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CVE-2021-39206

8.6 · HIGH

Pomerium is an open source identity-aware access proxy.

Published Sep 9, 2021CWE-863EPSS 1.46%

Overview

CVE-2021-39206 is a high-severity vulnerability. It was published on September 9, 2021 and has a CVSS 3.1 base score of 8.6 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Pomerium is an open source identity-aware access proxy. Envoy, which Pomerium is based on, contains two authorization related vulnerabilities CVE-2021-32777 and CVE-2021-32779. This may lead to incorrect routing or authorization policy decisions. With specially crafted requests, incorrect authorization or routing decisions may be made by Pomerium. Pomerium v0.14.8 and v0.15.1 contain an upgraded envoy binary with these vulnerabilities patched. This issue can only be triggered when using path prefix based policy. Removing any such policies should provide mitigation.

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/security/advisories/GHSA-6g4j-5vrw-2m8hGitHubgithub.com/envoyproxy/envoy/security/advisories/GHSA-r222-74fw-jqr9GitHubgithub.com/pomerium/pomerium/security/advisories/GHSA-cfc2-wjcm-c8fmRefgroups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJGitHubgithub.com/envoyproxy/envoy/security/advisories/GHSA-6g4j-5vrw-2m8hGitHubgithub.com/envoyproxy/envoy/security/advisories/GHSA-r222-74fw-jqr9GitHubgithub.com/pomerium/pomerium/security/advisories/GHSA-cfc2-wjcm-c8fmRefgroups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ

How CyberStrike helps

Frequently asked questions

What is CVE-2021-39206?

CVE-2021-39206 is a high-severity vulnerability. It was published on September 9, 2021 and has a CVSS 3.1 base score of 8.6 (HIGH).

How severe is CVE-2021-39206?

This vulnerability has a CVSS 3.1 base score of 8.6, 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-2021-39206?

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-2021-39206?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-39206 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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