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CVE-2020-8562

2.2 · LOW

As mitigations to a report from 2019 and CVE-2020-8555, Kubernetes attempts to prevent proxied connections from accessing link-local or localhost networks when making user-driven connections to Ser…

Published Feb 1, 2022CWE-367EPSS 1.08%

Overview

CVE-2020-8562 is a low-severity vulnerability. It was published on February 1, 2022 and has a CVSS 3.1 base score of 2.2 (LOW).

This vulnerability has a CVSS 3.1 base score of 2.2, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

As mitigations to a report from 2019 and CVE-2020-8555, Kubernetes attempts to prevent proxied connections from accessing link-local or localhost networks when making user-driven connections to Services, Pods, Nodes, or StorageClass service providers. As part of this mitigation Kubernetes does a DNS name resolution check and validates that response IPs are not in the link-local (169.254.0.0/16) or localhost (127.0.0.0/8) range. Kubernetes then performs a second DNS resolution without validation for the actual connection. If a non-standard DNS server returns different non-cached responses, a user may be able to bypass the proxy IP restriction and access private networks on the control plane.

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/kubernetes/kubernetes/issues/101493Refgroups.google.com/g/kubernetes-security-announce/c/-MFX60_wdOYRefkubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/Refsecurity.netapp.com/advisory/ntap-20220225-0002/GitHubgithub.com/kubernetes/kubernetes/issues/101493Refgroups.google.com/g/kubernetes-security-announce/c/-MFX60_wdOYRefsecurity.netapp.com/advisory/ntap-20220225-0002/

How CyberStrike helps

Frequently asked questions

What is CVE-2020-8562?

CVE-2020-8562 is a low-severity vulnerability. It was published on February 1, 2022 and has a CVSS 3.1 base score of 2.2 (LOW).

How severe is CVE-2020-8562?

This vulnerability has a CVSS 3.1 base score of 2.2, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2020-8562?

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-2020-8562?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-8562 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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