Network Policy Is Not Targeting Any Pod
- Query id: b80b14c6-aaa2-4876-b651-8a48b6c32fbf
- Query name: Network Policy Is Not Targeting Any Pod
- Platform: Terraform
- Severity: Low
- Category: Networking and Firewall
- CWE: 665
- URL: Github
Description¶
Check if any network policy is not targeting any pod.
Documentation
Code samples¶
Code samples with security vulnerabilities¶
Positive test num. 1 - tf file
resource "kubernetes_network_policy" "example" {
metadata {
name = "terraform-example-network-policy"
namespace = "default"
}
spec {
pod_selector {
match_expressions {
key = "name"
operator = "In"
values = ["webfront", "api"]
}
match_labels = {
app = "ngnix"
}
}
ingress {
ports {
port = "http"
protocol = "TCP"
}
ports {
port = "8125"
protocol = "UDP"
}
from {
namespace_selector {
match_labels = {
name = "default"
}
}
}
from {
ip_block {
cidr = "10.0.0.0/8"
except = [
"10.0.0.0/24",
"10.0.1.0/24",
]
}
}
}
egress {} # single empty rule to allow all egress traffic
policy_types = ["Ingress", "Egress"]
}
}
Code samples without security vulnerabilities¶
Negative test num. 1 - tf file
resource "kubernetes_network_policy" "example2" {
metadata {
name = "terraform-example-network-policy"
namespace = "default"
}
spec {
pod_selector {
match_expressions {
key = "name"
operator = "In"
values = ["webfront", "api"]
}
match_labels = {
app = "ngnix2"
}
}
ingress {
ports {
port = "http"
protocol = "TCP"
}
ports {
port = "8125"
protocol = "UDP"
}
from {
namespace_selector {
match_labels = {
name = "default"
}
}
}
from {
ip_block {
cidr = "10.0.0.0/8"
except = [
"10.0.0.0/24",
"10.0.1.0/24",
]
}
}
}
egress {} # single empty rule to allow all egress traffic
policy_types = ["Ingress", "Egress"]
}
}
resource "kubernetes_pod" "test2" {
metadata {
name = "terraform-example"
labels = {
app = "ngnix2"
}
}
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_network_policy" "example222" {
metadata {
name = "terraform-example-network-policy"
namespace = "default"
}
spec {
pod_selector {
match_expressions {
key = "name"
operator = "In"
values = ["webfront", "api"]
}
match_labels = {
app = "kubernetes_pod.test2.metadata.0.labels.app"
}
}
ingress {
ports {
port = "http"
protocol = "TCP"
}
ports {
port = "8125"
protocol = "UDP"
}
from {
namespace_selector {
match_labels = {
name = "default"
}
}
}
from {
ip_block {
cidr = "10.0.0.0/8"
except = [
"10.0.0.0/24",
"10.0.1.0/24",
]
}
}
}
egress {} # single empty rule to allow all egress traffic
policy_types = ["Ingress", "Egress"]
}
}