbers BMEP* and BMEH*, excluding M580 CPU Safety):
Firmware SV4.10 includes a fix for this vulnerability and is available for
download.
o Modicon Momentum Unity M1E Processor (part numbers 171CBU*): Firmware VS2.6
includes a fix for this vulnerability and is available for download.
o Modicon M340 CPU (part numbers BMXP34*): Firmware SV3.51 includes a fix for
this vulnerability and is available for download.
o Modicon MC80 CPU (part numbers BMKC80*): Firmware SV1.90 includes a fix for
this vulnerability and is available for download.
Users should use appropriate patching methodologies when applying these patches
to their systems. Schneider Electric recommends using backups and evaluating
the impact of these patches in a "testing and development environment" or on an
offline infrastructure.
Users should contact Schneider Electric for assistance in removing a patch.
Users should apply the best practices for network hardening as documented in
the product user guide and the Schneider Electric Recommended Cybersecurity
Best Practices .
For more information, see Schneider Electric's security advisory
SEVD-2023-010-05 .
CISA recommends users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls and
isolate them from business networks.
o When remote access is required, use secure methods, such as virtual private
networks (VPNs), recognizing VPNs may have vulnerabilities and should be
updated to the most current version available. Also recognize VPN is only
as secure as its connected devices.
CISA reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices
on the ICS webpage at cisa.gov/ics . Several CISA products detailing cyber
defense best practices are available for reading and download, including
Improving Industrial Control Systems Cybersecurity with Defense-in-Depth
Strategies .
Additional mitigation guidance and recommended practices are publicly available
on the ICS webpage at cisa.gov/ics in the technical information paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies .
Organizations observing suspected malicious activity should follow established
internal procedures and report findings to CISA for tracking and correlation
against other incidents.
CISA also recommends users take the following measures to protect themselves
from social engineering attacks:
o Do not click web links or open attachments in unsolicited email messages.
o Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
o Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
No known public exploits specifically target these vulnerabilities.
This product is provided subject to this Notification and this Privacy & Use
policy.
Vendor
Schneider Electric
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