CVE-2021-40334

SSH activation problem in the proprietary management protocol (port TCP 5558)

Description

Missing Handler vulnerability in the proprietary management protocol (port TCP 5558) of Hitachi Energy FOX61x, XCM20 allows an attacker that exploits the vulnerability by activating SSH on port TCP 5558 to cause disruption to the NMS and NE communication. This issue affects: Hitachi Energy FOX61x versions prior to R15A. Hitachi Energy XCM20 versions prior to R15A.

Remediation

Solution:

  • Fixed in FOX61x R15A or XMC20 R15A

Workaround:

  • Recommended security practices and firewall configurations help protecting systems from attacks that originate from outside the network. Such practices include that network management systems and FOX61x or XMC20 networks are typically physically protected from direct access by unauthorized personnel and have no direct connections to the Internet, as well as are separated from other networks by means of a firewall system that has a minimal number of ports exposed, and others that have to be evaluated case by case. Portable computers and removable storage media should be carefully scanned for viruses before they are connected to a control system.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.41%
Vendor Advisory abb.com Vendor Advisory abb.com
Affected: Hitachi Energy FOX61x
Affected: Hitachi Energy XCM20
Published at:
Updated at:

References

Link Tags
https://search.abb.com/library/Download.aspx?DocumentID=8DBD000062&LanguageCode=en&DocumentPartId=&Action=Launch vendor advisory
https://search.abb.com/library/Download.aspx?DocumentID=8DBD000069&LanguageCode=en&DocumentPartId=&Action=Launch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-40334?
CVE-2021-40334 has been scored as a high severity vulnerability.
How to fix CVE-2021-40334?
To fix CVE-2021-40334: Fixed in FOX61x R15A or XMC20 R15A
Is CVE-2021-40334 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-40334 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-40334?
CVE-2021-40334 affects Hitachi Energy FOX61x, Hitachi Energy XCM20.
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