Secure Shell (ssh) Port Exposed in Image

No violationsstackroxhighbuilddeploy

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.8.25A.8.9
NIST SP 800-53 rev. 5: CM-2
PCI DSS 4.0: 2.2.1

Generated artifacts

1 of 5 targets supported

secure-shell-ssh-port-exposed-in-image.rego

# Secure Shell (ssh) Port Exposed in Image (trivy)
# severity: high
# source: stackrox/629f847d-72b1-4009-8891-cbe479ab10ab
package trivy.secure_shell_ssh_port_exposed_in_image

deny[msg] {
  # rule 1
  some inst
  inst := input.Misconfigurations[_].Message
  contains(inst, {"EXPOSE=(22/tcp|\s+22/tcp)"}[_])
  msg := "[high] Secure Shell (ssh) Port Exposed in Image: Alert on deployments exposing port 22, commonly reserved for SSH access."
}

IR (canonical)

{
  "id": "629f847d-72b1-4009-8891-cbe479ab10ab",
  "name": "Secure Shell (ssh) Port Exposed in Image",
  "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": [
    "build",
    "deploy"
  ],
  "eventSource": "none",
  "scope": [],
  "exclusions": [],
  "enforcement": {
    "failBuild": false
  },
  "expression": {
    "op": "criterion",
    "field": "dockerfile-line",
    "values": [
      "EXPOSE=(22/tcp|\\s+22/tcp)"
    ],
    "valuesOp": "or",
    "negate": false
  },
  "disabled": false
}

Original StackRox JSON

{
  "id": "629f847d-72b1-4009-8891-cbe479ab10ab",
  "name": "Secure Shell (ssh) Port Exposed in Image",
  "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": [
    "BUILD",
    "DEPLOY"
  ],
  "eventSource": "NOT_APPLICABLE",
  "exclusions": [],
  "scope": [],
  "severity": "HIGH_SEVERITY",
  "enforcementActions": [],
  "policySections": [
    {
      "sectionName": "",
      "policyGroups": [
        {
          "fieldName": "Dockerfile Line",
          "booleanOperator": "OR",
          "negate": false,
          "values": [
            {
              "value": "EXPOSE=(22/tcp|\\s+22/tcp)"
            }
          ]
        }
      ]
    }
  ],
  "notifiers": [],
  "lastUpdated": null,
  "SORTName": "",
  "SORTLifecycleStage": "",
  "SORTEnforcement": false,
  "policyVersion": "1.1",
  "mitreAttackVectors": [],
  "criteriaLocked": true,
  "mitreVectorsLocked": true,
  "isDefault": true,
  "source": "IMPERATIVE"
}