SB2023070829 - openEuler 22.03 LTS SP2 update for kubernetes

Description

This security bulletin contains information about 5 secuirty vulnerabilities.

1) Improper access control (CVE-ID: CVE-2022-3162)

The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. Users authorized to list or watch one type of namespaced custom resource cluster-wide can read custom resources of a different kind in the same API group they are not authorized to read.

2) Input validation error (CVE-ID: CVE-2022-3294)

The vulnerability allows a remote user to execute arbitrary cod on the system.

The vulnerability exists due to users may have access to secure endpoints in the control plane network. A remote user can trigger the vulnerability and allow authenticated requests destined for Nodes to the API server's private network.

3) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2023-2431)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists 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

4) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2023-2727)

The vulnerability allows a remote user to bypass implemented security restrictions.

The vulnerability exists due to improperly imposed security restrictions. A remote user can launch containers using images that are restricted by ImagePolicyWebhook when using ephemeral containers.

Kubernetes clusters are only affected if the ImagePolicyWebhook admission plugin is used together with ephemeral containers.

5) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2023-2728)

The vulnerability allows a remote user to bypass implemented security restrictions.

The vulnerability exists due to improperly imposed security restrictions. A remote user can launch containers that bypass the mountable secrets policy enforced by the ServiceAccount admission plugin when using ephemeral containers.

Kubernetes clusters are only affected if the ServiceAccount admission plugin and the kubernetes.io/enforce-mountable-secrets annotation are used together with ephemeral containers.

Remediation

Install update from vendor's website.

References

• https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2023-1416