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CRITICAL10.0

GHSA-h8cp-697h-8c8p

Step CA Has Authorization Bypass in ACME and SCEP Provisioners

Quick fix

GHSA-h8cp-697h-8c8p — github.com/smallstep/certificates: upgrade to the fixed version with the command below.

go get github.com/smallstep/certificates@v0.29.0

Details

## Summary

A security fix is now available for Step CA that resolves a vulnerability affecting deployments configured with ACME and/or SCEP provisioners. All operators running these provisioners should upgrade to the latest release (`v0.29.0`) immediately.

The issue was discovered and disclosed by a research team during a security review. There is no evidence of active exploitation.

To limit exploitation risk during a coordinated disclosure window, we are withholding detailed technical information for now. A full write-up will be published in several weeks.

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## Embargo List

If your organization runs Step CA in production and would like advance, embargoed notification of future security updates, visit https://u.step.sm/disclosure to request inclusion on our embargo list.

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## Acknowledgements

This issue was identified and reported by Stephen Kubik of the Cisco Advanced Security Initiatives Group (ASIG)

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Stay safe, and thank you for helping us keep the ecosystem secure.

Are you affected?

Enter the version of the package you're using.

Affected packages

Go/github.com/smallstep/certificates
Introduced in: 0Fixed in: 0.29.0
Fixgo get github.com/smallstep/certificates@v0.29.0

References