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Kubernetes kube-apiserver unauthorized access

High severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Sep 25, 2023

Package

gomod k8s.io/apiextensions-apiserver (Go)

Affected versions

>= 0.7.0, < 0.13.9
>= 0.14.0, < 0.14.5
>= 0.15.0, < 0.15.2

Patched versions

0.13.9
0.14.5
0.15.2

Description

The Kubernetes kube-apiserver mistakenly allows access to a cluster-scoped custom resource if the request is made as if the resource were namespaced. Authorizations for the resource accessed in this manner are enforced using roles and role bindings within the namespace, meaning that a user with access only to a resource in one namespace could create, view update or delete the cluster-scoped resource (according to their namespace role privileges). Kubernetes affected versions include versions prior to 1.13.9, versions prior to 1.14.5, versions prior to 1.15.2, and versions 1.7, 1.8, 1.9, 1.10, 1.11, 1.12.

References

Published by the National Vulnerability Database Aug 29, 2019
Published to the GitHub Advisory Database May 24, 2022
Reviewed Jul 17, 2023
Last updated Sep 25, 2023

Severity

High
8.1
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Weaknesses

CVE ID

CVE-2019-11247

GHSA ID

GHSA-fp37-c92q-4pwq
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