Successful exploitation of this vulnerability could allow access to the device and disturb operations with connected devices.
CERT VDE reports the vulnerability affects the following traffic light controller:
An open port used for debugging grants root access to the device without access control via network.
Martin Aman (ProtectEM) reported this vulnerability in coordination with CERT@VDE
SWARCO TRAFFIC SYSTEMS released a patch to fix the vulnerability and close the port. Please contact SWARCO TRAFFIC SYSTEMS for further information.
CERT@VDE published VDE-2020-016 regarding this vulnerability.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
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 on us-cert.gov. 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 webpage on us-cert.gov 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 CISA 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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