CVE-2022-23652 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/clastix/capsule-proxy/commit/efe91f68ebf8a9e3d21491dc57da7b8a746415d8 https://github.com/clastix/capsule-proxy/security/advisories/GHSA-9cwv-cppx-mqjm https://github.com/clastix/capsule-proxy/issues/188

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8