Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.4102 Advisory (icsa-21-336-05) Hitachi Energy Relion 670/650/SAM600-IO 3 December 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Hitachi Energy Relion 670/650/SAM600-IO Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-35535 Original Bulletin: https://us-cert.cisa.gov/ics/advisories/icsa-21-336-05 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-21-336-05) Hitachi Energy Relion 670/650/SAM600-IO Original release date: December 02, 2021 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 8.1 o Vendor: Hitachi Energy o Equipment: Relion 670/650/SAM600-IO o Vulnerability: Insecure Default Initialization of Resource 2. RISK EVALUATION Successful exploitation of this vulnerability could hijack existing TCP sessions to inject packets of their choosing or cause denial-of-service conditions. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS Hitachi Energy reports this vulnerability affects the following Relion products: o Relion 670/650 series: All revisions of Version 2.2.0 o Relion 670/650/SAM600-IO series: All revisions of Version 2.2.1 o Relion 670 series: All revisions of Version 2.2.2 o Relion 670 series: All revisions of Version 2.2.3 until 2.2.3.3 o Relion 670/650 series: All revisions of Version 2.2.4 3.2 VULNERABILITY OVERVIEW 3.2.1 INSECURE DEFAULT INITIALIZATION OF RESOURCE CWE-1188 A vulnerability exists in the early boot process of the product in which there is a tiny time gap where a previous version of VxWorks is loaded prior to booting up the complete application firmware. The older version of VxWorks is susceptible to Urgent/11, which may allow for remote code execution on the device before the operating system is loaded. CVE-2021-35535 has been assigned to this vulnerability. A CVSS v3 base score of 8.1 has been calculated; the CVSS vector string is ( AV:L/AC:H/PR:N/UI:N/S:C/ C:H/I:H/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Energy o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Switzerland 3.4 RESEARCHER A Department of Energy CyTRICS researcher from Idaho National Laboratory reported this vulnerability to Hitachi Energy. 4. MITIGATIONS Hitachi Energy recommends the following actions to mitigate this vulnerability: o Relion 670/650 series Version 2.2.0: Upgrade to Version 2.2.5 o Relion 670/650/SAM600-IO series Version 2.2.1: Upgrade to Version 2.2.5 o Relion 670 series Version 2.2.2: Upgrade to Version 2.2.5 o Relion 670 series Version 2.2.3: Update to Revision 2.2.3.4 or upgrade to Version 2.2.5 o Relion 670/650 series Version 2.2.4: Upgrade to Version 2.2.5 Hitachi Energy recommends the following security practices and firewall configurations to help protect process control networks from attacks that originate from outside the network: o Physically protect process control systems from direct access by unauthorized personnel. o Do not directly connect to the Internet. o Separate from other networks by means of a firewall system that has a minimal number of ports exposed. o Process control systems should not be used for Internet surfing, instant messaging, or receiving e-mails. o Portable computers and removable storage media should be carefully scanned for viruses before they are connected to a control system. Please see Hitachi Energy advisory 8DBD000061 for additional mitigation and update information. 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.cisa.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.cisa.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. This vulnerability is not exploitable remotely. 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 CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product. - --------------------------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: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBYal80ONLKJtyKPYoAQhUag//bHc4hFiVVy1Q+eXIyljRjwTvq3hD4Sqc NCYgDuhzJnUbVg1MPrdsDzbIP2PMl5vMEdRNc9N2+qd30xplYO/D2jzK9WQS4JRp bAShNBUp5JMZ+QfAEaIyyf3WJvKUGN2Y7QpIKnMWaBT9s+yUPWR7tSihZ5EY8ka4 1bwIn4iDNG0b5/+lwjGjyyHWmodB9qOefKdHvULA8MfwAMCyIhqK8p9xhWIXHagr GywuQLte4e954cy/QPU+7WEbQ5OCiRvSV5/THXV5zghMgBj05C2cG8cfuLbR9H6t NMoAwC9TZTD6vG14tt52WG0MYa4X2gN7E6oq5Zv0fIF+yBvOgZEDG1Z5iZ+RDj9Y v51dK6hpVcQM2tbP8UoN80g0S8RbfoVPfjhpthkR9nOVaN4bhQ00s68dpRRaNFiD KoeQ+MhJ4w6da/An+VmF/jsEWuEvHAwy9xQGRM0A95qPrAqY7PR/1klYOeEtPiAP 5nCIX4L1w63FPnM+UfFF3Oj8/4xt7Ov/8FOrvnW+Hmkm9jB4IqrlCC4n7ExAMFEW nQK/OuV8I7Y7EdJP2eeOykxCLjblCDTqF7m0Ryy4M7f3kBlFncAIizdolny8L/br I8MKKIUg69hxzzfOaLF7wp3KzBn5DV0oDUikEravsFzTOQCzEb6x+02/BjqLYhAS sJUH15vZgFE= =WNq6 -----END PGP SIGNATURE-----