Container host PID is true

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Metadata

Id: 587d5d82-70cf-449b-9817-f60f9bccb88c

Cloud Provider: Kubernetes

Platform: Terraform

Severity: Medium

Category: Insecure Configurations

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Description

Minimize the admission of containers that request sharing the host process ID namespace. Containers with host_pid enabled can access host processes, increasing the risk of privilege escalation and lateral movement. This rule flags resources where spec.host_pid is set to true. The expected value is false or undefined.

Compliant Code Examples

resource "kubernetes_pod" "negative1" {
  metadata {
    name = "terraform-example"
  }

  spec {
    container {
      image = "nginx:1.7.9"
      name  = "example"


      env {
        name  = "environment"
        value = "test"
      }

      port {
        container_port = 8080
      }

      liveness_probe {
        http_get {
          path = "/nginx_status"
          port = 80

          http_header {
            name  = "X-Custom-Header"
            value = "Awesome"
          }
        }

        initial_delay_seconds = 3
        period_seconds        = 3
      }
    }

    dns_config {
      nameservers = ["1.1.1.1", "8.8.8.8", "9.9.9.9"]
      searches    = ["example.com"]

      option {
        name  = "ndots"
        value = 1
      }

      option {
        name = "use-vc"
      }
    }

    dns_policy = "None"
  }
}









resource "kubernetes_pod" "negative2" {
  metadata {
    name = "terraform-example"
  }

  spec {

    host_pid = false

    container {
      image = "nginx:1.7.9"
      name  = "example"


      env {
        name  = "environment"
        value = "test"
      }

      port {
        container_port = 8080
      }

      liveness_probe {
        http_get {
          path = "/nginx_status"
          port = 80

          http_header {
            name  = "X-Custom-Header"
            value = "Awesome"
          }
        }

        initial_delay_seconds = 3
        period_seconds        = 3
      }
    }

    dns_config {
      nameservers = ["1.1.1.1", "8.8.8.8", "9.9.9.9"]
      searches    = ["example.com"]

      option {
        name  = "ndots"
        value = 1
      }

      option {
        name = "use-vc"
      }
    }

    dns_policy = "None"
  }
}

Non-Compliant Code Examples

resource "kubernetes_pod" "positive1" {
  metadata {
    name = "terraform-example"
  }

  spec {

    host_pid = true

    container {
      image = "nginx:1.7.9"
      name  = "example"


      env {
        name  = "environment"
        value = "test"
      }

      port {
        container_port = 8080
      }

      liveness_probe {
        http_get {
          path = "/nginx_status"
          port = 80

          http_header {
            name  = "X-Custom-Header"
            value = "Awesome"
          }
        }

        initial_delay_seconds = 3
        period_seconds        = 3
      }
    }

    dns_config {
      nameservers = ["1.1.1.1", "8.8.8.8", "9.9.9.9"]
      searches    = ["example.com"]

      option {
        name  = "ndots"
        value = 1
      }

      option {
        name = "use-vc"
      }
    }

    dns_policy = "None"
  }
}