cve-2023-34091
Vulnerability from cvelistv5
Published
2023-06-01 16:24
Modified
2025-01-08 21:32
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Summary
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.
References
security-advisories@github.comhttps://github.com/kyverno/kyverno/releases/tag/v1.10.0Release Notes
security-advisories@github.comhttps://github.com/kyverno/kyverno/security/advisories/GHSA-hq4m-4948-64ccVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/kyverno/kyverno/releases/tag/v1.10.0Release Notes
af854a3a-2127-422b-91ae-364da2661108https://github.com/kyverno/kyverno/security/advisories/GHSA-hq4m-4948-64ccVendor Advisory
Impacted products
Vendor Product Version
kyverno kyverno Version: < 1.10.0
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