Incorrect Authorization Affecting k3s package, versions <1.20.6.1-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.07% (33rd percentile)

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  • Snyk IDSNYK-ALPINE319-K3S-6109695
  • published8 Dec 2023
  • disclosed6 Sept 2021

Introduced: 6 Sep 2021

CVE-2021-25735  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Alpine:3.19 k3s to version 1.20.6.1-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream k3s package and not the k3s package as distributed by Alpine. See How to fix? for Alpine:3.19 relevant fixed versions and status.

A security issue was discovered in kube-apiserver that could allow node updates to bypass a Validating Admission Webhook. Clusters are only affected by this vulnerability if they run a Validating Admission Webhook for Nodes that denies admission based at least partially on the old state of the Node object. Validating Admission Webhook does not observe some previous fields.

CVSS Scores

version 3.1