Access Restriction Bypass Affecting package, versions <1.21.0-rc.0



    Attack Complexity Low
    Privileges Required High
    Integrity High
    Availability High

    Threat Intelligence

    Exploit Maturity Proof of concept
    EPSS 0.07% (29th percentile)
Expand this section
6.5 medium
Expand this section
Red Hat
6.5 medium

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  • published 15 Apr 2021
  • disclosed 14 Apr 2021
  • credit Unknown

How to fix?

Upgrade to version 1.21.0-rc.0 or higher.

Overview 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.