9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.002 Low
EPSS
Percentile
59.7%
Successful exploitation of these vulnerabilities could allow an unauthorized user to obtain sensitive information and gain access to the network elements managed by the UNEM and could cause availability issue on affected UNEM products.
Hitachi Energy reports these vulnerabilities affect the following UNEM products:
3.2.1 INADEQUATE ENCRYPTION STRENGTH CWE-326
Affected Hitachi Energy UNEM products use the DES cypher to encrypt user credentials used to access the network elements. DES is no longer considered secure because it uses a short 56-bit key, which could allow the cypher to be decrypted in a short time.
CVE-2021-40341 has been assigned to this vulnerability. A CVSS v3 base score of 7.1 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N).
3.2.2 INADEQUATE ENCRYPTION STRENGTH CWE-326
Affected Hitachi Energy UNEM products use a DES implementation with a default key for encryption. An attacker that exploits this vulnerability could obtain sensitive information and gain access to the network elements managed by the UNEM.
CVE-2021-40342 has been assigned to this vulnerability. A CVSS v3 base score of 7.1 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N).
3.2.3 USE OF HARD-CODED CRYPTOGRAPHIC KEY CWE-321
Affected Hitachi Energy UNEM products contain public and private keys used to sign and protect custom parameter set (CPS) files from modification. An attacker exploiting this vulnerability could change the CPS file and sign it, so that it is trusted as the legitimate CPS file.
CVE-2022-3927 has been assigned to this vulnerability. A CVSS v3 base score of 8.0 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H).
3.2.4 USE OF HARD-CODED CRYPTOGRAPHIC KEY CWE-321
In the message queue of affected Hitachi Energy UNEM products contains a hard-coded credential. An attacker that exploits this vulnerability could access data inside the internal message queue.
CVE-2022-3928 has been assigned to this vulnerability. A CVSS v3 base score of 7.1 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N).
3.2.5 CLEARTEXT TRANSMISSION OF SENSITIVE INFORMATION CWE-319
Communication between the client (UNEM User Interface) and the server application (UNEM Core) partially uses common object request broker architecture (CORBA) over TCP/IP. This protocol is not encrypted and could allow an unauthorized user to trace internal messages.
CVE-2022-3929 has been assigned to this vulnerability. A CVSS v3 base score of 8.3 has been calculated; the CVSS vector string is (AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H).
Hitachi Energy reported these vulnerabilities to CISA.
Hitachi Energy remediated these vulnerabilities in UNEM R16A and recommends users upgrade to this version.
For CVE-2021-40341, CVE-2021-40342, UNEM R16A has partial remediation. The full remediation will be complete in an upcoming UNEM release.
Hitachi Energy recommends the following mitigation actions (refer to the mitigation factors/workarounds in Hitachi Energyβs advisory for details):
Hitachi Energy recommends the following security practices and firewall configurations to help protect a process control network from attacks originating from outside the network:
For more information, see Hitachi Energy advisory 8DBD000084.
Additional hardening guidelines for protecting the host operating system are published by βThe Center for Internet Security (CIS).β
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. 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-12-146-01BβTargeted 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. These vulnerabilities are exploitable remotely. These vulnerabilities have a low attack complexity.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-40341
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-40342
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-3927
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-3928
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-3929
cisa.gov/ics
cisa.gov/ics
cwe.mitre.org/data/definitions/319.html
cwe.mitre.org/data/definitions/321.html
cwe.mitre.org/data/definitions/321.html
cwe.mitre.org/data/definitions/326.html
cwe.mitre.org/data/definitions/326.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
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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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