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CVE-2022-21655

7.5 · HIGH

Envoy is an open source edge and service proxy, designed for cloud-native applications.

Published Feb 22, 2022CWE-670EPSS 1.15%

Overview

CVE-2022-21655 is a high-severity vulnerability. It was published on February 22, 2022 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

Envoy is an open source edge and service proxy, designed for cloud-native applications. The envoy common router will segfault if an internal redirect selects a route configured with direct response or redirect actions. This will result in a denial of service. As a workaround turn off internal redirects if direct response entries are configured on the same listener.

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

GitHubgithub.com/envoyproxy/envoy/commit/177d608155ba8b11598b9bbf8240e90d8c350682GitHubgithub.com/envoyproxy/envoy/security/advisories/GHSA-7r5p-7fmh-jxpgGitHubgithub.com/envoyproxy/envoy/commit/177d608155ba8b11598b9bbf8240e90d8c350682GitHubgithub.com/envoyproxy/envoy/security/advisories/GHSA-7r5p-7fmh-jxpg

How CyberStrike helps

Frequently asked questions

What is CVE-2022-21655?

CVE-2022-21655 is a high-severity vulnerability. It was published on February 22, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2022-21655?

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-2022-21655?

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-2022-21655?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-21655 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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