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mirror of https://github.com/aquasecurity/kube-bench.git synced 2024-11-27 02:18:16 +00:00

Add latest CIS benchmarks

This commit is contained in:
Darius Mejeras 2023-08-09 14:49:43 +03:00
parent d70459b77c
commit 651f12d21c
19 changed files with 2715 additions and 0 deletions

2
cfg/aks-1.3/config.yaml Normal file
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---
## Version-specific settings that override the values in cfg/config.yaml

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---
controls:
version: "aks-1.3"
id: 2
text: "Control Plane Configuration"
type: "controlplane"
groups:
- id: 2.1
text: "Logging"
checks:
- id: 2.1.1
text: "Enable audit Logs"
type: "manual"
remediation: |
Azure audit logs are enabled and managed in the Azure portal. To enable log collection for
the Kubernetes master components in your AKS cluster, open the Azure portal in a web
browser and complete the following steps:
1. Select the resource group for your AKS cluster, such as myResourceGroup. Don't
select the resource group that contains your individual AKS cluster resources, such
as MC_myResourceGroup_myAKSCluster_eastus.
2. On the left-hand side, choose Diagnostic settings.
3. Select your AKS cluster, such as myAKSCluster, then choose to Add diagnostic setting.
4. Enter a name, such as myAKSClusterLogs, then select the option to Send to Log Analytics.
5. Select an existing workspace or create a new one. If you create a workspace, provide
a workspace name, a resource group, and a location.
6. In the list of available logs, select the logs you wish to enable. For this example,
enable the kube-audit and kube-audit-admin logs. Common logs include the kube-
apiserver, kube-controller-manager, and kube-scheduler. You can return and change
the collected logs once Log Analytics workspaces are enabled.
7. When ready, select Save to enable collection of the selected logs.
scored: false

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---
controls:
version: "aks-1.3"
id: 5
text: "Managed Services"
type: "managedservices"
groups:
- id: 5.1
text: "Image Registry and Image Scanning"
checks:
- id: 5.1.1
text: "Ensure Image Vulnerability Scanning using Azure Defender image scanning or a third party provider (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.1.2
text: "Minimize user access to Azure Container Registry (ACR) (Manual)"
type: "manual"
remediation: |
Azure Container Registry
If you use Azure Container Registry (ACR) as your container image store, you need to grant
permissions to the service principal for your AKS cluster to read and pull images. Currently,
the recommended configuration is to use the az aks create or az aks update command to
integrate with a registry and assign the appropriate role for the service principal. For
detailed steps, see Authenticate with Azure Container Registry from Azure Kubernetes
Service.
To avoid needing an Owner or Azure account administrator role, you can configure a
service principal manually or use an existing service principal to authenticate ACR from
AKS. For more information, see ACR authentication with service principals or Authenticate
from Kubernetes with a pull secret.
scored: false
- id: 5.1.3
text: "Minimize cluster access to read-only for Azure Container Registry (ACR) (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.1.4
text: "Minimize Container Registries to only those approved (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.2
text: "Access and identity options for Azure Kubernetes Service (AKS)"
checks:
- id: 5.2.1
text: "Prefer using dedicated AKS Service Accounts (Manual)"
type: "manual"
remediation: |
Azure Active Directory integration
The security of AKS clusters can be enhanced with the integration of Azure Active Directory
(AD). Built on decades of enterprise identity management, Azure AD is a multi-tenant,
cloud-based directory, and identity management service that combines core directory
services, application access management, and identity protection. With Azure AD, you can
integrate on-premises identities into AKS clusters to provide a single source for account
management and security.
Azure Active Directory integration with AKS clusters
With Azure AD-integrated AKS clusters, you can grant users or groups access to Kubernetes
resources within a namespace or across the cluster. To obtain a kubectl configuration
context, a user can run the az aks get-credentials command. When a user then interacts
with the AKS cluster with kubectl, they're prompted to sign in with their Azure AD
credentials. This approach provides a single source for user account management and
password credentials. The user can only access the resources as defined by the cluster
administrator.
Azure AD authentication is provided to AKS clusters with OpenID Connect. OpenID Connect
is an identity layer built on top of the OAuth 2.0 protocol. For more information on OpenID
Connect, see the Open ID connect documentation. From inside of the Kubernetes cluster,
Webhook Token Authentication is used to verify authentication tokens. Webhook token
authentication is configured and managed as part of the AKS cluster.
scored: false
- id: 5.3
text: "Key Management Service (KMS)"
checks:
- id: 5.3.1
text: "Ensure Kubernetes Secrets are encrypted (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.4
text: "Cluster Networking"
checks:
- id: 5.4.1
text: "Restrict Access to the Control Plane Endpoint (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.4.2
text: "Ensure clusters are created with Private Endpoint Enabled and Public Access Disabled (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.4.3
text: "Ensure clusters are created with Private Nodes (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.4.4
text: "Ensure Network Policy is Enabled and set as appropriate (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.4.5
text: "Encrypt traffic to HTTPS load balancers with TLS certificates (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.5
text: "Authentication and Authorization"
checks:
- id: 5.5.1
text: "Manage Kubernetes RBAC users with Azure AD (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.5.2
text: "Use Azure RBAC for Kubernetes Authorization (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.6
text: "Other Cluster Configurations"
checks:
- id: 5.6.1
text: "Restrict untrusted workloads (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.6.2
text: "Hostile multi-tenant workloads (Manual)"
type: "manual"
remediation: "No remediation"
scored: false

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cfg/aks-1.3/master.yaml Normal file
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---
controls:
version: "aks-1.3"
id: 1
text: "Control Plane Components"
type: "master"

298
cfg/aks-1.3/node.yaml Normal file
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---
controls:
version: "aks-1.3"
id: 3
text: "Worker Node Security Configuration"
type: "node"
groups:
- id: 3.1
text: "Worker Node Configuration Files"
checks:
- id: 3.1.1
text: "Ensure that the kubeconfig file permissions are set to 644 or more restrictive (Manual)"
audit: '/bin/sh -c ''if test -e $kubeletkubeconfig; then stat -c permissions=%a $kubeletkubeconfig; fi'' '
tests:
test_items:
- flag: "permissions"
compare:
op: bitmask
value: "644"
remediation: |
Run the below command (based on the file location on your system) on the each worker node.
For example,
chmod 644 $kubeletkubeconfig
scored: false
- id: 3.1.2
text: "Ensure that the kubelet kubeconfig file ownership is set to root:root (Manual)"
audit: '/bin/sh -c ''if test -e $kubeletkubeconfig; then stat -c %U:%G $kubeletkubeconfig; fi'' '
tests:
test_items:
- flag: root:root
remediation: |
Run the below command (based on the file location on your system) on the each worker node.
For example,
chown root:root $kubeletkubeconfig
scored: false
- id: 3.1.3
text: "Ensure that the kubelet configuration file has permissions set to 644 or more restrictive (Manual)"
audit: '/bin/sh -c ''if test -e $kubeletconf; then stat -c permissions=%a $kubeletconf; fi'' '
tests:
test_items:
- flag: "permissions"
compare:
op: bitmask
value: "644"
remediation: |
Run the following command (using the config file location identified in the Audit step)
chmod 644 $kubeletconf
scored: false
- id: 3.1.4
text: "Ensure that the kubelet configuration file ownership is set to root:root (Manual)"
audit: '/bin/sh -c ''if test -e $kubeletconf; then stat -c %U:%G $kubeletconf; fi'' '
tests:
test_items:
- flag: root:root
remediation: |
Run the following command (using the config file location identified in the Audit step)
chown root:root $kubeletconf
scored: false
- id: 3.2
text: "Kubelet"
checks:
- id: 3.2.1
text: "Ensure that the --anonymous-auth argument is set to false (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: "--anonymous-auth"
path: '{.authentication.anonymous.enabled}'
compare:
op: eq
value: false
remediation: |
If using a Kubelet config file, edit the file to set authentication: anonymous: enabled to
false.
If using executable arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
--anonymous-auth=false
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.2
text: "Ensure that the --authorization-mode argument is not set to AlwaysAllow (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --authorization-mode
path: '{.authorization.mode}'
compare:
op: nothave
value: AlwaysAllow
remediation: |
If using a Kubelet config file, edit the file to set authorization: mode to Webhook. If
using executable arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_AUTHZ_ARGS variable.
--authorization-mode=Webhook
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.3
text: "Ensure that the --client-ca-file argument is set as appropriate (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --client-ca-file
path: '{.authentication.x509.clientCAFile}'
set: true
remediation: |
If using a Kubelet config file, edit the file to set authentication: x509: clientCAFile to
the location of the client CA file.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_AUTHZ_ARGS variable.
--client-ca-file=<path/to/client-ca-file>
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.4
text: "Ensure that the --read-only-port argument is set to 0 (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: "--read-only-port"
path: '{.readOnlyPort}'
set: true
compare:
op: eq
value: 0
remediation: |
If using a Kubelet config file, edit the file to set readOnlyPort to 0.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
--read-only-port=0
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.5
text: "Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --streaming-connection-idle-timeout
path: '{.streamingConnectionIdleTimeout}'
set: true
compare:
op: noteq
value: 0
- flag: --streaming-connection-idle-timeout
path: '{.streamingConnectionIdleTimeout}'
set: false
bin_op: or
remediation: |
If using a Kubelet config file, edit the file to set streamingConnectionIdleTimeout to a
value other than 0.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
--streaming-connection-idle-timeout=5m
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.6
text: "Ensure that the --make-iptables-util-chains argument is set to true (Manual) "
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --make-iptables-util-chains
path: '{.makeIPTablesUtilChains}'
set: true
compare:
op: eq
value: true
- flag: --make-iptables-util-chains
path: '{.makeIPTablesUtilChains}'
set: false
bin_op: or
remediation: |
If using a Kubelet config file, edit the file to set makeIPTablesUtilChains: true.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
remove the --make-iptables-util-chains argument from the
KUBELET_SYSTEM_PODS_ARGS variable.
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.7
text: "Ensure that the --hostname-override argument is not set (Manual)"
# This is one of those properties that can only be set as a command line argument.
# To check if the property is set as expected, we need to parse the kubelet command
# instead reading the Kubelet Configuration file.
audit: "/bin/ps -fC $kubeletbin "
tests:
test_items:
- flag: --hostname-override
set: false
remediation: |
Edit the kubelet service file $kubeletsvc
on each worker node and remove the --hostname-override argument from the
KUBELET_SYSTEM_PODS_ARGS variable.
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.8
text: "Ensure that the --event-qps argument is set to 0 or a level which ensures appropriate event capture (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --event-qps
path: '{.eventRecordQPS}'
set: true
compare:
op: eq
value: 0
remediation: |
If using a Kubelet config file, edit the file to set eventRecordQPS: to an appropriate level.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.9
text: "Ensure that the --rotate-certificates argument is not set to false (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --rotate-certificates
path: '{.rotateCertificates}'
set: true
compare:
op: eq
value: true
- flag: --rotate-certificates
path: '{.rotateCertificates}'
set: false
bin_op: or
remediation: |
If using a Kubelet config file, edit the file to add the line rotateCertificates: true or
remove it altogether to use the default value.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS
variable.
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.10
text: "Ensure that the RotateKubeletServerCertificate argument is set to true (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: RotateKubeletServerCertificate
path: '{.featureGates.RotateKubeletServerCertificate}'
set: true
compare:
op: eq
value: true
remediation: |
Edit the kubelet service file $kubeletsvc
on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable.
--feature-gates=RotateKubeletServerCertificate=true
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false

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cfg/aks-1.3/policies.yaml Normal file
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---
controls:
version: "aks-1.3"
id: 4
text: "Policies"
type: "policies"
groups:
- id: 4.1
text: "RBAC and Service Accounts"
checks:
- id: 4.1.1
text: "Ensure that the cluster-admin role is only used where required (Manual)"
type: "manual"
remediation: |
Identify all clusterrolebindings to the cluster-admin role. Check if they are used and
if they need this role or if they could use a role with fewer privileges.
Where possible, first bind users to a lower privileged role and then remove the
clusterrolebinding to the cluster-admin role :
kubectl delete clusterrolebinding [name]
scored: false
- id: 4.1.2
text: "Minimize access to secrets (Manual)"
type: "manual"
remediation: |
Where possible, remove get, list and watch access to secret objects in the cluster.
scored: false
- id: 4.1.3
text: "Minimize wildcard use in Roles and ClusterRoles (Manual)"
type: "manual"
remediation: |
Where possible replace any use of wildcards in clusterroles and roles with specific
objects or actions.
scored: false
- id: 4.1.4
text: "Minimize access to create pods (Manual)"
type: "manual"
remediation: |
Where possible, remove create access to pod objects in the cluster.
scored: false
- id: 4.1.5
text: "Ensure that default service accounts are not actively used. (Manual)"
type: "manual"
remediation: |
Create explicit service accounts wherever a Kubernetes workload requires specific access
to the Kubernetes API server.
Modify the configuration of each default service account to include this value
automountServiceAccountToken: false
scored: false
- id: 4.1.6
text: "Ensure that Service Account Tokens are only mounted where necessary (Manual)"
type: "manual"
remediation: |
Modify the definition of pods and service accounts which do not need to mount service
account tokens to disable it.
scored: false
- id: 4.2
text: "Pod Security Policies"
checks:
- id: 4.2.1
text: "Minimize the admission of privileged containers (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that
the .spec.privileged field is omitted or set to false.
scored: false
- id: 4.2.2
text: "Minimize the admission of containers wishing to share the host process ID namespace (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that the
.spec.hostPID field is omitted or set to false.
scored: false
- id: 4.2.3
text: "Minimize the admission of containers wishing to share the host IPC namespace (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that the
.spec.hostIPC field is omitted or set to false.
scored: false
- id: 4.2.4
text: "Minimize the admission of containers wishing to share the host network namespace (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that the
.spec.hostNetwork field is omitted or set to false.
scored: false
- id: 4.2.5
text: "Minimize the admission of containers with allowPrivilegeEscalation (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that the
.spec.allowPrivilegeEscalation field is omitted or set to false.
scored: false
- id: 4.2.6
text: "Minimize the admission of root containers (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that the
.spec.runAsUser.rule is set to either MustRunAsNonRoot or MustRunAs with the range of
UIDs not including 0.
scored: false
- id: 4.2.7
text: "Minimize the admission of containers with the NET_RAW capability (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that the
.spec.requiredDropCapabilities is set to include either NET_RAW or ALL.
scored: false
- id: 4.2.8
text: "Minimize the admission of containers with added capabilities (Automated)"
type: "manual"
remediation: |
Ensure that allowedCapabilities is not present in PSPs for the cluster unless
it is set to an empty array.
scored: false
- id: 4.2.9
text: "Minimize the admission of containers with capabilities assigned (Manual)"
type: "manual"
remediation: |
Review the use of capabilities in applications running on your cluster. Where a namespace
contains applications which do not require any Linux capabities to operate consider adding
a PSP which forbids the admission of containers which do not drop all capabilities.
scored: false
- id: 4.3
text: "Azure Policy / OPA"
checks: []
- id: 4.4
text: "CNI Plugin"
checks:
- id: 4.4.1
text: "Ensure that the latest CNI version is used (Manual)"
type: "manual"
remediation: |
Review the documentation of AWS CNI plugin, and ensure latest CNI version is used.
scored: false
- id: 4.4.2
text: "Ensure that all Namespaces have Network Policies defined (Manual)"
type: "manual"
remediation: |
Follow the documentation and create NetworkPolicy objects as you need them.
scored: false
- id: 4.5
text: "Secrets Management"
checks:
- id: 4.5.1
text: "Prefer using secrets as files over secrets as environment variables (Manual)"
type: "manual"
remediation: |
If possible, rewrite application code to read secrets from mounted secret files, rather than
from environment variables.
scored: false
- id: 4.5.2
text: "Consider external secret storage (Manual)"
type: "manual"
remediation: |
Refer to the secrets management options offered by your cloud provider or a third-party
secrets management solution.
scored: false
- id: 4.6
text: "Extensible Admission Control"
checks:
- id: 4.6.1
text: "Verify that admission controllers are working as expected (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 4.7
text: "General Policies"
checks:
- id: 4.7.1
text: "Create administrative boundaries between resources using namespaces (Manual)"
type: "manual"
remediation: |
Follow the documentation and create namespaces for objects in your deployment as you need
them.
scored: false
- id: 4.7.2
text: "Apply Security Context to Your Pods and Containers (Manual)"
type: "manual"
remediation: |
Follow the Kubernetes documentation and apply security contexts to your pods. For a
suggested list of security contexts, you may refer to the CIS Security Benchmark for Docker
Containers.
scored: false
- id: 4.7.3
text: "The default namespace should not be used (Manual)"
type: "manual"
remediation: |
Ensure that namespaces are created to allow for appropriate segregation of Kubernetes
resources and that all new resources are created in a specific namespace.
scored: false

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@ -262,12 +262,15 @@ version_mapping:
"eks-1.0.1": "eks-1.0.1" "eks-1.0.1": "eks-1.0.1"
"eks-1.1.0": "eks-1.1.0" "eks-1.1.0": "eks-1.1.0"
"eks-1.2.0": "eks-1.2.0" "eks-1.2.0": "eks-1.2.0"
"eks-1.3.0": "eks-1.3.0"
"gke-1.0": "gke-1.0" "gke-1.0": "gke-1.0"
"gke-1.2.0": "gke-1.2.0" "gke-1.2.0": "gke-1.2.0"
"gke-1.4.0": "gke-1.4.0"
"ocp-3.10": "rh-0.7" "ocp-3.10": "rh-0.7"
"ocp-3.11": "rh-0.7" "ocp-3.11": "rh-0.7"
"ocp-4.0": "rh-1.0" "ocp-4.0": "rh-1.0"
"aks-1.0": "aks-1.0" "aks-1.0": "aks-1.0"
"aks-1.3": "aks-1.3"
"ack-1.0": "ack-1.0" "ack-1.0": "ack-1.0"
"cis-1.6-k3s": "cis-1.6-k3s" "cis-1.6-k3s": "cis-1.6-k3s"
"tkgi-1.2.53": "tkgi-1.2.53" "tkgi-1.2.53": "tkgi-1.2.53"
@ -328,6 +331,12 @@ target_mapping:
- "controlplane" - "controlplane"
- "policies" - "policies"
- "managedservices" - "managedservices"
"gke-1.4.0":
- "master"
- "node"
- "controlplane"
- "policies"
- "managedservices"
"eks-1.0.1": "eks-1.0.1":
- "master" - "master"
- "node" - "node"
@ -346,6 +355,12 @@ target_mapping:
- "controlplane" - "controlplane"
- "policies" - "policies"
- "managedservices" - "managedservices"
"eks-1.3.0":
- "master"
- "node"
- "controlplane"
- "policies"
- "managedservices"
"rh-0.7": "rh-0.7":
- "master" - "master"
- "node" - "node"
@ -355,6 +370,12 @@ target_mapping:
- "controlplane" - "controlplane"
- "policies" - "policies"
- "managedservices" - "managedservices"
"aks-1.3":
- "master"
- "node"
- "controlplane"
- "policies"
- "managedservices"
"ack-1.0": "ack-1.0":
- "master" - "master"
- "node" - "node"

View File

@ -0,0 +1,9 @@
---
## Version-specific settings that override the values in cfg/config.yaml
## These settings are required if you are using the --asff option to report findings to AWS Security Hub
## AWS account number is required.
AWS_ACCOUNT: "<AWS_ACCT_NUMBER>"
## AWS region is required.
AWS_REGION: "<AWS_REGION>"
## EKS Cluster ARN is required.
CLUSTER_ARN: "<AWS_CLUSTER_ARN>"

View File

@ -0,0 +1,14 @@
---
controls:
version: "eks-1.3.0"
id: 2
text: "Control Plane Configuration"
type: "controlplane"
groups:
- id: 2.1
text: "Logging"
checks:
- id: 2.1.1
text: "Enable audit logs (Manual)"
remediation: "Enable control plane logging for API Server, Audit, Authenticator, Controller Manager, and Scheduler."
scored: false

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@ -0,0 +1,154 @@
---
controls:
version: "eks-1.3.0"
id: 5
text: "Managed Services"
type: "managedservices"
groups:
- id: 5.1
text: "Image Registry and Image Scanning"
checks:
- id: 5.1.1
text: "Ensure Image Vulnerability Scanning using Amazon ECR image scanning or a third-party provider (Manual)"
type: "manual"
remediation: |
To utilize AWS ECR for Image scanning please follow the steps below:
To create a repository configured for scan on push (AWS CLI):
aws ecr create-repository --repository-name $REPO_NAME --image-scanning-configuration scanOnPush=true --region $REGION_CODE
To edit the settings of an existing repository (AWS CLI):
aws ecr put-image-scanning-configuration --repository-name $REPO_NAME --image-scanning-configuration scanOnPush=true --region $REGION_CODE
Use the following steps to start a manual image scan using the AWS Management Console.
Open the Amazon ECR console at https://console.aws.amazon.com/ecr/repositories.
From the navigation bar, choose the Region to create your repository in.
In the navigation pane, choose Repositories.
On the Repositories page, choose the repository that contains the image to scan.
On the Images page, select the image to scan and then choose Scan.
scored: false
- id: 5.1.2
text: "Minimize user access to Amazon ECR (Manual)"
type: "manual"
remediation: |
Before you use IAM to manage access to Amazon ECR, you should understand what IAM features
are available to use with Amazon ECR. To get a high-level view of how Amazon ECR and other
AWS services work with IAM, see AWS Services That Work with IAM in the IAM User Guide.
scored: false
- id: 5.1.3
text: "Minimize cluster access to read-only for Amazon ECR (Manual)"
type: "manual"
remediation: |
You can use your Amazon ECR images with Amazon EKS, but you need to satisfy the following prerequisites.
The Amazon EKS worker node IAM role (NodeInstanceRole) that you use with your worker nodes must possess
the following IAM policy permissions for Amazon ECR.
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"ecr:BatchCheckLayerAvailability",
"ecr:BatchGetImage",
"ecr:GetDownloadUrlForLayer",
"ecr:GetAuthorizationToken"
],
"Resource": "*"
}
]
}
scored: false
- id: 5.1.4
text: "Minimize Container Registries to only those approved (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.2
text: "Identity and Access Management (IAM)"
checks:
- id: 5.2.1
text: "Prefer using dedicated Amazon EKS Service Accounts (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.3
text: "AWS Key Management Service (KMS)"
checks:
- id: 5.3.1
text: "Ensure Kubernetes Secrets are encrypted using Customer Master Keys (CMKs) managed in AWS KMS (Manual)"
type: "manual"
remediation: |
This process can only be performed during Cluster Creation.
Enable 'Secrets Encryption' during Amazon EKS cluster creation as described
in the links within the 'References' section.
scored: false
- id: 5.4
text: "Cluster Networking"
checks:
- id: 5.4.1
text: "Restrict Access to the Control Plane Endpoint (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.4.2
text: "Ensure clusters are created with Private Endpoint Enabled and Public Access Disabled (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.4.3
text: "Ensure clusters are created with Private Nodes (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.4.4
text: "Ensure Network Policy is Enabled and set as appropriate (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.4.5
text: "Encrypt traffic to HTTPS load balancers with TLS certificates (Manual)"
type: "manual"
remediation: "No remediation"
scored: false
- id: 5.5
text: "Authentication and Authorization"
checks:
- id: 5.5.1
text: "Manage Kubernetes RBAC users with AWS IAM Authenticator for Kubernetes (Manual)"
type: "manual"
remediation: |
Refer to the 'Managing users or IAM roles for your cluster' in Amazon EKS documentation.
scored: false
- id: 5.6
text: "Other Cluster Configurations"
checks:
- id: 5.6.1
text: "Consider Fargate for running untrusted workloads (Manual)"
type: "manual"
remediation: |
Create a Fargate profile for your cluster Before you can schedule pods running on Fargate
in your cluster, you must define a Fargate profile that specifies which pods should use
Fargate when they are launched. For more information, see AWS Fargate profile.
Note: If you created your cluster with eksctl using the --fargate option, then a Fargate profile has
already been created for your cluster with selectors for all pods in the kube-system
and default namespaces. Use the following procedure to create Fargate profiles for
any other namespaces you would like to use with Fargate.
scored: false

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@ -0,0 +1,6 @@
---
controls:
version: "eks-1.3.0"
id: 1
text: "Control Plane Components"
type: "master"

307
cfg/eks-1.3.0/node.yaml Normal file
View File

@ -0,0 +1,307 @@
---
controls:
version: "eks-1.3.0"
id: 3
text: "Worker Node Security Configuration"
type: "node"
groups:
- id: 3.1
text: "Worker Node Configuration Files"
checks:
- id: 3.1.1
text: "Ensure that the kubeconfig file permissions are set to 644 or more restrictive (Manual)"
audit: '/bin/sh -c ''if test -e $kubeletkubeconfig; then stat -c permissions=%a $kubeletkubeconfig; fi'' '
tests:
test_items:
- flag: "permissions"
compare:
op: bitmask
value: "644"
remediation: |
Run the below command (based on the file location on your system) on the each worker node.
For example,
chmod 644 $kubeletkubeconfig
scored: false
- id: 3.1.2
text: "Ensure that the kubelet kubeconfig file ownership is set to root:root (Manual)"
audit: '/bin/sh -c ''if test -e $kubeletkubeconfig; then stat -c %U:%G $kubeletkubeconfig; fi'' '
tests:
test_items:
- flag: root:root
remediation: |
Run the below command (based on the file location on your system) on the each worker node.
For example,
chown root:root $kubeletkubeconfig
scored: false
- id: 3.1.3
text: "Ensure that the kubelet configuration file has permissions set to 644 or more restrictive (Manual)"
audit: '/bin/sh -c ''if test -e $kubeletconf; then stat -c permissions=%a $kubeletconf; fi'' '
tests:
test_items:
- flag: "permissions"
compare:
op: bitmask
value: "644"
remediation: |
Run the following command (using the config file location identified in the Audit step)
chmod 644 $kubeletconf
scored: false
- id: 3.1.4
text: "Ensure that the kubelet configuration file ownership is set to root:root (Manual)"
audit: '/bin/sh -c ''if test -e $kubeletconf; then stat -c %U:%G $kubeletconf; fi'' '
tests:
test_items:
- flag: root:root
remediation: |
Run the following command (using the config file location identified in the Audit step)
chown root:root $kubeletconf
scored: false
- id: 3.2
text: "Kubelet"
checks:
- id: 3.2.1
text: "Ensure that the Anonymous Auth is Not Enabled (Automated)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: "--anonymous-auth"
path: '{.authentication.anonymous.enabled}'
set: true
compare:
op: eq
value: false
remediation: |
If using a Kubelet config file, edit the file to set authentication: anonymous: enabled to
false.
If using executable arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
--anonymous-auth=false
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true
- id: 3.2.2
text: "Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --authorization-mode
path: '{.authorization.mode}'
set: true
compare:
op: nothave
value: AlwaysAllow
remediation: |
If using a Kubelet config file, edit the file to set authorization: mode to Webhook. If
using executable arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_AUTHZ_ARGS variable.
--authorization-mode=Webhook
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true
- id: 3.2.3
text: "Ensure that a Client CA File is Configured (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --client-ca-file
path: '{.authentication.x509.clientCAFile}'
set: true
remediation: |
If using a Kubelet config file, edit the file to set authentication: x509: clientCAFile to
the location of the client CA file.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_AUTHZ_ARGS variable.
--client-ca-file=<path/to/client-ca-file>
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.4
text: "Ensure that the --read-only-port is disabled (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: "--read-only-port"
path: '{.readOnlyPort}'
set: true
compare:
op: eq
value: 0
remediation: |
If using a Kubelet config file, edit the file to set readOnlyPort to 0.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
--read-only-port=0
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.5
text: "Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Automated)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --streaming-connection-idle-timeout
path: '{.streamingConnectionIdleTimeout}'
set: true
compare:
op: noteq
value: 0
- flag: --streaming-connection-idle-timeout
path: '{.streamingConnectionIdleTimeout}'
set: false
bin_op: or
remediation: |
If using a Kubelet config file, edit the file to set streamingConnectionIdleTimeout to a
value other than 0.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
--streaming-connection-idle-timeout=5m
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true
- id: 3.2.6
text: "Ensure that the --make-iptables-util-chains argument is set to true (Automated) "
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --make-iptables-util-chains
path: '{.makeIPTablesUtilChains}'
set: true
compare:
op: eq
value: true
- flag: --make-iptables-util-chains
path: '{.makeIPTablesUtilChains}'
set: false
bin_op: or
remediation: |
If using a Kubelet config file, edit the file to set makeIPTablesUtilChains: true.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
remove the --make-iptables-util-chains argument from the
KUBELET_SYSTEM_PODS_ARGS variable.
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true
- id: 3.2.7
text: "Ensure that the --hostname-override argument is not set (Manual)"
# This is one of those properties that can only be set as a command line argument.
# To check if the property is set as expected, we need to parse the kubelet command
# instead reading the Kubelet Configuration file.
audit: "/bin/ps -fC $kubeletbin "
tests:
test_items:
- flag: --hostname-override
set: false
remediation: |
Edit the kubelet service file $kubeletsvc
on each worker node and remove the --hostname-override argument from the
KUBELET_SYSTEM_PODS_ARGS variable.
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.8
text: "Ensure that the --eventRecordQPS argument is set to 0 or a level which ensures appropriate event capture (Automated)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --event-qps
path: '{.eventRecordQPS}'
set: true
compare:
op: gte
value: 0
remediation: |
If using a Kubelet config file, edit the file to set eventRecordQPS: to an appropriate level.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.9
text: "Ensure that the --rotate-certificates argument is not present or is set to true (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --rotate-certificates
path: '{.rotateCertificates}'
set: true
compare:
op: eq
value: true
- flag: --rotate-certificates
path: '{.rotateCertificates}'
set: false
bin_op: or
remediation: |
If using a Kubelet config file, edit the file to add the line rotateCertificates: true or
remove it altogether to use the default value.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS
variable.
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.10
text: "Ensure that the RotateKubeletServerCertificate argument is set to true (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: RotateKubeletServerCertificate
path: '{.featureGates.RotateKubeletServerCertificate}'
set: true
compare:
op: eq
value: true
remediation: |
Edit the kubelet service file $kubeletsvc
on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable.
--feature-gates=RotateKubeletServerCertificate=true
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.3
text: "Container Optimized OS"
checks:
- id: 3.3.1
text: "Prefer using a container-optimized OS when possible (Manual)"
remediation: "No remediation"
scored: false

209
cfg/eks-1.3.0/policies.yaml Normal file
View File

@ -0,0 +1,209 @@
---
controls:
version: "eks-1.3.0"
id: 4
text: "Policies"
type: "policies"
groups:
- id: 4.1
text: "RBAC and Service Accounts"
checks:
- id: 4.1.1
text: "Ensure that the cluster-admin role is only used where required (Manual)"
type: "manual"
remediation: |
Identify all clusterrolebindings to the cluster-admin role. Check if they are used and
if they need this role or if they could use a role with fewer privileges.
Where possible, first bind users to a lower privileged role and then remove the
clusterrolebinding to the cluster-admin role :
kubectl delete clusterrolebinding [name]
scored: false
- id: 4.1.2
text: "Minimize access to secrets (Manual)"
type: "manual"
remediation: |
Where possible, remove get, list and watch access to secret objects in the cluster.
scored: false
- id: 4.1.3
text: "Minimize wildcard use in Roles and ClusterRoles (Manual)"
type: "manual"
remediation: |
Where possible replace any use of wildcards in clusterroles and roles with specific
objects or actions.
scored: false
- id: 4.1.4
text: "Minimize access to create pods (Manual)"
type: "manual"
remediation: |
Where possible, remove create access to pod objects in the cluster.
scored: false
- id: 4.1.5
text: "Ensure that default service accounts are not actively used. (Manual)"
type: "manual"
remediation: |
Create explicit service accounts wherever a Kubernetes workload requires specific access
to the Kubernetes API server.
Modify the configuration of each default service account to include this value
automountServiceAccountToken: false
scored: false
- id: 4.1.6
text: "Ensure that Service Account Tokens are only mounted where necessary (Manual)"
type: "manual"
remediation: |
Modify the definition of pods and service accounts which do not need to mount service
account tokens to disable it.
scored: false
- id: 4.1.7
text: "Avoid use of system:masters group (Manual)"
type: "manual"
remediation: |
Remove the system:masters group from all users in the cluster.
scored: false
- id: 4.1.8
text: "Limit use of the Bind, Impersonate and Escalate permissions in the Kubernetes cluster (Manual)"
type: "manual"
remediation: |
Where possible, remove the impersonate, bind and escalate rights from subjects.
scored: false
- id: 4.2
text: "Pod Security Policies"
checks:
- id: 4.2.1
text: "Minimize the admission of privileged containers (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that
the .spec.privileged field is omitted or set to false.
scored: false
- id: 4.2.2
text: "Minimize the admission of containers wishing to share the host process ID namespace (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that the
.spec.hostPID field is omitted or set to false.
scored: false
- id: 4.2.3
text: "Minimize the admission of containers wishing to share the host IPC namespace (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that the
.spec.hostIPC field is omitted or set to false.
scored: false
- id: 4.2.4
text: "Minimize the admission of containers wishing to share the host network namespace (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that the
.spec.hostNetwork field is omitted or set to false.
scored: false
- id: 4.2.5
text: "Minimize the admission of containers with allowPrivilegeEscalation (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that the
.spec.allowPrivilegeEscalation field is omitted or set to false.
scored: false
- id: 4.2.6
text: "Minimize the admission of root containers (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that the
.spec.runAsUser.rule is set to either MustRunAsNonRoot or MustRunAs with the range of
UIDs not including 0.
scored: false
- id: 4.2.7
text: "Minimize the admission of containers with added capabilities (Manual)"
type: "manual"
remediation: |
Ensure that allowedCapabilities is not present in PSPs for the cluster unless
it is set to an empty array.
scored: false
- id: 4.2.8
text: "Minimize the admission of containers with capabilities assigned (Manual)"
type: "manual"
remediation: |
Review the use of capabilities in applications running on your cluster. Where a namespace
contains applications which do not require any Linux capabities to operate consider adding
a PSP which forbids the admission of containers which do not drop all capabilities.
scored: false
- id: 4.3
text: "CNI Plugin"
checks:
- id: 4.3.1
text: "Ensure CNI plugin supports network policies (Manual)"
type: "manual"
remediation: |
As with RBAC policies, network policies should adhere to the policy of least privileged
access. Start by creating a deny all policy that restricts all inbound and outbound traffic
from a namespace or create a global policy using Calico.
scored: false
- id: 4.3.2
text: "Ensure that all Namespaces have Network Policies defined (Manual)"
type: "manual"
remediation: |
Follow the documentation and create NetworkPolicy objects as you need them.
scored: false
- id: 4.4
text: "Secrets Management"
checks:
- id: 4.4.1
text: "Prefer using secrets as files over secrets as environment variables (Manual)"
type: "manual"
remediation: |
If possible, rewrite application code to read secrets from mounted secret files, rather than
from environment variables.
scored: false
- id: 4.4.2
text: "Consider external secret storage (Manual)"
type: "manual"
remediation: |
Refer to the secrets management options offered by your cloud provider or a third-party
secrets management solution.
scored: false
- id: 4.5
text: "General Policies"
checks:
- id: 4.5.1
text: "Create administrative boundaries between resources using namespaces (Manual)"
type: "manual"
remediation: |
Follow the documentation and create namespaces for objects in your deployment as you need
them.
scored: false
- id: 4.5.2
text: "Apply Security Context to Your Pods and Containers (Manual)"
type: "manual"
remediation: |
Follow the Kubernetes documentation and apply security contexts to your pods. For a
suggested list of security contexts, you may refer to the CIS Security Benchmark for Docker
Containers.
scored: false
- id: 4.5.3
text: "The default namespace should not be used (Manual)"
type: "manual"
remediation: |
Ensure that namespaces are created to allow for appropriate segregation of Kubernetes
resources and that all new resources are created in a specific namespace.
scored: false

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@ -0,0 +1,2 @@
---
## Version-specific settings that override the values in cfg/config.yaml

View File

@ -0,0 +1,35 @@
---
controls:
version: "gke-1.4.0"
id: 2
text: "Control Plane Configuration"
type: "controlplane"
groups:
- id: 2.1
text: "Authentication and Authorization"
checks:
- id: 2.1.1
text: "Client certificate authentication should not be used for users (Manual)"
type: "manual"
remediation: |
Alternative mechanisms provided by Kubernetes such as the use of OIDC should be
implemented in place of client certificates.
You can remediate the availability of client certificates in your GKE cluster. See
Recommendation 6.8.2.
scored: false
- id: 2.2
text: "Logging"
type: skip
checks:
- id: 2.2.1
text: "Ensure that a minimal audit policy is created (Manual)"
type: "manual"
remediation: "This control cannot be modified in GKE."
scored: false
- id: 2.2.2
text: "Ensure that the audit policy covers key security concerns (Manual)"
type: "manual"
remediation: "This control cannot be modified in GKE."
scored: false

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@ -0,0 +1,706 @@
---
controls:
version: "gke-1.4.0"
id: 5
text: "Managed Services"
type: "managedservices"
groups:
- id: 5.1
text: "Image Registry and Image Scanning"
checks:
- id: 5.1.1
text: "Ensure Image Vulnerability Scanning using GCR Container Analysis
or a third-party provider (Manual)"
type: "manual"
remediation: |
Using Command Line:
gcloud services enable containerscanning.googleapis.com
scored: false
- id: 5.1.2
text: "Minimize user access to GCR (Manual)"
type: "manual"
remediation: |
Using Command Line:
To change roles at the GCR bucket level:
Firstly, run the following if read permissions are required:
gsutil iam ch [TYPE]:[EMAIL-ADDRESS]:objectViewer
gs://artifacts.[PROJECT_ID].appspot.com
Then remove the excessively privileged role (Storage Admin / Storage Object Admin /
Storage Object Creator) using:
gsutil iam ch -d [TYPE]:[EMAIL-ADDRESS]:[ROLE]
gs://artifacts.[PROJECT_ID].appspot.com
where:
[TYPE] can be one of the following:
o user, if the [EMAIL-ADDRESS] is a Google account
o serviceAccount, if [EMAIL-ADDRESS] specifies a Service account
[EMAIL-ADDRESS] can be one of the following:
o a Google account (for example, someone@example.com)
o a Cloud IAM service account
To modify roles defined at the project level and subsequently inherited within the GCR
bucket, or the Service Account User role, extract the IAM policy file, modify it accordingly
and apply it using:
gcloud projects set-iam-policy [PROJECT_ID] [POLICY_FILE]
scored: false
- id: 5.1.3
text: "Minimize cluster access to read-only for GCR (Manual)"
type: "manual"
remediation: |
Using Command Line:
For an account explicitly granted to the bucket. First, add read access to the Kubernetes
Service Account
gsutil iam ch [TYPE]:[EMAIL-ADDRESS]:objectViewer
gs://artifacts.[PROJECT_ID].appspot.com
where:
[TYPE] can be one of the following:
o user, if the [EMAIL-ADDRESS] is a Google account
o serviceAccount, if [EMAIL-ADDRESS] specifies a Service account
[EMAIL-ADDRESS] can be one of the following:
o a Google account (for example, someone@example.com)
o a Cloud IAM service account
Then remove the excessively privileged role (Storage Admin / Storage Object Admin /
Storage Object Creator) using:
gsutil iam ch -d [TYPE]:[EMAIL-ADDRESS]:[ROLE]
gs://artifacts.[PROJECT_ID].appspot.com
For an account that inherits access to the GCR Bucket through Project level permissions,
modify the Projects IAM policy file accordingly, then upload it using:
gcloud projects set-iam-policy [PROJECT_ID] [POLICY_FILE]
scored: false
- id: 5.1.4
text: "Minimize Container Registries to only those approved (Manual)"
type: "manual"
remediation: |
Using Command Line:
First, update the cluster to enable Binary Authorization:
gcloud container cluster update [CLUSTER_NAME] \
--enable-binauthz
Create a Binary Authorization Policy using the Binary Authorization Policy Reference
(https://cloud.google.com/binary-authorization/docs/policy-yaml-reference) for guidance.
Import the policy file into Binary Authorization:
gcloud container binauthz policy import [YAML_POLICY]
scored: false
- id: 5.2
text: "Identity and Access Management (IAM)"
checks:
- id: 5.2.1
text: "Ensure GKE clusters are not running using the Compute Engine
default service account (Manual)"
type: "manual"
remediation: |
Using Command Line:
Firstly, create a minimally privileged service account:
gcloud iam service-accounts create [SA_NAME] \
--display-name "GKE Node Service Account"
export NODE_SA_EMAIL=`gcloud iam service-accounts list \
--format='value(email)' \
--filter='displayName:GKE Node Service Account'`
Grant the following roles to the service account:
export PROJECT_ID=`gcloud config get-value project`
gcloud projects add-iam-policy-binding $PROJECT_ID \
--member serviceAccount:$NODE_SA_EMAIL \
--role roles/monitoring.metricWriter
gcloud projects add-iam-policy-binding $PROJECT_ID \
--member serviceAccount:$NODE_SA_EMAIL \
--role roles/monitoring.viewer
gcloud projects add-iam-policy-binding $PROJECT_ID \
--member serviceAccount:$NODE_SA_EMAIL \
--role roles/logging.logWriter
To create a new Node pool using the Service account, run the following command:
gcloud container node-pools create [NODE_POOL] \
--service-account=[SA_NAME]@[PROJECT_ID].iam.gserviceaccount.com \
--cluster=[CLUSTER_NAME] --zone [COMPUTE_ZONE]
You will need to migrate your workloads to the new Node pool, and delete Node pools that
use the default service account to complete the remediation.
scored: false
- id: 5.2.2
text: "Prefer using dedicated GCP Service Accounts and Workload Identity (Manual)"
type: "manual"
remediation: |
Using Command Line:
gcloud beta container clusters update [CLUSTER_NAME] --zone [CLUSTER_ZONE] \
--identity-namespace=[PROJECT_ID].svc.id.goog
Note that existing Node pools are unaffected. New Node pools default to --workload-
metadata-from-node=GKE_METADATA_SERVER .
Then, modify existing Node pools to enable GKE_METADATA_SERVER:
gcloud beta container node-pools update [NODEPOOL_NAME] \
--cluster=[CLUSTER_NAME] --zone [CLUSTER_ZONE] \
--workload-metadata-from-node=GKE_METADATA_SERVER
You may also need to modify workloads in order for them to use Workload Identity as
described within https://cloud.google.com/kubernetes-engine/docs/how-to/workload-
identity. Also consider the effects on the availability of your hosted workloads as Node
pools are updated, it may be more appropriate to create new Node Pools.
scored: false
- id: 5.3
text: "Cloud Key Management Service (Cloud KMS)"
checks:
- id: 5.3.1
text: "Ensure Kubernetes Secrets are encrypted using keys managed in Cloud KMS (Manual)"
type: "manual"
remediation: |
Using Command Line:
To create a key
Create a key ring:
gcloud kms keyrings create [RING_NAME] \
--location [LOCATION] \
--project [KEY_PROJECT_ID]
Create a key:
gcloud kms keys create [KEY_NAME] \
--location [LOCATION] \
--keyring [RING_NAME] \
--purpose encryption \
--project [KEY_PROJECT_ID]
Grant the Kubernetes Engine Service Agent service account the Cloud KMS CryptoKey
Encrypter/Decrypter role:
gcloud kms keys add-iam-policy-binding [KEY_NAME] \
--location [LOCATION] \
--keyring [RING_NAME] \
--member serviceAccount:[SERVICE_ACCOUNT_NAME] \
--role roles/cloudkms.cryptoKeyEncrypterDecrypter \
--project [KEY_PROJECT_ID]
To create a new cluster with Application-layer Secrets Encryption:
gcloud container clusters create [CLUSTER_NAME] \
--cluster-version=latest \
--zone [ZONE] \
--database-encryption-key projects/[KEY_PROJECT_ID]/locations/[LOCATION]/keyRings/[RING_NAME]/cryptoKey s/[KEY_NAME] \
--project [CLUSTER_PROJECT_ID]
To enable on an existing cluster:
gcloud container clusters update [CLUSTER_NAME] \
--zone [ZONE] \
--database-encryption-key projects/[KEY_PROJECT_ID]/locations/[LOCATION]/keyRings/[RING_NAME]/cryptoKey s/[KEY_NAME] \
--project [CLUSTER_PROJECT_ID]
scored: false
- id: 5.4
text: "Node Metadata"
checks:
- id: 5.4.1
text: "Ensure legacy Compute Engine instance metadata APIs are Disabled (Automated)"
type: "manual"
remediation: |
Using Command Line:
To update an existing cluster, create a new Node pool with the legacy GCE metadata
endpoint disabled:
gcloud container node-pools create [POOL_NAME] \
--metadata disable-legacy-endpoints=true \
--cluster [CLUSTER_NAME] \
--zone [COMPUTE_ZONE]
You will need to migrate workloads from any existing non-conforming Node pools, to the
new Node pool, then delete non-conforming Node pools to complete the remediation.
scored: false
- id: 5.4.2
text: "Ensure the GKE Metadata Server is Enabled (Automated)"
type: "manual"
remediation: |
Using Command Line:
gcloud beta container clusters update [CLUSTER_NAME] \
--identity-namespace=[PROJECT_ID].svc.id.goog
Note that existing Node pools are unaffected. New Node pools default to --workload-
metadata-from-node=GKE_METADATA_SERVER .
To modify an existing Node pool to enable GKE Metadata Server:
gcloud beta container node-pools update [NODEPOOL_NAME] \
--cluster=[CLUSTER_NAME] \
--workload-metadata-from-node=GKE_METADATA_SERVER
You may also need to modify workloads in order for them to use Workload Identity as
described within https://cloud.google.com/kubernetes-engine/docs/how-to/workload-
identity.
scored: false
- id: 5.5
text: "Node Configuration and Maintenance"
checks:
- id: 5.5.1
text: "Ensure Container-Optimized OS (COS) is used for GKE node images (Automated)"
type: "manual"
remediation: |
Using Command Line:
To set the node image to cos for an existing cluster's Node pool:
gcloud container clusters upgrade [CLUSTER_NAME]\
--image-type cos \
--zone [COMPUTE_ZONE] --node-pool [POOL_NAME]
scored: false
- id: 5.5.2
text: "Ensure Node Auto-Repair is enabled for GKE nodes (Automated)"
type: "manual"
remediation: |
Using Command Line:
To enable node auto-repair for an existing cluster with Node pool, run the following
command:
gcloud container node-pools update [POOL_NAME] \
--cluster [CLUSTER_NAME] --zone [COMPUTE_ZONE] \
--enable-autorepair
scored: false
- id: 5.5.3
text: "Ensure Node Auto-Upgrade is enabled for GKE nodes (Automated)"
type: "manual"
remediation: |
Using Command Line:
To enable node auto-upgrade for an existing cluster's Node pool, run the following
command:
gcloud container node-pools update [NODE_POOL] \
--cluster [CLUSTER_NAME] --zone [COMPUTE_ZONE] \
--enable-autoupgrade
scored: false
- id: 5.5.4
text: "When creating New Clusters - Automate GKE version management using Release Channels (Manual)"
type: "manual"
remediation: |
Using Command Line:
Create a new cluster by running the following command:
gcloud beta container clusters create [CLUSTER_NAME] \
--zone [COMPUTE_ZONE] \
--release-channel [RELEASE_CHANNEL]
where [RELEASE_CHANNEL] is stable or regular according to your needs.
scored: false
- id: 5.5.5
text: "Ensure Shielded GKE Nodes are Enabled (Manual)"
type: "manual"
remediation: |
Using Command Line:
To create a Node pool within the cluster with Integrity Monitoring enabled, run the
following command:
gcloud beta container node-pools create [NODEPOOL_NAME] \
--cluster [CLUSTER_NAME] --zone [COMPUTE_ZONE] \
--shielded-integrity-monitoring
You will also need to migrate workloads from existing non-conforming Node pools to the
newly created Node pool, then delete the non-conforming pools.
scored: false
- id: 5.5.6
text: "Ensure Integrity Monitoring for Shielded GKE Nodes is Enabled (Automated)"
type: "manual"
remediation: |
Using Command Line:
To create a Node pool within the cluster with Integrity Monitoring enabled, run the
following command:
gcloud beta container node-pools create [NODEPOOL_NAME] \
--cluster [CLUSTER_NAME] --zone [COMPUTE_ZONE] \
--shielded-integrity-monitoring
You will also need to migrate workloads from existing non-conforming Node pools to the newly created Node pool,
then delete the non-conforming pools.
scored: false
- id: 5.5.7
text: "Ensure Secure Boot for Shielded GKE Nodes is Enabled (Automated)"
type: "manual"
remediation: |
Using Command Line:
To create a Node pool within the cluster with Secure Boot enabled, run the following
command:
gcloud beta container node-pools create [NODEPOOL_NAME] \
--cluster [CLUSTER_NAME] --zone [COMPUTE_ZONE] \
--shielded-secure-boot
You will also need to migrate workloads from existing non-conforming Node pools to the
newly created Node pool, then delete the non-conforming pools.
scored: false
- id: 5.6
text: "Cluster Networking"
checks:
- id: 5.6.1
text: "Enable VPC Flow Logs and Intranode Visibility (Automated)"
type: "manual"
remediation: |
Using Command Line:
To enable intranode visibility on an existing cluster, run the following command:
gcloud beta container clusters update [CLUSTER_NAME] \
--enable-intra-node-visibility
scored: false
- id: 5.6.2
text: "Ensure use of VPC-native clusters (Automated)"
type: "manual"
remediation: |
Using Command Line:
To enable Alias IP on a new cluster, run the following command:
gcloud container clusters create [CLUSTER_NAME] \
--zone [COMPUTE_ZONE] \
--enable-ip-alias
scored: false
- id: 5.6.3
text: "Ensure Master Authorized Networks is Enabled (Manual)"
type: "manual"
remediation: |
Using Command Line:
To check Master Authorized Networks status for an existing cluster, run the following
command;
gcloud container clusters describe [CLUSTER_NAME] \
--zone [COMPUTE_ZONE] \
--format json | jq '.masterAuthorizedNetworksConfig'
The output should return
{
"enabled": true
}
if Master Authorized Networks is enabled.
If Master Authorized Networks is disabled, the
above command will return null ( { } ).
scored: false
- id: 5.6.4
text: "Ensure clusters are created with Private Endpoint Enabled and Public Access Disabled (Manual)"
type: "manual"
remediation: |
Using Command Line:
Create a cluster with a Private Endpoint enabled and Public Access disabled by including
the --enable-private-endpoint flag within the cluster create command:
gcloud container clusters create [CLUSTER_NAME] \
--enable-private-endpoint
Setting this flag also requires the setting of --enable-private-nodes , --enable-ip-alias
and --master-ipv4-cidr=[MASTER_CIDR_RANGE] .
scored: false
- id: 5.6.5
text: "Ensure clusters are created with Private Nodes (Manual)"
type: "manual"
remediation: |
Using Command Line:
To create a cluster with Private Nodes enabled, include the --enable-private-nodes flag
within the cluster create command:
gcloud container clusters create [CLUSTER_NAME] \
--enable-private-nodes
Setting this flag also requires the setting of --enable-ip-alias and --master-ipv4-
cidr=[MASTER_CIDR_RANGE] .
scored: false
- id: 5.6.6
text: "Consider firewalling GKE worker nodes (Manual)"
type: "manual"
remediation: |
Using Command Line:
Use the following command to generate firewall rules, setting the variables as appropriate.
You may want to use the target [TAG] and [SERVICE_ACCOUNT] previously identified.
gcloud compute firewall-rules create FIREWALL_RULE_NAME \
--network [NETWORK] \
--priority [PRIORITY] \
--direction [DIRECTION] \
--action [ACTION] \
--target-tags [TAG] \
--target-service-accounts [SERVICE_ACCOUNT] \
--source-ranges [SOURCE_CIDR-RANGE] \
--source-tags [SOURCE_TAGS] \
--source-service-accounts=[SOURCE_SERVICE_ACCOUNT] \
--destination-ranges [DESTINATION_CIDR_RANGE] \
--rules [RULES]
scored: false
- id: 5.6.7
text: "Ensure Network Policy is Enabled and set as appropriate (Manual)"
type: "manual"
remediation: |
Using Command Line:
To enable Network Policy for an existing cluster, firstly enable the Network Policy add-on:
gcloud container clusters update [CLUSTER_NAME] \
--zone [COMPUTE_ZONE] \
--update-addons NetworkPolicy=ENABLED
Then, enable Network Policy:
gcloud container clusters update [CLUSTER_NAME] \
--zone [COMPUTE_ZONE] \
--enable-network-policy
scored: false
- id: 5.6.8
text: "Ensure use of Google-managed SSL Certificates (Manual)"
type: "manual"
remediation: |
If services of type:LoadBalancer are discovered, consider replacing the Service with an
Ingress.
To configure the Ingress and use Google-managed SSL certificates, follow the instructions
as listed at https://cloud.google.com/kubernetes-engine/docs/how-to/managed-certs.
scored: false
- id: 5.7
text: "Logging"
checks:
- id: 5.7.1
text: "Ensure Stackdriver Kubernetes Logging and Monitoring is Enabled (Automated)"
type: "manual"
remediation: |
Using Command Line:
STACKDRIVER KUBERNETES ENGINE MONITORING SUPPORT (PREFERRED):
To enable Stackdriver Kubernetes Engine Monitoring for an existing cluster, run the
following command:
gcloud container clusters update [CLUSTER_NAME] \
--zone [COMPUTE_ZONE] \
--enable-stackdriver-kubernetes
LEGACY STACKDRIVER SUPPORT:
Both Logging and Monitoring support must be enabled.
To enable Legacy Stackdriver Logging for an existing cluster, run the following command:
gcloud container clusters update [CLUSTER_NAME] --zone [COMPUTE_ZONE] \
--logging-service logging.googleapis.com
To enable Legacy Stackdriver Monitoring for an existing cluster, run the following
command:
gcloud container clusters update [CLUSTER_NAME] --zone [COMPUTE_ZONE] \
--monitoring-service monitoring.googleapis.com
scored: false
- id: 5.7.2
text: "Enable Linux auditd logging (Manual)"
type: "manual"
remediation: |
Using Command Line:
Download the example manifests:
curl https://raw.githubusercontent.com/GoogleCloudPlatform/k8s-node-tools/master/os-audit/cos-auditd-logging.yaml \
> cos-auditd-logging.yaml
Edit the example manifests if needed. Then, deploy them:
kubectl apply -f cos-auditd-logging.yaml
Verify that the logging Pods have started. If you defined a different Namespace in your
manifests, replace cos-auditd with the name of the namespace you're using:
kubectl get pods --namespace=cos-auditd
scored: false
- id: 5.8
text: "Authentication and Authorization"
checks:
- id: 5.8.1
text: "Ensure Basic Authentication using static passwords is Disabled (Automated)"
type: "manual"
remediation: |
Using Command Line:
To update an existing cluster and disable Basic Authentication by removing the static
password:
gcloud container clusters update [CLUSTER_NAME] \
--no-enable-basic-auth
scored: false
- id: 5.8.2
text: "Ensure authentication using Client Certificates is Disabled (Automated)"
type: "manual"
remediation: |
Using Command Line:
Create a new cluster without a Client Certificate:
gcloud container clusters create [CLUSTER_NAME] \
--no-issue-client-certificate
scored: false
- id: 5.8.3
text: "Manage Kubernetes RBAC users with Google Groups for GKE (Manual)"
type: "manual"
remediation: |
Using Command Line:
Follow the G Suite Groups instructions at https://cloud.google.com/kubernetes-
engine/docs/how-to/role-based-access-control#google-groups-for-gke.
Then, create a cluster with
gcloud beta container clusters create my-cluster \
--security-group="gke-security-groups@[yourdomain.com]"
Finally create Roles, ClusterRoles, RoleBindings, and ClusterRoleBindings that
reference your G Suite Groups.
scored: false
- id: 5.8.4
text: "Ensure Legacy Authorization (ABAC) is Disabled (Automated)"
type: "manual"
remediation: |
Using Command Line:
To disable Legacy Authorization for an existing cluster, run the following command:
gcloud container clusters update [CLUSTER_NAME] \
--zone [COMPUTE_ZONE] \
--no-enable-legacy-authorization
scored: false
- id: 5.9
text: "Storage"
checks:
- id: 5.9.1
text: "Enable Customer-Managed Encryption Keys (CMEK) for GKE Persistent Disks (PD) (Manual)"
type: "manual"
remediation: |
Using Command Line:
FOR NODE BOOT DISKS:
Create a new node pool using customer-managed encryption keys for the node boot disk, of
[DISK_TYPE] either pd-standard or pd-ssd :
gcloud beta container node-pools create [CLUSTER_NAME] \
--disk-type [DISK_TYPE] \
--boot-disk-kms-key \
projects/[KEY_PROJECT_ID]/locations/[LOCATION]/keyRings/[RING_NAME]/cryptoKeys/[KEY_NAME]
Create a cluster using customer-managed encryption keys for the node boot disk, of
[DISK_TYPE] either pd-standard or pd-ssd :
gcloud beta container clusters create [CLUSTER_NAME] \
--disk-type [DISK_TYPE] \
--boot-disk-kms-key \
projects/[KEY_PROJECT_ID]/locations/[LOCATION]/keyRings/[RING_NAME]/cryptoKeys/[KEY_NAME]
FOR ATTACHED DISKS:
Follow the instructions detailed at https://cloud.google.com/kubernetes-
engine/docs/how-to/using-cmek.
scored: false
- id: 5.10
text: "Other Cluster Configurations"
checks:
- id: 5.10.1
text: "Ensure Kubernetes Web UI is Disabled (Automated)"
type: "manual"
remediation: |
Using Command Line:
To disable the Kubernetes Dashboard on an existing cluster, run the following command:
gcloud container clusters update [CLUSTER_NAME] \
--zone [ZONE] \
--update-addons=KubernetesDashboard=DISABLED
scored: false
- id: 5.10.2
text: "Ensure that Alpha clusters are not used for production workloads (Automated)"
type: "manual"
remediation: |
Using Command Line:
Upon creating a new cluster
gcloud container clusters create [CLUSTER_NAME] \
--zone [COMPUTE_ZONE]
Do not use the --enable-kubernetes-alpha argument.
scored: false
- id: 5.10.3
text: "Ensure Pod Security Policy is Enabled and set as appropriate (Manual)"
type: "manual"
remediation: |
Using Command Line:
To enable Pod Security Policy for an existing cluster, run the following command:
gcloud beta container clusters update [CLUSTER_NAME] \
--zone [COMPUTE_ZONE] \
--enable-pod-security-policy
scored: false
- id: 5.10.4
text: "Consider GKE Sandbox for running untrusted workloads (Manual)"
type: "manual"
remediation: |
Using Command Line:
To enable GKE Sandbox on an existing cluster, a new Node pool must be created.
gcloud container node-pools create [NODE_POOL_NAME] \
--zone=[COMPUTE-ZONE] \
--cluster=[CLUSTER_NAME] \
--image-type=cos_containerd \
--sandbox type=gvisor
scored: false
- id: 5.10.5
text: "Ensure use of Binary Authorization (Automated)"
type: "manual"
remediation: |
Using Command Line:
Firstly, update the cluster to enable Binary Authorization:
gcloud container cluster update [CLUSTER_NAME] \
--zone [COMPUTE-ZONE] \
--enable-binauthz
Create a Binary Authorization Policy using the Binary Authorization Policy Reference
(https://cloud.google.com/binary-authorization/docs/policy-yaml-reference) for
guidance.
Import the policy file into Binary Authorization:
gcloud container binauthz policy import [YAML_POLICY]
scored: false
- id: 5.10.6
text: "Enable Cloud Security Command Center (Cloud SCC) (Manual)"
type: "manual"
remediation: |
Using Command Line:
Follow the instructions at https://cloud.google.com/security-command-
center/docs/quickstart-scc-setup.
scored: false

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@ -0,0 +1,6 @@
---
controls:
version: "gke-1.4.0"
id: 1
text: "Control Plane Components"
type: "master"

312
cfg/gke-1.4.0/node.yaml Normal file
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@ -0,0 +1,312 @@
---
controls:
version: "gke-1.4.0"
id: 3
text: "Worker Node Security Configuration"
type: "node"
groups:
- id: 3.1
text: "Worker Node Configuration Files"
checks:
- id: 3.1.1
text: "Ensure that the proxy kubeconfig file permissions are set to 644 or more restrictive (Manual)"
audit: '/bin/sh -c ''if test -e $proxykubeconfig; then stat -c permissions=%a $proxykubeconfig; fi'' '
tests:
test_items:
- flag: "permissions"
compare:
op: bitmask
value: "644"
remediation: |
Run the below command (based on the file location on your system) on each worker node.
For example,
chmod 644 $proxykubeconfig
scored: false
- id: 3.1.2
text: "Ensure that the proxy kubeconfig file ownership is set to root:root (Manual)"
audit: '/bin/sh -c ''if test -e $proxykubeconfig; then stat -c %U:%G $proxykubeconfig; fi'' '
tests:
test_items:
- flag: root:root
remediation: |
Run the below command (based on the file location on your system) on each worker node.
For example, chown root:root $proxykubeconfig
scored: false
- id: 3.1.3
text: "Ensure that the kubelet configuration file permissions are set to 644 or more restrictive (Manual)"
audit: '/bin/sh -c ''if test -e $kubeletconf; then stat -c permissions=%a $kubeletconf; fi'' '
tests:
test_items:
- flag: "permissions"
compare:
op: bitmask
value: "644"
remediation: |
Run the following command (using the config file location identied in the Audit step)
chmod 644 /var/lib/kubelet/config.yaml
scored: false
- id: 3.1.4
text: "Ensure that the kubelet configuration file ownership is set to root:root (Manual)"
audit: '/bin/sh -c ''if test -e $kubeletconf; then stat -c %U:%G $kubeletconf; fi'' '
tests:
test_items:
- flag: root:root
remediation: |
Run the following command (using the config file location identied in the Audit step)
chown root:root /etc/kubernetes/kubelet.conf
scored: false
- id: 3.2
text: "Kubelet"
checks:
- id: 3.2.1
text: "Ensure that the --anonymous-auth argument is set to false (Automated)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: "--anonymous-auth"
path: '{.authentication.anonymous.enabled}'
compare:
op: eq
value: false
remediation: |
If using a Kubelet config file, edit the file to set authentication: anonymous: enabled to
false.
If using executable arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
--anonymous-auth=false
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true
- id: 3.2.2
text: "Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --authorization-mode
path: '{.authorization.mode}'
compare:
op: nothave
value: AlwaysAllow
remediation: |
If using a Kubelet config file, edit the file to set authorization: mode to Webhook. If
using executable arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_AUTHZ_ARGS variable.
--authorization-mode=Webhook
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true
- id: 3.2.3
text: "Ensure that the --client-ca-file argument is set as appropriate (Automated)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --client-ca-file
path: '{.authentication.x509.clientCAFile}'
set: true
remediation: |
If using a Kubelet config file, edit the file to set authentication: x509: clientCAFile to
the location of the client CA file.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_AUTHZ_ARGS variable.
--client-ca-file=<path/to/client-ca-file>
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true
- id: 3.2.4
text: "Ensure that the --read-only-port argument is set to 0 (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: "--read-only-port"
path: '{.readOnlyPort}'
set: true
compare:
op: eq
value: 0
remediation: |
If using a Kubelet config file, edit the file to set readOnlyPort to 0.
If using command line arguments, edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf
on each worker node and set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
--read-only-port=0
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.5
text: "Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Automated)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --streaming-connection-idle-timeout
path: '{.streamingConnectionIdleTimeout}'
compare:
op: noteq
value: 0
- flag: --streaming-connection-idle-timeout
path: '{.streamingConnectionIdleTimeout}'
set: false
bin_op: or
remediation: |
If using a Kubelet config file, edit the file to set streamingConnectionIdleTimeout to a
value other than 0.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
--streaming-connection-idle-timeout=5m
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true
- id: 3.2.6
text: "Ensure that the --make-iptables-util-chains argument is set to true (Automated) "
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --make-iptables-util-chains
path: '{.makeIPTablesUtilChains}'
compare:
op: eq
value: true
- flag: --make-iptables-util-chains
path: '{.makeIPTablesUtilChains}'
set: false
bin_op: or
remediation: |
If using a Kubelet config file, edit the file to set makeIPTablesUtilChains: true.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
remove the --make-iptables-util-chains argument from the
KUBELET_SYSTEM_PODS_ARGS variable.
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true
- id: 3.2.7
text: "Ensure that the --hostname-override argument is not set (Manual)"
audit: "/bin/ps -fC $kubeletbin "
tests:
test_items:
- flag: --hostname-override
set: false
remediation: |
Edit the kubelet service file $kubeletsvc
on each worker node and remove the --hostname-override argument from the
KUBELET_SYSTEM_PODS_ARGS variable.
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.8
text: "Ensure that the --eventrecordqps argument is set to 5 or higher or a level which ensures appropriate event capture (Automated)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --event-qps
path: '{.eventRecordQPS}'
set: true
compare:
op: gte
value: 5
remediation: |
If using a Kubelet config file, edit the file to set eventRecordQPS: to an appropriate level.
If using command line arguments, edit the kubelet service file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf
on each worker node and set the below parameter in KUBELET_SYSTEM_PODS_ARGS variable.
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true
- id: 3.2.9
text: "Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --tls-cert-file
path: '{.tlsCertFile}'
- flag: --tls-private-key-file
path: '{.tlsPrivateKeyFile}'
remediation: |
If using a Kubelet config file, edit the file to set tlsCertFile to the location
of the certificate file to use to identify this Kubelet, and tlsPrivateKeyFile
to the location of the corresponding private key file.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
set the below parameters in KUBELET_CERTIFICATE_ARGS variable.
--tls-cert-file=<path/to/tls-certificate-file>
--tls-private-key-file=<path/to/tls-key-file>
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.10
text: "Ensure that the --rotate-certificates argument is not set to false (Manual)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: --rotate-certificates
path: '{.rotateCertificates}'
compare:
op: eq
value: true
- flag: --rotate-certificates
path: '{.rotateCertificates}'
set: false
bin_op: or
remediation: |
If using a Kubelet config file, edit the file to add the line rotateCertificates: true or
remove it altogether to use the default value.
If using command line arguments, edit the kubelet service file
$kubeletsvc on each worker node and
remove --rotate-certificates=false argument from the KUBELET_CERTIFICATE_ARGS
variable.
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: false
- id: 3.2.11
text: "Ensure that the RotateKubeletServerCertificate argument is set to true (Automated)"
audit: "/bin/ps -fC $kubeletbin"
audit_config: "/bin/cat $kubeletconf"
tests:
test_items:
- flag: RotateKubeletServerCertificate
path: '{.featureGates.RotateKubeletServerCertificate}'
compare:
op: eq
value: true
remediation: |
Edit the kubelet service file $kubeletsvc
on each worker node and set the below parameter in KUBELET_CERTIFICATE_ARGS variable.
--feature-gates=RotateKubeletServerCertificate=true
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
scored: true

239
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@ -0,0 +1,239 @@
---
controls:
version: "gke-1.4.0"
id: 4
text: "Kubernetes Policies"
type: "policies"
groups:
- id: 4.1
text: "RBAC and Service Accounts"
checks:
- id: 4.1.1
text: "Ensure that the cluster-admin role is only used where required (Manual)"
type: "manual"
remediation: |
Identify all clusterrolebindings to the cluster-admin role. Check if they are used and
if they need this role or if they could use a role with fewer privileges.
Where possible, first bind users to a lower privileged role and then remove the
clusterrolebinding to the cluster-admin role :
kubectl delete clusterrolebinding [name]
scored: false
- id: 4.1.2
text: "Minimize access to secrets (Manual)"
type: "manual"
remediation: |
Where possible, remove get, list and watch access to secret objects in the cluster.
scored: false
- id: 4.1.3
text: "Minimize wildcard use in Roles and ClusterRoles (Manual)"
type: "manual"
remediation: |
Where possible replace any use of wildcards in clusterroles and roles with specific
objects or actions.
scored: false
- id: 4.1.4
text: "Minimize access to create pods (Manual)"
type: "manual"
remediation: |
Where possible, remove create access to pod objects in the cluster.
scored: false
- id: 4.1.5
text: "Ensure that default service accounts are not actively used. (Manual)"
type: "manual"
remediation: |
Create explicit service accounts wherever a Kubernetes workload requires specific access
to the Kubernetes API server.
Modify the configuration of each default service account to include this value
automountServiceAccountToken: false
scored: true
- id: 4.1.6
text: "Ensure that Service Account Tokens are only mounted where necessary (Manual)"
type: "manual"
remediation: |
Modify the definition of pods and service accounts which do not need to mount service
account tokens to disable it.
scored: false
- id: 4.2
text: "Pod Security Policies"
checks:
- id: 4.2.1
text: "Minimize the admission of privileged containers (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that
the .spec.privileged field is omitted or set to false.
scored: false
- id: 4.2.2
text: "Minimize the admission of containers wishing to share the host process ID namespace (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that the
.spec.hostPID field is omitted or set to false.
scored: false
- id: 4.2.3
text: "Minimize the admission of containers wishing to share the host IPC namespace (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that the
.spec.hostIPC field is omitted or set to false.
scored: false
- id: 4.2.4
text: "Minimize the admission of containers wishing to share the host network namespace (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that the
.spec.hostNetwork field is omitted or set to false.
scored: false
- id: 4.2.5
text: "Minimize the admission of containers with allowPrivilegeEscalation (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that the
.spec.allowPrivilegeEscalation field is omitted or set to false.
scored: false
- id: 4.2.6
text: "Minimize the admission of root containers (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that the
.spec.runAsUser.rule is set to either MustRunAsNonRoot or MustRunAs with the range of
UIDs not including 0.
scored: false
- id: 4.2.7
text: "Minimize the admission of containers with the NET_RAW capability (Automated)"
type: "manual"
remediation: |
Create a PSP as described in the Kubernetes documentation, ensuring that the
.spec.requiredDropCapabilities is set to include either NET_RAW or ALL.
scored: false
- id: 4.2.8
text: "Minimize the admission of containers with added capabilities (Automated)"
type: "manual"
remediation: |
Ensure that allowedCapabilities is not present in PSPs for the cluster unless
it is set to an empty array.
scored: false
- id: 4.2.9
text: "Minimize the admission of containers with capabilities assigned (Manual) "
type: "manual"
remediation: |
Review the use of capabilites in applications running on your cluster. Where a namespace
contains applications which do not require any Linux capabities to operate consider adding
a PSP which forbids the admission of containers which do not drop all capabilities.
scored: false
- id: 4.3
text: "Network Policies and CNI"
checks:
- id: 4.3.1
text: "Ensure that the CNI in use supports Network Policies (Manual)"
type: "manual"
remediation: |
To use a CNI plugin with Network Policy, enable Network Policy in GKE, and the CNI plugin
will be updated. See Recommendation 6.6.7.
scored: false
- id: 4.3.2
text: "Ensure that all Namespaces have Network Policies defined (Manual)"
type: "manual"
remediation: |
Follow the documentation and create NetworkPolicy objects as you need them.
scored: false
- id: 4.4
text: "Secrets Management"
checks:
- id: 4.4.1
text: "Prefer using secrets as files over secrets as environment variables (Manual)"
type: "manual"
remediation: |
if possible, rewrite application code to read secrets from mounted secret files, rather than
from environment variables.
scored: false
- id: 4.4.2
text: "Consider external secret storage (Manual)"
type: "manual"
remediation: |
Refer to the secrets management options offered by your cloud provider or a third-party
secrets management solution.
scored: false
- id: 4.5
text: "Extensible Admission Control"
checks:
- id: 4.5.1
text: "Configure Image Provenance using ImagePolicyWebhook admission controller (Manual)"
type: "manual"
remediation: |
Follow the Kubernetes documentation and setup image provenance.
See also Recommendation 6.10.5 for GKE specifically.
scored: false
- id: 4.6
text: "General Policies"
checks:
- id: 4.6.1
text: "Create administrative boundaries between resources using namespaces (Manual)"
type: "manual"
remediation: |
Follow the documentation and create namespaces for objects in your deployment as you need
them.
scored: false
- id: 4.6.2
text: "Ensure that the seccomp profile is set to docker/default in your pod definitions (Manual)"
type: "manual"
remediation: |
Seccomp is an alpha feature currently. By default, all alpha features are disabled. So, you
would need to enable alpha features in the apiserver by passing "--feature-
gates=AllAlpha=true" argument.
Edit the /etc/kubernetes/apiserver file on the master node and set the KUBE_API_ARGS
parameter to "--feature-gates=AllAlpha=true"
KUBE_API_ARGS="--feature-gates=AllAlpha=true"
Based on your system, restart the kube-apiserver service. For example:
systemctl restart kube-apiserver.service
Use annotations to enable the docker/default seccomp profile in your pod definitions. An
example is as below:
apiVersion: v1
kind: Pod
metadata:
name: trustworthy-pod
annotations:
seccomp.security.alpha.kubernetes.io/pod: docker/default
spec:
containers:
- name: trustworthy-container
image: sotrustworthy:latest
scored: false
- id: 4.6.3
text: "Apply Security Context to Your Pods and Containers (Manual)"
type: "manual"
remediation: |
Follow the Kubernetes documentation and apply security contexts to your pods. For a
suggested list of security contexts, you may refer to the CIS Security Benchmark for Docker
Containers.
scored: false
- id: 4.6.4
text: "The default namespace should not be used (Manual)"
type: "manual"
remediation: |
Ensure that namespaces are created to allow for appropriate segregation of Kubernetes
resources and that all new resources are created in a specific namespace.
scored: false