No Drop Capabilities for Containers
- Query id: 21cef75f-289f-470e-8038-c7cee0664164
- Query name: No Drop Capabilities for Containers
- Platform: Terraform
- Severity: Low
- Category: Best Practices
- URL: Github
Description¶
Sees if Kubernetes Drop Capabilities exists to ensure containers security context
Documentation
Code samples¶
Code samples with security vulnerabilities¶
Postitive test num. 1 - tf file
resource "kubernetes_pod" "test1" {
metadata {
name = "terraform-example"
}
spec {
container = [
{
image = "nginx:1.7.9"
name = "example"
security_context = {
capabilities = {
add = ["NET_BIND_SERVICE"]
}
}
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
}
},
{
image = "nginx:1.7.9"
name = "example2"
security_context = {
capabilities = {
drop = ["ALL"]
}
}
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"
}
}
Postitive test num. 2 - tf file
resource "kubernetes_pod" "test2" {
metadata {
name = "terraform-example"
}
spec {
container = [
{
image = "nginx:1.7.9"
name = "example"
security_context = {
allow_privilege_escalation = false
}
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
}
},
{
image = "nginx:1.7.9"
name = "example2"
security_context = {
capabilities = {
drop = ["ALL"]
}
}
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"
}
}
Postitive test num. 3 - tf file
resource "kubernetes_pod" "test3" {
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
}
},
{
image = "nginx:1.7.9"
name = "example2"
security_context = {
capabilities = {
drop = ["ALL"]
}
}
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"
}
}
Code samples without security vulnerabilities¶
Negative test num. 1 - tf file
resource "kubernetes_pod" "negative4" {
metadata {
name = "terraform-example"
}
spec {
container = [
{
image = "nginx:1.7.9"
name = "example"
security_context = {
capabilities = {
drop = ["ALL"]
}
}
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
}
},
{
image = "nginx:1.7.9"
name = "example2"
security_context = {
capabilities = {
drop = ["ALL"]
}
}
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"
}
}