CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
58.3%
Successful exploitation of these vulnerabilities could allow an attacker to perform malicious command injection, trick a valid user into downloading malicious software onto their computer. Successful exploitation may also allow an attacker to pose as a legitimate user.
The following versions of MSM, a monitoring system for high voltage switchgear, are affected:
The affected product is vulnerable to cross site request forgery (CSRF), which if exploited could lead an attacker to gain unauthorized access to the web application and perform an unauthorized action without the knowledge of the legitimate user.
CVE-2021-40335 has been assigned to this vulnerability. A CVSS v3 base score of 5.0 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L).
The affected product is vulnerable to HTTP response splitting, which if exploited, could lead an attacker to inject harmful code into the userβs web browser for purposes such as stealing session cookies.
CVE-2021-40336 has been assigned to this vulnerability. A CVSS v3 base score of 5.0 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L).
Hitachi Energy reported these vulnerabilities to CISA.
Hitachi Energy recommends security practices and firewall configurations to help protect a network from attacks originating outside the network:
MSM should only be used to access the internet for authorized information. Portable computers and removable storage media should be carefully scanned for viruses before connecting to a network.
Links used for access to an MSM system should not be sent by email; links to MSM should not be opened. Suspicious emails should be reported to the IT administrator.
For more information, see Hitachi Energy advisory 8DBD000T085.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability 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-12-146-01BβTargeted 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.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
No known public exploits specifically target these vulnerabilities. These vulnerabilities have a high attack complexity.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-40335
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-40336
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cwe.mitre.org/data/definitions/113.html
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