# Cis Ocp V170 1.3.5

> Ensure --bind-address set to 127.0.0.1 (Manual)

- Skill: `cyberstrikeus/cis-ocp-v170-1-3-5` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ocp-v170-1-3-5`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ocp-v170-1-3-5/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: DevOps & Infra
- Author: cyberstrikeus (https://skillmd.com/u/cyberstrikeus)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/cyberstrikeus/cis-ocp-v170-1-3-5

---


# CIS Red Hat OpenShift Container Platform Benchmark v1.7.0 - Control 1.3.5

## Profile Applicability

- **Level:** 1

## Description

Do not bind the Controller Manager service to non-loopback insecure addresses.

## Rationale

The Controller Manager API service which runs on port 10257/TCP by default is used for health and metrics information and is available without authentication or encryption. As such it should only be bound to a localhost interface, to minimize the cluster's attack surface.

## Impact

None.

## Audit Procedure

The `bind-address` argument is not used. The `secure-port` argument is set to `10257`. The `insecure-port` argument is set to `0`.

Use the following command to check the secure port configuration:

```bash
oc get configmaps config -n openshift-kube-controller-manager -ojson | jq -r '.data["config.yaml"]' | jq '.extendedArguments["secure-port"][]'
```

Verify the returned value is `10257`.

Ensure the metrics endpoint is protected from unauthorized access:

```bash
export POD=$(oc get pods -n openshift-kube-controller-manager -l app=kube-controller-manager -o jsonpath='{.items[0].metadata.name}')
oc rsh -n openshift-kube-controller-manager -c kube-controller-manager $POD curl https://localhost:10257/metrics -k
```

Verify an HTTP `403` response is returned and unset environment variables:

```bash
unset POD
```

## Remediation

None.

## Default Value

By default, the `--bind-address` argument is not present, the `secure-port` argument is set to `10257` and the `port` argument is set to `0`.

## References

1. https://docs.openshift.com/container-platform/4.5/operators/operator-reference.html#cluster-openshift-controller-manager-operator_red-hat-operators
2. https://docs.openshift.com/container-platform/4.5/operators/operator-reference.html#kube-controller-manager-operator_red-hat-operators
3. https://github.com/openshift/cluster-kube-controller-manager-operator
4. https://kubernetes.io/docs/reference/command-line-tools-reference/kube-controller-manager/

## CIS Controls

| Controls Version | Control                                                            | IG 1 | IG 2 | IG 3 |
| ---------------- | ------------------------------------------------------------------ | ---- | ---- | ---- |
| v8               | 12.6 Use of Secure Network Management and Communication Protocols  |      | \*   | \*   |
| v7               | 9.2 Ensure Only Approved Ports, Protocols and Services Are Running |      | \*   | \*   |

## MITRE ATT&CK Mappings

| Techniques / Sub-techniques | Tactics | Mitigations |
| --------------------------- | ------- | ----------- |
| T1106                       | TA0002  | M1035       |

## Profile

**Level 1** (Manual)