terraform.gcp.security.gcp-gke-kubernetes-rbac-google-groups.gcp-gke-kubernetes-rbac-google-groups
semgrep
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Manage Kubernetes RBAC users with Google Groups for GKE
Run Locally
Run in CI
Defintion
rules:
- id: gcp-gke-kubernetes-rbac-google-groups
patterns:
- pattern: resource
- pattern-inside: |
resource "google_container_cluster" "..." {
...
}
- pattern-not-inside: |
resource "google_container_cluster" "..." {
...
authenticator_groups_config {
...
security_group = "..."
...
}
...
}
message: Manage Kubernetes RBAC users with Google Groups for GKE
metadata:
owasp:
- A05:2017 - Broken Access Control
- A01:2021 - Broken Access Control
cwe:
- "CWE-284: Improper Access Control"
category: security
technology:
- terraform
- gcp
references:
- https://owasp.org/Top10/A01_2021-Broken_Access_Control
subcategory:
- audit
likelihood: LOW
impact: LOW
confidence: LOW
license: Commons Clause License Condition v1.0[LGPL-2.1-only]
vulnerability_class:
- Improper Authorization
languages:
- hcl
severity: WARNING
Examples
gcp-gke-kubernetes-rbac-google-groups.tf
# fail
# ruleid: gcp-gke-kubernetes-rbac-google-groups
resource "google_container_cluster" "fail" {
name = var.name
location = var.location
initial_node_count = 1
project = data.google_project.project.name
network = var.network
subnetwork = var.subnetwork
ip_allocation_policy {
cluster_ipv4_cidr_block = var.ip_allocation_policy["cluster_ipv4_cidr_block"]
cluster_secondary_range_name = var.ip_allocation_policy["cluster_secondary_range_name"]
services_ipv4_cidr_block = var.ip_allocation_policy["services_ipv4_cidr_block"]
services_secondary_range_name = var.ip_allocation_policy["services_secondary_range_name"]
}
}
# ok: gcp-gke-kubernetes-rbac-google-groups
resource "google_container_cluster" "success" {
name = var.name
location = var.location
initial_node_count = 1
project = data.google_project.project.name
network = var.network
subnetwork = var.subnetwork
ip_allocation_policy {
cluster_ipv4_cidr_block = var.ip_allocation_policy["cluster_ipv4_cidr_block"]
cluster_secondary_range_name = var.ip_allocation_policy["cluster_secondary_range_name"]
services_ipv4_cidr_block = var.ip_allocation_policy["services_ipv4_cidr_block"]
services_secondary_range_name = var.ip_allocation_policy["services_secondary_range_name"]
}
authenticator_groups_config {
security_group = "gke-security-groups@yourdomain.com"
}
node_config {
workload_metadata_config {
node_metadata = "GKE_METADATA_SERVER"
}
}
release_channel {
channel = var.release_channel
}
}
Short Link: https://sg.run/nAAY