7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.062 Low
EPSS
Percentile
93.5%
Successful exploitation of these vulnerabilities could result in a denial-of-service condition on both the logging function of the device and its associated server.
The following versions of PCU400, a network manager and process communication unit, are affected:
3.2.1 RELIANCE ON UNCONTROLLED COMPONENT CWE-1357
The affected versions of PCU400 rely on a version of OpenSSL that contains a buffer overflow vulnerability. A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed the malicious certificate or for the application to continue certificate verification despite failure to construct a path to a trusted issuer. In PCU400, this vulnerability could be exploited if a malicious TLS certificate is used to secure communication between PCU400 and PCULogger. Successful exploitation may cause a denial-of-service of the PCU400 Logger and PCUCAG server.
Note: the issue is related to logging with the PCULogger tool. Otherwise, the PCU system is not impacted.
CVE-2022-3602 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).
3.2.2 RELIANCE ON UNCONTROLLED COMPONENT CWE-1357
The affected versions of PCU400 rely on a version of OpenSSL that contains a buffer overflow vulnerability. A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed a malicious certificate or for an application to continue certificate verification despite failure to construct a path to a trusted issuer. In PCU400, this vulnerability could be exploited if a malicious TLS certificate is used to secure communication between PCU400 and PCULogger. Successful exploitation may cause a denial-of-service of the PCU400 Logger and PCUCAG server.
Note: the issue is related to logging with the PCULogger tool. Otherwise, the PCU system is not impacted.
CVE-2022-3786 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).
Hitachi Energy reported these vulnerabilities to CISA.
Hitachi Energy has fixed the vulnerabilities in the following versions, and recommends users update their systems to the appropriate version:
Users should contact a Hitachi Energy representative for instructions on acquiring and installing the new versions.
Hitachi Energy encourages users to apply recommended security practices and firewall configurations. These practices include, but are not limited to:
For more information, see Hitachi Energy advisory 8DBD000137.
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. 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 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.
No known public exploits specifically target these vulnerabilities.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-3602
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-3786
cisa.gov/ics
cisa.gov/ics
cwe.mitre.org/data/definitions/1357.html
cwe.mitre.org/data/definitions/1357.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
search.abb.com/library/Download.aspx?DocumentID=8DBD000137&LanguageCode=en&DocumentPartId=&Action=Launch
twitter.com/CISAgov
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us-cert.cisa.gov/ics/Recommended-Practices
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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mailto:?subject=Hitachi%20Energy%20PCU400&body=www.cisa.gov/news-events/ics-advisories/icsa-23-019-01
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.062 Low
EPSS
Percentile
93.5%