CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
59.3%
This updated advisory is a follow-up to the original advisory titled ICSA-21-343-01 Hitachi Energy GMS600, PWC600, and Relion that was published December 9, 2021, on the ICS webpage at cisa.gov/ics.
Successful exploitation of this vulnerability could allow an attacker with user credentials to bypass security controls enforced by the product, which may lead to unauthorized modifications on data/firmware, and/or permanent disabling of the product.
The following versions of Hitachi Energy GMS600 and PWC600 circuit breaker monitoring systems are affected:
An attacker could exploit this vulnerability by first gaining access to credentials of any account or have access to a session ticket issued for an account. After gaining access via the configuration tool that accesses the proprietary Open Data-base Connectivity (ODBC) protocol (TCP 2102), the database table can be manipulated for privilege escalation, which then allows unauthorized modification or permanent disabling of the device.
CVE-2021-35534 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
A Department of Energy CyTRICS researcher from Idaho National Laboratory reported this vulnerability to Hitachi Energy.
Hitachi Energy recommends upgrading to the latest version of their software when it becomes available:
--------- Begin Update A Part 1 of 1 ---------
--------- End Update A Part 1 of 1 ---------
For other affected versions, please follow mitigation factors in Hitachi Energyβs advisories.
Hitachi Energy recommends the following security practices and firewall configurations to help protect process control networks from attacks that originate from outside the network:
Physically protect process control systems from direct access by unauthorized personnel.
For additional information and support please contact your product provider or Hitachi Energy service organization. For contact information, visit Hitachi Energy contact-centers.
Please see the Hitachi Energy PWC600, GMS600, and Relion advisories for additional mitigation and update information.
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 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 cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01BβTargeted 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.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-35534
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cwe.mitre.org/data/definitions/284.html
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CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
59.3%