Improper Authentication in Capsule Proxy

高 8.8CVE-2022-23652 · GHSA-9cwv-cppx-mqjm · GO-2022-0329 · 22/02/2022 公開 · 17/06/2026 更新

要点

CVE-2022-23652 は github.com/clastix/capsule-proxy, capsule-proxy (clastix) に影響する深刻度「高」 (CVSS 8.8) の脆弱性です。
今後30日間に悪用される確率（EPSS）：1.4%（全脆弱性の 72.4% より高い）。
対処：0.2.1 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
github.com/clastix/capsule-proxy Go	`< 0.2.1`	`0.2.1`
capsule-proxy clastix	`< 0.2.1`	`0.2.1`

概要

Impact

Using a malicious Connection header, an attacker with a proper authentication mechanism could start a privilege escalation towards the Kubernetes API Server, being able to exploit the cluster-admin Role bound to capsule-proxy.

Patches

Patch has been merged in the v0.2.1 release.

Workarounds

Upgrading is mandatory.

NVD の説明

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.