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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2022.5796 ICS Advisory (ICSA-22-314-07) Omron NJ/NX-series Machine Automation Controllers 11 November 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Omron NJ/NX-series Machine Automation Controllers Publisher: ICS-CERT Operating System: Network Appliance Resolution: Patch/Upgrade CVE Names: CVE-2022-33971 Original Bulletin: https://us-cert.cisa.gov/ics/advisories/icsa-22-314-07 Comment: CVSS (Max): 8.3 CVE-2022-33971 (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/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:C/C:H/I:H/A:H - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-22-314-07) Omron NJ/NX-series Machine Automation Controllers Original release date: November 10, 2022 Legal Notice All information products included in https://us-cert.cisa.gov/ics are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 8.3 o ATTENTION: Exploitable remotely, public exploits are available o Vendor: Omron o Equipment: NJ/NX-series Machine Automation Controllers o Vulnerability: Active Debug Code 2. RISK EVALUATION Successful exploitation of this vulnerability could allow an attacker to obtain unauthorized access to the device and cause the device to be in an "out of service" state or execute a malicious program on the device. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following products of the NJ/NX-series Machine Automation Controllers are affected: o NX7-series Machine Automation Controller (All Models): Versions 1.28 and prior o NX1-series Machine Automation Controller (All Models): Versions 1.48 and prior o NJ-series Machine Automation Controller (All Models): Versions 1.48 and prior 3.2 VULNERABILITY OVERVIEW 3.2.1 ACTIVE DEBUG CODE CWE-489 An attacker who can analyze the communication of the affected product and perform capture-replay can find unintended entry points into the affected product and cause a denial-of-service condition or execute a malicious program. CVE-2022-33971 has been assigned to this vulnerability. A CVSS v3 base score of 8.3 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:R/S:C/ C:H/I:H/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Japan 3.4 RESEARCHER Reid Wightman of Dragos reported this vulnerability to CISA. 4. MITIGATIONS Omron recommends updating versions of NJ/NX-series machine automation controllers to address this vulnerability. These updates are available to users by contacting their Omron or distributors : o NX7-series Machine Automation Controller (All Models): Versions 1.29 or higher o NX1-series Machine Automation Controller (All Models): Versions 1.50 or higher o NJ-series Machine Automation Controller (NJ501-1300, NJ501-1400, NJ501-1500): Versions 1.49 or higher o NJ-series Machine Automation Controller (All other Models): Versions 1.50 or higher Omron recommends users take the following mitigation measures to minimize the risk of exploitation of this vulnerability: Enable antivirus protection: o Protect any PC with access to the control system against malware by ensuring the installation and maintenance of up-to-date commercial grade antivirus software protection. Implement security measures to prevent unauthorized access: o Minimize connection of control systems and equipment to open networks preventing untrusted devices from accessing them. o Implement firewalls by shutting down unused communications ports, limiting communications between hosts, and isolate affected systems from the IT network. o Use a virtual private network (VPN) for remote access to control systems and equipment. o Use strong passwords and change passwords frequently. o Install physical controls that only permit authorized personnel access to control systems and equipment. o Scan USB drives or similar devices for viruses and malware to ensure the devices are safe before connecting them to systems and devices. o When possible, enforce multifactor authentication (MFA) on all devices with remote access to control systems and equipment. Protect data input and output: o Perform process validation, such as backup validation or range checks, to cope with unintentional modification of input/output data to control systems and devices. Use data recovery: o Conduct periodical data backups and maintenance to prepare for potential data loss. For more information see Omron's advisory: OMSR-2022-002 This vulnerability and countermeasures correspond to the those reported in the CISA ICS Alert: APT Cyber Tools Targeting ICS/SCADA 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. This vulnerability has a high attack complexity. For any questions related to this report, please contact the CISA at: Email: CISAservicedesk@cisa.dhs.gov Toll Free: 1-888-282-0870 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: https://auscert.org.au/gpg-key/ iQIVAwUBY23C5skNZI30y1K9AQgRHRAAgUfpwV6Q1VtohhSLc4iR876akrmscz35 clxeCbA6p7DGOImQnphYXu/XZLAMoTy4K4VuUUm6uAuyMHfRZHHWGtkkRHXstKhm sKoptkyHS2Bhr82qOxnZg2Hmw32XGSYI/w6O4hrNvTJcek4+RNHMa0zWAOPh1vf7 Mwc/FrT0x5mdajRZUTnvbU+Ucz9NM078T5VLftEfaJ3IPZ/rQHY6ufdPl2lz/6rc cMFzWqzEokuFxqZPPbsFAOLuCjnOrWVq2c09RZkszRuEKMQ6EIWKITaaCUJmPuUh xH/vqGnzqwo5WwGow2xL+zQN9mvSY7aD6uVwBkiBNzn+JywCJ1I7R0gmmwZTwqJh KXGduWgcrDXprwOvA29XLd4shq+savZTvc/iuQFK4gAcwip/m5U7giXZTuU54Zks u+LISHdx41iVn0nAGzMQeocHgQ6GLW1OPPe/f4ET5hLXeVjZTxhDUlmaYvrRyl6m 1tuPe1882s1vDbPXsNc3c9JZ73McnGbcCP0v1xCvz1+pSub9AcmchlXsfeR4e0Yo N8R1RAdnaNP73ItNfT0sCMkelnd0w3vBmN3jfL+GgGK4+MxtSPvbRaKDrzZF7lwe hpWdiXItZU+BQd2HUh4XpgbOnFhJb0UEAyDnpIBxDlq/dj2UD6VBHel9W73oMX0Q RRYWxyfVb8U= =kmP6 -----END PGP SIGNATURE-----