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CVE-2021-43825

6.1 · MEDIUM

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

Published Feb 22, 2022CWE-416EPSS 0.88%

Overview

CVE-2021-43825 is a medium-severity vulnerability. It was published on February 22, 2022 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. 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. Sending a locally generated response must stop further processing of request or response data. Envoy tracks the amount of buffered request and response data and aborts the request if the amount of buffered data is over the limit by sending 413 or 500 responses. However when the buffer overflows while response is processed by the filter chain the operation may not be aborted correctly and result in accessing a freed memory block. If this happens Envoy will crash resulting in a denial of service.

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/148de954ed3585d8b4298b424aa24916d0de6136GitHubgithub.com/envoyproxy/envoy/security/advisories/GHSA-h69p-g6xg-mhhhGitHubgithub.com/envoyproxy/envoy/commit/148de954ed3585d8b4298b424aa24916d0de6136GitHubgithub.com/envoyproxy/envoy/security/advisories/GHSA-h69p-g6xg-mhhh

How CyberStrike helps

Frequently asked questions

What is CVE-2021-43825?

CVE-2021-43825 is a medium-severity vulnerability. It was published on February 22, 2022 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2021-43825?

This vulnerability has a CVSS 3.1 base score of 6.1, 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-2021-43825?

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-2021-43825?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-43825 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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