Hello Kubernetes Community,

A security vulnerability has been discovered in Kubernetes windows nodes that could allow a user with the ability to query a node's '/logs' endpoint to execute arbitrary commands on the host.

This issue has been rated Medium with a CVSS v3.1 score of 5.9 (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N) and assigned CVE-2024-9042.

Am I vulnerable?

This CVE affects only Windows worker nodes. Your worker node is vulnerable to this issue if it is running one of the affected versions listed below.

Affected Components

Kubelet

Affected Versions

v1.32.0
v1.31.0 to v1.31.4
v1.30.0 to v1.30.8
<=v1.29.12

How do I mitigate this vulnerability?

To mitigate this vulnerability, you need to upgrade the Kubelet on your Windows worker nodes to one of the fixed versions listed below.

Fixed Versions

v1.32.1
v1.31.5
v1.30.9
v1.29.13

Detection

To detect whether this vulnerability has been exploited, you can examine your cluster's audit logs to search for node 'logs' queries with suspicious inputs.

If you find evidence that this vulnerability has been exploited, please contact security@kubernetes.io

Acknowledgements

This vulnerability was reported by Peled, Tomer and mitigated by Aravindh Puthiyaprambil.