CVSS v3 7.5
ATTENTION: Exploitable remotely/low skill level to exploit
Successful exploitation of this vulnerability could result in resource exhaustion, denial of service, and/or memory corruption.
The following versions of PowerFlex 525, an AC drive, are affected:
A remote, unauthenticated threat actor can repeatedly send specific CIP packets to an affected PowerFlex 525 drive, which may allow disruption of the availability of the device.
Nicolas Merle of Applied Risk reported this vulnerability to Rockwell Automation.
Rockwell Automation has released new firmware to address the vulnerability. Download the latest version of the firmware from:
Rockwell Automation recommends the following general security guidelines:
Rockwell Automation has released a security advisory regarding this vulnerability, which can be found on its website at the following location (login required):
NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. Several recommended 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-CERT website in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents.
No known public exploits specifically target this vulnerability.
For any questions related to this report, please contact the CISA at:
Toll Free: 1-888-282-0870
For industrial control systems cybersecurity information: https://us-cert.cisa.gov/ics
or incident reporting: https://us-cert.cisa.gov/report
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