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CVE-2023-3955: Kubernetes privilege escalation vulnerability

October 31, 2023 (updated February 13, 2025)

A security issue was discovered in Kubernetes where a user that can create pods on Windows nodes may be able to escalate to admin privileges on those nodes. Kubernetes clusters are only affected if they include Windows nodes.

References

  • github.com/advisories/GHSA-q78c-gwqw-jcmc
  • github.com/kubernetes/kubernetes
  • github.com/kubernetes/kubernetes/commit/38c97fa67ed35f36e730856728c9e3807f63546a
  • github.com/kubernetes/kubernetes/commit/50334505cd27cbe7cf71865388f25a00e29b2596
  • github.com/kubernetes/kubernetes/commit/7da6d72c05dffb3b87e62e2bc8c3228ea12ba1b9
  • github.com/kubernetes/kubernetes/commit/b7547e28f898af37aa2f1107a49111f963250fe6
  • github.com/kubernetes/kubernetes/commit/c4e17abb04728e3a3f9bb26e727b0f978df20ec9
  • github.com/kubernetes/kubernetes/issues/119595
  • github.com/kubernetes/kubernetes/pull/120128
  • github.com/kubernetes/kubernetes/pull/120134
  • github.com/kubernetes/kubernetes/pull/120135
  • github.com/kubernetes/kubernetes/pull/120136
  • github.com/kubernetes/kubernetes/pull/120137
  • github.com/kubernetes/kubernetes/pull/120138
  • groups.google.com/g/kubernetes-security-announce/c/JrX4bb7d83E
  • nvd.nist.gov/vuln/detail/CVE-2023-3955
  • security.netapp.com/advisory/ntap-20231221-0002

Code Behaviors & Features

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Affected versions

All versions before 1.24.17, all versions starting from 1.25.0 before 1.25.13, all versions starting from 1.26.0 before 1.26.8, all versions starting from 1.27.0 before 1.27.5, all versions starting from 1.28.0 before 1.28.1, version 1.28.0

Fixed versions

  • 1.28.1
  • 1.27.5
  • 1.26.8
  • 1.25.13
  • 1.24.17

Solution

Upgrade to versions 1.24.17, 1.25.13, 1.26.8, 1.27.5, 1.28.1 or above.

Impact 8.8 HIGH

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

Learn more about CVSS

Weakness

  • CWE-20: Improper Input Validation

Source file

go/k8s.io/kubernetes/CVE-2023-3955.yml

Spotted a mistake? Edit the file on GitLab.

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