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CVE-2021-25735: Incorrect Authorization

September 6, 2021 (updated September 13, 2021)

A security issue was discovered in kube-apiserver that could allow node updates to bypass a Validating Admission Webhook.Validating Admission Webhook does not observe some previous fields.

References

  • nvd.nist.gov/vuln/detail/CVE-2021-25735

Code Behaviors & Features

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Affected versions

All versions before 1.18.18, all versions starting from 1.19.0 before 1.19.10, all versions starting from 1.20.0 before 1.20.6

Fixed versions

  • v1.18.18
  • v1.19.10
  • v1.20.6

Solution

Upgrade to version 1.18.18, 1.19.10, 1.20.6, or above.

Impact 6.5 MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

Learn more about CVSS

Source file

go/github.com/kubernetes/kubelet/CVE-2021-25735.yml

Spotted a mistake? Edit the file on GitLab.

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