cis-k8s-v1111-1.1.14

DevOps & Security

Ensure that the default administrative credential file ownership is set to root:root (Automated)

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Source SKILL.md: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/CIS_benchmarks/Server_Software/Kubernetes/CIS_Kubernetes_Benchmark_v1.11.1/cis-k8s-v1111-1.1.14/SKILL.md

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CIS Kubernetes Benchmark v1.11.1 - Control 1.1.14

Profile Applicability

Level: 1 - Master Node

Description

Ensure that the admin.conf (and super-admin.conf file, where it exists) file ownership is set to root:root.

Rationale

As part of initial cluster setup, default kubeconfig files are created to be used by the administrator of the cluster. These files contain private keys and certificates which allow for privileged access to the cluster. You should set their file ownership to maintain the integrity and confidentiality of the file. The file(s) should be owned by root:root.

Impact

None.

Audit

Run the below command (based on the file location on your system) on the Control Plane node. For example,

stat -c %U:%G /etc/kubernetes/admin.conf

On Kubernetes version 1.29 and higher run the following command as well:

stat -c %U:%G /etc/kubernetes/super-admin.conf

Verify that the ownership is set to root:root.

Remediation

Run the below command (based on the file location on your system) on the Control Plane node. For example,

chown root:root /etc/kubernetes/admin.conf

On Kubernetes 1.29+ the super-admin.conf file should also be modified, if present. For example,

chown root:root /etc/kubernetes/super-admin.conf

Default Value

By default, admin.conf and super-admin.conf file ownership is set to root:root.

References

CIS Controls

Controls Version	Control	IG 1	IG 2	IG 3
v8	5.4 Restrict Administrator Privileges to Dedicated Administrator AccountsRestrict administrator privileges to dedicated administrator accounts on enterprise assets. Conduct general computing activities, such as internet browsing, email, and productivity suite use, from the user's primary, non-privileged account.	●	●	●
v7	4 Controlled Use of Administrative PrivilegesControlled Use of Administrative Privileges