Headline
CVE-2023-2431: [Security Advisory] CVE-2023-2431: Bypass of seccomp profile enforcement
A security issue was discovered in Kubelet that allows pods to bypass the seccomp profile enforcement. Pods that use localhost type for seccomp profile but specify an empty profile field, are affected by this issue. In this scenario, this vulnerability allows the pod to run in unconfined (seccomp disabled) mode. This bug affects Kubelet.
Vellore Rajakumar, Sri Saran Balaji
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Jun 15, 2023, 5:41:51 AM (yesterday) Jun 15
to kubernete…@googlegroups.com, d…@kubernetes.io, kubernetes-sec…@googlegroups.com, kubernetes-se…@googlegroups.com, distributo…@kubernetes.io, kubernetes+a…@discoursemail.com
Hello Kubernetes Community,
A security issue was discovered in Kubelet that allows pods to bypass the seccomp profile enforcement. This issue has been rated LOW (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N) (score: 3.4)
Am I vulnerable?
If you have pods in your cluster that use localhost type for seccomp profile but specify an empty profile, then you are affected by this issue. In this scenario, this vulnerability allows the pod to run in “unconfined” (seccomp disabled) mode. This bug affects Kubelet.
Affected Versions
- v1.27.0 - v1.27.1
- v1.26.0 - v1.26.4
- v1.25.0 - v1.25.9
- <= v1.24.13
How do I remediate this vulnerability?
To remediate this vulnerability, you should upgrade your Kubelet to one of the below mentioned versions.
Fixed Versions
This issue is fixed in the following versions:
- v1.27.2
- v1.26.5
- v1.25.10
- V1.24.14
To upgrade, refer to the documentation: https://kubernetes.io/docs/tasks/administer-cluster/cluster-upgrade/
Acknowledgements
This vulnerability was reported by Tim Allclair, and fixed by Craig Ingram.
Thank You,
Balaji on behalf of the Kubernetes Security Response Committee
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A security issue was discovered in Kubelet that allows pods to bypass the seccomp profile enforcement. Pods that use localhost type for seccomp profile but specify an empty profile field, are affected by this issue. In this scenario, this vulnerability allows the pod to run in unconfined (seccomp disabled) mode. This bug affects Kubelet.