The container platform runtime must enforce the use of ports that are non-privileged.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-233074	SRG-APP-000142	SRG-APP-000142-CTR-000330	SV-233074r1043177_rule	2025-05-15	2

Description
Privileged ports are those ports below 1024 and that require system privileges for their use. If containers are able to use these ports, the container must be run as a privileged user. The container platform must stop containers that try to map to these ports directly. Allowing non-privileged ports to be mapped to the container-privileged port is the allowable method when a certain port is needed. An example is mapping port 8080 externally to port 80 in the container.

Description

Privileged ports are those ports below 1024 and that require system privileges for their use. If containers are able to use these ports, the container must be run as a privileged user. The container platform must stop containers that try to map to these ports directly. Allowing non-privileged ports to be mapped to the container-privileged port is the allowable method when a certain port is needed. An example is mapping port 8080 externally to port 80 in the container.

ℹ️ Check
Review the container platform configuration and the containers within the platform by performing the following checks: 1. Verify the container platform is configured to disallow the use of privileged ports by containers. 2. Validate all containers within the container platform are using non-privileged ports. 3. Attempt to instantiate a container image that uses a privileged port. If the container platform is not configured to disallow the use of privileged ports, this is a finding. If the container platform has containers using privileged ports, this is a finding. If the container platform allows containers to be instantiated that use privileged ports, this is a finding.

ℹ️ Check

Review the container platform configuration and the containers within the platform by performing the following checks: 1. Verify the container platform is configured to disallow the use of privileged ports by containers. 2. Validate all containers within the container platform are using non-privileged ports. 3. Attempt to instantiate a container image that uses a privileged port. If the container platform is not configured to disallow the use of privileged ports, this is a finding. If the container platform has containers using privileged ports, this is a finding. If the container platform allows containers to be instantiated that use privileged ports, this is a finding.

✔️ Fix
Configure the container platform to disallow the use of privileged ports by containers. Move any containers that are using privileged ports to non-privileged ports.