ICS Advisory (ICSA-21-096-01)

Hitachi ABB Power Grids Multiple Products (Update A)

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1. EXECUTIVE SUMMARY

  • CVSS v3 7.5
  • ATTENTION: Exploitable remotely/Low attack complexity
  • Vendor: Hitachi ABB Power Grids
  • Equipment: Relion 670, 650, and SAM600-IO; REB500; RTU500; FOX615 (TEGO1); MSM; GMS600; PWC600
  • Vulnerability: Improper Input Validation

2. UPDATE INFORMATION

This updated advisory is a follow-up to the original advisory titled ICSA-21-096-01 Hitachi ABB Power Grids Multiple Products that was published April 6, 2021, on the ICS webpage on us-cert.cisa.gov.

3. RISK EVALUATION

Successful exploitation of this vulnerability could reboot the device regularly, resulting in a denial-of-service condition. During the reboot phase, the primary functionality of the device is not available.

4. TECHNICAL DETAILS

4.1 AFFECTED PRODUCTS

  • Relion 670 series Version 1.1, all revisions
  • Relion 670 series Version 1.2.3, all revisions
  • Relion 670 series Version 2.0, all revisions
  • Relion 670/650 series Version 2.1, all revisions
  • Relion 670/650 series Version 2.2.0, all revisions
  • Relion 670/650/SAM600-IO series Version 2.2.1, all revisions
  • Relion 670 series Version 2.2.2, all revisions
  • Relion 670 series Version 2.2.3, all revisions
  • Relion 650 series Version 1.1, all revisions
  • Relion 650 series Version 1.2, all revisions
  • Relion 650 series Version 1.3, all revisions
  • RTU500 CMU firmware release 7.x
  • RTU500 CMU firmware release 8.x
  • RTU500 CMU firmware release 9.x
  • RTU500 CMU firmware release 10.x
  • RTU500 CMU firmware release 11.x
  • RTU500 CMU firmware release 12.x
  • REB500 7.3
  • REB500 7.4
  • REB500 7.5
  • REB500 7.6
  • REB500 8.2
  • REB500 8.3
  • TEGO1 service unit of FOX615 with ESW Version R1D02 and prior
  • MSM: All versions before 2.1.0
  • GMS600 Versions 1.3.0 and prior
  • PWC600 Version 1.0
  • PWC600 Version 1.1

4.2 VULNERABILITY OVERVIEW

4.2.1    IMPROPER INPUT VALIDATION CWE-20

An attacker with access to the IEC 61850 network with knowledge of how to reproduce the attack, as well as the IP addresses of the different IEC 61850 access points (of IEDs/products), can force the device to reboot, which renders the device inoperable for approximately 60 seconds.  This vulnerability affects only products with IEC 61850 interfaces.

CVE-2021-27196 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

4.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Energy
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: Switzerland

4.4 RESEARCHER

Markus Mahrla, GAI NetConsult GmbH and Lars Lengersdorf, Amprion GmbH reported this vulnerability to Hitachi ABB Power Grids.

5. MITIGATIONS

Hitachi ABB Power Grids recommends users apply relevant updates at their earliest convenience. Please contact Hitachi ABB Power Grids to acquire firmware on a specific product version. Hitachi ABB Power Grids has created these new versions to address vulnerability:

  • PWC600 Version 1.0.1.4
  • PWC600 Version 1.1.0.1
  • GMS600 Version 1.3.1
  • MSM Version 2.1.0+ (All older versions might be affected)
  • FOX615 TEGO1 Version R2A16 and later
  • REB500 7.6 Version 7.60.19
  • REB500 8.2 Version 8.2.0.5
  • REB500 8.3 Version 8.3.1.0
  • For REB500 7.3, 7.4, and 7.5, it is recommended to migrate to the REB500 7.6 Version 7.60.19 or later.
  • RTU500 CMU firmware release 12.6.1.0
  • RTU500 CMU firmware release 12.4.10.0 (planned)
  • RTU500 CMU firmware release 12.2.11.0 (planned)
  • RTU500 CMU firmware release 12.0.14.0 (planned)
  • For RTU500 series version of release 11 and older, migration to latest release 12 is recommended.
  • Relion 670 series Version 1.1: Please follow recommendation as listed in the mitigation factor section or upgrade to the latest product version. For upgrades, please contact Hitachi ABB Power Grids.
  • Relion 670 series Version 1.2.3: Fixed in revision 670 1.2.3.20

--------- Begin Update A Part 1 of 1 ---------

  • Relion 670 series version 2.0: Fixed in revision 670 2.0.0.13

--------- End Update A Part 1 of 1 ---------

  • Relion 670 series Version 2.0: Planned
  • Relion 670 series Version 2.1: Planned
  • Relion 670/650 series Version 2.2.0: Fixed in revision 670 2.2.0.13
  • Relion 670/650/SAM600-IO series Version 2.2.1: Fixed in revision 670 2.2.1.6
  • Relion 670 series Version 2.2.2: Fixed in revision 670 2.2.2.3
  • Relion 670 series Version 2.2.3: Fixed in revision 670 2.2.3.2
  • Relion 650 series Version 1.1: Planned
  • Relion 650 series Version 1.2: Please follow recommendation as listed in the mitigation factor section or upgrade to product Version 1.3. For upgrades, please contact Hitachi ABB Power Grids.
  • Relion 650 series Version 1.3: Fixed in revision 650 1.3.0.7

Not connecting the affected products to any station network through the LAN port (optical or RJ45) should make above attack physically impossible. The functionality of the system would have to be maintained by giving switching commands through hardwired binary inputs. This vulnerability affects only products with IEC 61850 interfaces.

Please see the Hitachi ABB Power Grids advisory for this issue in each of the products:

Recommended security practices and firewall configurations can help protect a process control network from attacks originating from outside the network. Such practices include process control systems that are physically protected from direct access by unauthorized personnel, have no direct connections to the Internet, and are separated from other networks by means of a firewall system with a minimal number of ports exposed. Other systems would be evaluated case by case. Process control systems should not be used for Internet surfing, instant messaging, or receiving emails. Portable computers and removable storage media should be carefully scanned for viruses before they are connected to a control system.

More information on recommended practices can be found in the cybersecurity deployment guidelines for each product version. 

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. 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. 


Contact Information

For any questions related to this report, please contact the CISA at:

Email: CISAservicedesk@cisa.dhs.gov
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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