CVSS v3 9.8
ATTENTION: Exploitable remotely/low skill level to exploit.
This updated advisory is a follow-up to the original advisory titled ICSA-18-025-01 Nari PCS-9611 that was published January 25, 2018, on the NCCIC/ICS-CERT website.
Successful exploitation of this vulnerability could allow a remote attacker arbitrary read/write abilities on the system.
All versions of the PCS-9611 relay, a control and monitoring unit, are affected.
An improper input validation vulnerability has been identified that affects a service within the software that may allow a remote attacker to arbitrarily read/access system resources and affect the availability of the system.
Kirill Nesterov and Alexey Osipov from Kaspersky Labs reported the vulnerability to NCCIC.
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Nari has released Version 3.14 of the software to resolve the reported vulnerability. To obtain the newest version of the software, contact Nari by locating a local service contact via <http://www.nrec.com/en/contact-us.html> or contacting the company’s headquarters directly at:
Tel: +86 25 8717 8888
Fax: +86 25 8717 8999
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NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
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.
NCCIC also recommends that users take the following measures to protect themselves from social engineering attacks:
No known public exploits specifically target this vulnerability.