CVE-2022-3294

Node address isn't always verified when proxying

Published Mar 1, 2023 CVSS 3.1 · 6.6 Medium EPSS 1.6% KEV · Not listed
Description
Users may have access to secure endpoints in the control plane network. Kubernetes clusters are only affected if an untrusted user can modify Node objects and send proxy requests to them. Kubernetes supports node proxying, which allows clients of kube-apiserver to access endpoints of a Kubelet to establish connections to Pods, retrieve container logs, and more. While Kubernetes already validates the proxying address for Nodes, a bug in kube-apiserver made it possible to bypass this validation. Bypassing this validation could allow authenticated requests destined for Nodes to to the API server's private network.

Remediation

Vendor Workaround

Configuring an egress proxy for egress to the cluster network can mitigate this vulnerability

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
EUVD EUVD EUVD-2023-1049 Users may have access to secure endpoints in the control plane network. Kubernetes clusters are only affected if an untrusted user can modify Node objects and send proxy requests to them. Kubernetes supports node proxying, which allows clients of kube-apiserver to access endpoints of a Kubelet to establish connections to Pods, retrieve container logs, and more. While Kubernetes already validates the proxying address for Nodes, a bug in kube-apiserver made it possible to bypass this validation. Bypassing this validation could allow authenticated requests destined for Nodes to to the API server's private network.
Github GHSA Github GHSA GHSA-jh36-q97c-9928 Kubernetes vulnerable to validation bypass
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Sources

Status
PUBLISHED
Assigner
kubernetes
Published
Updated
Mar 7, 2025, 6:34 PM
Reserved
Sep 23, 2022, 12:00 AM
Status
Modified
Published
Mar 1, 2023, 7:15 PM
Modified
Jun 17, 2026, 4:59 AM
Severity
Moderate
Public date
Nov 10, 2022, 5:00 PM