Kyverno is a policy engine designed for Kubernetes. In versions of Kyverno prior to 1.10.0, resources which have the `deletionTimestamp` field defined can bypass validate, generate, or mutate-existing policies, even in cases where the `validationFailureAction` field is set to `Enforce`. This situation occurs as resources pending deletion were being consciously exempted by Kyverno, as a way to reduce processing load as policies are typically not applied to objects which are being deleted. However, this could potentially result in allowing a malicious user to leverage the Kubernetes finalizers feature by setting a finalizer which causes the Kubernetes API server to set the `deletionTimestamp` and then not completing the delete operation as a way to explicitly to bypass a Kyverno policy. Note that this is not applicable to Kubernetes Pods but, as an example, a Kubernetes Service resource can be manipulated using an indefinite finalizer to bypass policies. This is resolved in Kyverno 1.10.0. There is no known workaround.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2023-06-01T16:24:53.920Z

Updated: 2024-08-02T16:01:53.601Z

Reserved: 2023-05-25T21:56:51.244Z

Link: CVE-2023-34091

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2023-06-01T17:15:10.873

Modified: 2023-06-09T15:18:11.957

Link: CVE-2023-34091

cve-icon Redhat

No data.