Secure Shell (ssh) Port Exposed

No violationsstackroxhighdeploy

Alert on deployments exposing port 22, commonly reserved for SSH access.

Rationale: Port 22 is reserved for SSH access. SSH should not typically be used within containers.
Remediation: Ensure that non-SSH services are not using port 22. Ensure that any actual SSH servers have been vetted.

CategoriesSecurity Best Practices

Compliance mappingsView coverage →

DORA EU 2022/2554: Art. 9.2
ISO/IEC 27001 2022: A.8.20A.8.9
NIST SP 800-53 rev. 5: CM-2CM-7
PCI DSS 4.0: 1.2.52.2.12.2.4
SOC 2 2017 TSC: CC6.6

Generated artifacts

3 of 5 targets supported

secure-shell-ssh-port-exposed.yaml

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: secure-shell-ssh-port-exposed
  annotations:
    policies.kyverno.io/title: Secure Shell (ssh) Port Exposed
    policies.kyverno.io/category: Security Best Practices
    policies.kyverno.io/severity: high
    policies.kyverno.io/description: Alert on deployments exposing port 22, commonly reserved for SSH access.
    policies.kyverno.io/remediation: Ensure that non-SSH services are not using port 22. Ensure that any actual SSH servers have been vetted.
    policies.kyverno.io/rationale: Port 22 is reserved for SSH access. SSH should not typically be used within containers.
    policies.io/source: stackrox
    policies.io/source-id: 3bf3cec3-d3e8-4512-86ca-b306697d4b75
spec:
  validationFailureAction: Enforce
  background: true
  rules:
    - name: secure-shell-ssh-port-exposed
      match:
        any:
          - resources:
              kinds:
                - Pod
      validate:
        message: 'Policy "Secure Shell (ssh) Port Exposed" violated: Alert on deployments exposing port 22, commonly reserved for SSH access.'
        deny:
          conditions:
            all:
              - key: "{{ request.object.spec.containers[].ports[].containerPort || `[]` }}"
                operator: AnyIn
                value:
                  - 22
              - key: "{{ request.object.spec.containers[].ports[].protocol || `[]` }}"
                operator: AnyIn
                value:
                  - TCP

IR (canonical)

{
  "id": "3bf3cec3-d3e8-4512-86ca-b306697d4b75",
  "name": "Secure Shell (ssh) Port Exposed",
  "description": "Alert on deployments exposing port 22, commonly reserved for SSH access.",
  "rationale": "Port 22 is reserved for SSH access. SSH should not typically be used within containers.",
  "remediation": "Ensure that non-SSH services are not using port 22. Ensure that any actual SSH servers have been vetted.",
  "severity": "high",
  "categories": [
    "Security Best Practices"
  ],
  "lifecycle": [
    "deploy"
  ],
  "eventSource": "none",
  "scope": [],
  "exclusions": [],
  "enforcement": {
    "failBuild": false
  },
  "expression": {
    "op": "and",
    "children": [
      {
        "op": "criterion",
        "field": "exposed-port",
        "values": [
          "22"
        ],
        "valuesOp": "or",
        "negate": false
      },
      {
        "op": "criterion",
        "field": "exposed-port-protocol",
        "values": [
          "tcp"
        ],
        "valuesOp": "or",
        "negate": false
      }
    ]
  },
  "disabled": false
}

Original StackRox JSON

{
  "id": "3bf3cec3-d3e8-4512-86ca-b306697d4b75",
  "name": "Secure Shell (ssh) Port Exposed",
  "description": "Alert on deployments exposing port 22, commonly reserved for SSH access.",
  "rationale": "Port 22 is reserved for SSH access. SSH should not typically be used within containers.",
  "remediation": "Ensure that non-SSH services are not using port 22. Ensure that any actual SSH servers have been vetted.",
  "disabled": false,
  "categories": [
    "Security Best Practices"
  ],
  "lifecycleStages": [
    "DEPLOY"
  ],
  "eventSource": "NOT_APPLICABLE",
  "exclusions": [],
  "scope": [],
  "severity": "HIGH_SEVERITY",
  "enforcementActions": [],
  "policySections": [
    {
      "sectionName": "",
      "policyGroups": [
        {
          "fieldName": "Exposed Port",
          "booleanOperator": "OR",
          "negate": false,
          "values": [
            {
              "value": "22"
            }
          ]
        },
        {
          "fieldName": "Exposed Port Protocol",
          "booleanOperator": "OR",
          "negate": false,
          "values": [
            {
              "value": "tcp"
            }
          ]
        }
      ]
    }
  ],
  "notifiers": [],
  "lastUpdated": null,
  "SORTName": "",
  "SORTLifecycleStage": "",
  "SORTEnforcement": false,
  "policyVersion": "1.1",
  "mitreAttackVectors": [],
  "criteriaLocked": true,
  "mitreVectorsLocked": true,
  "isDefault": true,
  "source": "IMPERATIVE"
}