Service account token automount not disabled
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Id: a9a13d4f-f17a-491b-b074-f54bffffcb4a
Cloud Provider: Kubernetes
Platform: Terraform
Severity: Medium
Category: Insecure Defaults
Learn More
Description
Service account tokens are mounted automatically, even when not necessary. This rule checks Kubernetes resources — kubernetes_pod, kubernetes_deployment, kubernetes_daemonset, kubernetes_job, kubernetes_stateful_set, kubernetes_replication_controller, and kubernetes_cron_job — for the automount_service_account_token attribute and requires it to be set to false. It reports a MissingAttribute when automount_service_account_token is undefined and an IncorrectValue when it is explicitly set to true; remediation is to set automount_service_account_token = false (replacement from true to false when applicable).
Compliant Code Examples
resource "kubernetes_deployment" "example9" {
metadata {
name = "terraform-example"
labels = {
test = "MyExampleApp"
}
}
spec {
replicas = 3
selector {
match_labels = {
test = "MyExampleApp"
}
}
template {
metadata {
labels = {
test = "MyExampleApp"
}
}
spec {
automount_service_account_token = false
container {
image = "nginx:1.7.8"
name = "example"
resources {
limits = {
cpu = "0.5"
memory = "512Mi"
}
requests = {
cpu = "250m"
memory = "50Mi"
}
}
liveness_probe {
http_get {
path = "/nginx_status"
port = 80
http_header {
name = "X-Custom-Header"
value = "Awesome"
}
}
initial_delay_seconds = 3
period_seconds = 3
}
}
}
}
}
}
resource "kubernetes_daemonset" "example22" {
metadata {
name = "terraform-example"
namespace = "something"
labels = {
test = "MyExampleApp"
}
}
spec {
selector {
match_labels = {
test = "MyExampleApp"
}
}
template {
metadata {
labels = {
test = "MyExampleApp"
}
}
spec {
automount_service_account_token = false
container {
image = "nginx:1.7.8"
name = "example"
resources {
limits = {
cpu = "0.5"
memory = "512Mi"
}
requests = {
cpu = "250m"
memory = "50Mi"
}
}
liveness_probe {
http_get {
path = "/nginx_status"
port = 80
http_header {
name = "X-Custom-Header"
value = "Awesome"
}
}
initial_delay_seconds = 3
period_seconds = 3
}
}
}
}
}
}
resource "kubernetes_cron_job" "demo32" {
metadata {
name = "demo"
}
spec {
concurrency_policy = "Replace"
failed_jobs_history_limit = 5
schedule = "1 0 * * *"
starting_deadline_seconds = 10
successful_jobs_history_limit = 10
job_template {
metadata {}
spec {
backoff_limit = 2
ttl_seconds_after_finished = 10
template {
metadata {}
spec {
automount_service_account_token = false
container {
name = "hello"
image = "busybox"
command = ["/bin/sh", "-c", "date; echo Hello from the Kubernetes cluster"]
}
}
}
}
}
}
}
resource "kubernetes_pod" "test62" {
metadata {
name = "terraform-example"
}
spec {
automount_service_account_token = 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_deployment" "example" {
metadata {
name = "terraform-example"
labels = {
test = "MyExampleApp"
}
}
spec {
replicas = 3
selector {
match_labels = {
test = "MyExampleApp"
}
}
template {
metadata {
labels = {
test = "MyExampleApp"
}
}
spec {
container {
image = "nginx:1.7.8"
name = "example"
resources {
limits = {
cpu = "0.5"
memory = "512Mi"
}
requests = {
cpu = "250m"
memory = "50Mi"
}
}
liveness_probe {
http_get {
path = "/nginx_status"
port = 80
http_header {
name = "X-Custom-Header"
value = "Awesome"
}
}
initial_delay_seconds = 3
period_seconds = 3
}
}
}
}
}
}
resource "kubernetes_daemonset" "example2" {
metadata {
name = "terraform-example"
namespace = "something"
labels = {
test = "MyExampleApp"
}
}
spec {
selector {
match_labels = {
test = "MyExampleApp"
}
}
template {
metadata {
labels = {
test = "MyExampleApp"
}
}
spec {
automount_service_account_token = true
container {
image = "nginx:1.7.8"
name = "example"
resources {
limits = {
cpu = "0.5"
memory = "512Mi"
}
requests = {
cpu = "250m"
memory = "50Mi"
}
}
liveness_probe {
http_get {
path = "/nginx_status"
port = 80
http_header {
name = "X-Custom-Header"
value = "Awesome"
}
}
initial_delay_seconds = 3
period_seconds = 3
}
}
}
}
}
}
resource "kubernetes_cron_job" "demo3" {
metadata {
name = "demo"
}
spec {
concurrency_policy = "Replace"
failed_jobs_history_limit = 5
schedule = "1 0 * * *"
starting_deadline_seconds = 10
successful_jobs_history_limit = 10
job_template {
metadata {}
spec {
backoff_limit = 2
ttl_seconds_after_finished = 10
template {
metadata {}
spec {
automount_service_account_token = true
container {
name = "hello"
image = "busybox"
command = ["/bin/sh", "-c", "date; echo Hello from the Kubernetes cluster"]
}
}
}
}
}
}
}
resource "kubernetes_pod" "test6" {
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"
}
}
