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CVE-2021-27420

5.3 · MEDIUM

GE UR firmware versions prior to version 8.1x web server task does not properly handle receipt of unsupported HTTP verbs, resulting in the web server becoming temporarily unresponsive after receivi…

Published Mar 23, 2022CWE-20EPSS 1.06%

Overview

CVE-2021-27420 is a medium-severity vulnerability. It was published on March 23, 2022 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

GE UR firmware versions prior to version 8.1x web server task does not properly handle receipt of unsupported HTTP verbs, resulting in the web server becoming temporarily unresponsive after receiving a series of unsupported HTTP requests. When unresponsive, the web server is inaccessible. By itself, this is not particularly significant as the relay remains effective in all other functionality and communication channels.

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

CISAwww.cisa.gov/uscert/ics/advisories/icsa-21-075-02Refwww.gegridsolutions.com/Passport/Login.aspxCISAwww.cisa.gov/uscert/ics/advisories/icsa-21-075-02Refwww.gegridsolutions.com/Passport/Login.aspx

How CyberStrike helps

Frequently asked questions

What is CVE-2021-27420?

CVE-2021-27420 is a medium-severity vulnerability. It was published on March 23, 2022 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2021-27420?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-27420?

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-2021-27420?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-27420 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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