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CVE-2021-25737

2.7 · LOW

A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node.

Published Sep 6, 2021CWE-184EPSS 1.33%

Overview

CVE-2021-25737 is a low-severity vulnerability. It was published on September 6, 2021 and has a CVSS 3.1 base score of 2.7 (LOW).

This vulnerability has a CVSS 3.1 base score of 2.7, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs.

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/102106Refgroups.google.com/g/kubernetes-security-announce/c/xAiN3924thYRefsecurity.netapp.com/advisory/ntap-20211004-0004/GitHubgithub.com/kubernetes/kubernetes/issues/102106Refgroups.google.com/g/kubernetes-security-announce/c/xAiN3924thYRefsecurity.netapp.com/advisory/ntap-20211004-0004/

How CyberStrike helps

Frequently asked questions

What is CVE-2021-25737?

CVE-2021-25737 is a low-severity vulnerability. It was published on September 6, 2021 and has a CVSS 3.1 base score of 2.7 (LOW).

How severe is CVE-2021-25737?

This vulnerability has a CVSS 3.1 base score of 2.7, 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-2021-25737?

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-2021-25737?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-25737 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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