CVE-2022-23652: Improper Authentication

February 23, 2022 (updated February 26, 2022)

capsule-proxy is a reverse proxy for Capsule Operator which provides multi-tenancy in Kubernetes. In versions prior to 0.2.1 an attacker with a proper authentication mechanism may use a malicious Connection header to start a privilege escalation attack towards the Kubernetes API Server. This vulnerability allows for an exploit of the cluster-admin Role bound to capsule-proxy. There are no known workarounds for this issue.

References

github.com/advisories/GHSA-9cwv-cppx-mqjm
github.com/clastix/capsule-proxy/commit/efe91f68ebf8a9e3d21491dc57da7b8a746415d8
github.com/clastix/capsule-proxy/issues/188
github.com/clastix/capsule-proxy/security/advisories/GHSA-9cwv-cppx-mqjm
nvd.nist.gov/vuln/detail/CVE-2022-23652

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