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CVE-2020-5668

7.5 · HIGH

Uncontrolled resource consumption vulnerability in MELSEC iQ-R Series modules (R00/01/02CPU firmware version '19' and earlier, R04/08/16/32/120 (EN) CPU firmware version '51' and earlier, R08/16/32…

Published Nov 20, 2020CWE-400EPSS 4.93%

Overview

CVE-2020-5668 is a high-severity vulnerability. It was published on November 20, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Uncontrolled resource consumption vulnerability in MELSEC iQ-R Series modules (R00/01/02CPU firmware version '19' and earlier, R04/08/16/32/120 (EN) CPU firmware version '51' and earlier, R08/16/32/120SFCPU firmware version '22' and earlier, R08/16/32/120PCPU firmware version '25' and earlier, R08/16/32/120PSFCPU firmware version '06' and earlier, RJ71EN71 firmware version '47' and earlier, RJ71GF11-T2 firmware version '47' and earlier, RJ72GF15-T2 firmware version '07' and earlier, RJ71GP21-SX firmware version '47' and earlier, RJ71GP21S-SX firmware version '47' and earlier, and RJ71GN11-T2 firmware version '11' and earlier) allows a remote unauthenticated attacker to cause an error in a CPU unit and cause a denial-of-service (DoS) condition in execution of the program and its communication, or to cause a denial-of-service (DoS) condition in communication via the unit by receiving a specially crafted SLMP packet

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refjvn.jp/vu/JVNVU95980140/index.htmlCISAus-cert.cisa.gov/ics/advisories/icsa-20-324-05Refwww.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-016.pdfRefwww.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-016_en.pdfRefjvn.jp/vu/JVNVU95980140/index.htmlCISAus-cert.cisa.gov/ics/advisories/icsa-20-324-05Refwww.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-016.pdfRefwww.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-016_en.pdf

How CyberStrike helps

Frequently asked questions

What is CVE-2020-5668?

CVE-2020-5668 is a high-severity vulnerability. It was published on November 20, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2020-5668?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-5668?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-5668?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-5668 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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