Successful exploitation of this vulnerability could allow an attacker to execute unauthorized Modbus functions on the controller when hijacking an authenticated Modbus session.
The following components of Schneider Electric EcoStruxure and Modicon are affected:
3.2.1 AUTHENTICATION BYPASS BY CAPTURE-REPLAY CWE-294
An authentication bypass by capture-replay vulnerability exists that could execute unauthorized Modbus functions on the controller when hijacking an authenticated Modbus session.
CVE-2022-45789 has been assigned to this vulnerability. A CVSS v3 base score of 8.1 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).
Jos Wetzels and Daniel dos Santos, Forescout Technologies, reported these vulnerabilities to Schneider Electric.
Schneider Electric has released the following remediations and mitigations for users to implement:
For more information, see Schneider Electricβs security advisory SEVD-2023-010-06.
Schneider Electric strongly recommends the following industry cybersecurity best practices:
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. 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-12-146-01BβTargeted 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.
No known public exploitation specifically targeting these vulnerabilities have been reported to CISA at this time. This vulnerability has a high attack complexity.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-45789
cisa.gov/ics
cisa.gov/ics
cwe.mitre.org/data/definitions/294.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Schneider%20Electric%20EcoStruxure%20Control%20Expert%2C%20Process%20Expert%2C%20Modicon%20M340%2C%20M580%20and%20M580%20CPU+https://www.cisa.gov/news-events/ics-advisories/icsa-23-227-01
us-cert.cisa.gov/ics/Recommended-Practices
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.facebook.com/CISA
www.facebook.com/sharer/sharer.php?u=https://www.cisa.gov/news-events/ics-advisories/icsa-23-227-01&title=Schneider%20Electric%20EcoStruxure%20Control%20Expert%2C%20Process%20Expert%2C%20Modicon%20M340%2C%20M580%20and%20M580%20CPU
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
www.instagram.com/cisagov
www.linkedin.com/company/cybersecurity-and-infrastructure-security-agency
www.linkedin.com/sharing/share-offsite/?url=https://www.cisa.gov/news-events/ics-advisories/icsa-23-227-01
www.oig.dhs.gov/
www.se.com/us/en/download/document/7EN52-0390/
www.se.com/ww/en/download/document/31007131K01000/
www.se.com/ww/en/download/document/EIO0000001578/
www.se.com/ww/en/download/document/EIO0000001999/
www.se.com/ww/en/download/document/EIO0000001999/
www.se.com/ww/en/download/document/EIO0000001999/
www.se.com/ww/en/download/document/PHA83350
www.se.com/ww/en/download/document/SEVD-2023-010-06/
www.se.com/ww/en/product-range/65406-%20ecostruxure-process-expert/#software-and-firmware
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-23-227-01
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=Schneider%20Electric%20EcoStruxure%20Control%20Expert%2C%20Process%20Expert%2C%20Modicon%20M340%2C%20M580%20and%20M580%20CPU&body=www.cisa.gov/news-events/ics-advisories/icsa-23-227-01