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Privilege Escalation Affecting istio.io/istio/pilot/pkg/config/kube/gateway package, versions >=1.12.0 <1.12.2

0.0
medium

  • Attack Complexity

    Low

  • Privileges Required

    High

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  • snyk-id

    SNYK-GOLANG-ISTIOIOISTIOPILOTPKGCONFIGKUBEGATEWAY-2348631

  • published

    20 Jan 2022

  • disclosed

    20 Jan 2022

  • credit

    Unknown

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Introduced: 20 Jan 2022

CVE-2022-21701 Open this link in a new tab
CWE-264 Open this link in a new tab

How to fix?

Upgrade istio.io/istio/pilot/pkg/config/kube/gateway to version 1.12.2 or higher.

Overview

Affected versions of this package are vulnerable to Privilege Escalation. Users who have CREATE permission for gateways.gateway.networking.k8s.io objects can escalate this privilege to create other resources that they may not have access to, such as Pod. This vulnerability impacts only an Alpha level feature, the Kubernetes Gateway API.

###Workaround:

  1. Remove the gateways.gateway.networking.k8s.io CustomResourceDefinition, or

  2. Set PILOT_ENABLE_GATEWAY_API_DEPLOYMENT_CONTROLLER=true environment variable in Istiod, or

  3. Remove CREATE permissions for gateways.gateway.networking.k8s.io objects from untrusted users.

References