Access Restriction Bypass Affecting k8s.io/kubernetes/pkg/apis/apps/validation Open this link in a new tab package, versions <1.21.0-rc.0
Proof of concept
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15 Apr 2021
14 Apr 2021
How to fix?
k8s.io/kubernetes/pkg/apis/apps/validation to version 1.21.0-rc.0 or higher.
k8s.io/kubernetes/pkg/apis/apps/validation is a Kubernetes, also known as K8s, is an open source system for managing containerized applications across multiple hosts. It provides basic mechanisms for deployment, maintenance, and scaling of applications.
Affected versions of this package are vulnerable to Access Restriction Bypass. Validating Admission Webhook does not observe some previous fields. A vulnerability was found in kube-apiserver that could allow node updates to bypass a Validating Admission Webhook. The highest threat from this vulnerability is to integrity and availability.