STIGQter: STIG Summary: Kubernetes Security Technical Implementation Guide Version: 2 Release: 6 Benchmark Date: 01 Apr 2026:

The Kubernetes Kubelet must have the "readOnlyPort" flag disabled.

DISA Rule

SV-242387r1137639_rule

Vulnerability Number

V-242387

Group Title

SRG-APP-000033-CTR-000095

Rule Version

CNTR-K8-000330

Severity

CAT I

CCI(s)

• CCI-000213 - Enforce approved authorizations for logical access to information and system resources in accordance with applicable access control policies.

Weight

10

Fix Recommendation

On each Control Plane and Worker Node, run the command:
ps -ef | grep kubelet

Remove the "--read-only-port" option if present.

Note the path to the config file (identified by --config).

Edit the config file:
Set "readOnlyPort" to "0" or remove the setting.

Restart the kubelet service using the following command:
systemctl daemon-reload && systemctl restart kubelet

Check Contents

On each Control Plane and Worker Node, run the command:
ps -ef | grep kubelet

If the "--read-only-port" option exists, this is a finding.

Note the path to the config file (identified by --config).

Run the command:
grep -i readOnlyPort <path_to_config_file>

If the setting "readOnlyPort" exists and is not set to "0", this is a finding.

Vulnerability Number

V-242387

Documentable

False

Rule Version

CNTR-K8-000330

Severity Override Guidance

On each Control Plane and Worker Node, run the command:
ps -ef | grep kubelet

If the "--read-only-port" option exists, this is a finding.

Note the path to the config file (identified by --config).

Run the command:
grep -i readOnlyPort <path_to_config_file>

If the setting "readOnlyPort" exists and is not set to "0", this is a finding.

Check Content Reference

M

Target Key

5376