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| Section | Weight | Objectives |
|---|---|---|
| Supply Chain Security | 20% | - Static analysis tools - SBOM & CI/CD security - Image security & scanning - Permitted registries - Signed artifacts & verification |
| Cluster Setup | 15% | - CIS benchmark compliance - Secure Ingress configuration - Node metadata protection - Binary verification - Network security policies |
| System Hardening | 10% | - Least privilege IAM - Network access control - Minimize OS attack surface - Kernel hardening (AppArmor, seccomp) |
| Monitoring, Logging and Runtime Security | 20% | - Container immutability - Threat detection (Falco) - Behavioral analytics - Incident investigation - Audit log configuration |
| Cluster Hardening | 15% | - Component updates & vulnerability mitigation - API access restriction - RBAC configuration - Service account security |
| Minimize Microservice Vulnerabilities | 20% | - Isolation & multi-tenancy - Pod Security Standards - Secret management - OPA/Gatekeeper implementation - Security contexts |
All these CKS certification exam benefits will not only prove your skills but also assist you to put your career on the right track and achieve your career objectives in a short time period. These are all the advantages of the Certified Kubernetes Security Specialist (CKS) (CKS) certification exam. To avail of all these advantages you just need to enroll in the Linux Foundation exam dumps and pass it with good scores. To pass the CKS exam you can get help from TestsDumps Linux Foundation Questions easily.
NEW QUESTION # 45
SIMULATION
Create a Pod name Nginx-pod inside the namespace testing, Create a service for the Nginx-pod named nginx-svc, using the ingress of your choice, run the ingress on tls, secure port.
Answer: A
NEW QUESTION # 46
You are managing a Kubernetes cluster running on AWS and need to assess the security configuration of the kubelet service against the CIS Kubernetes Benchmark v1 -7.1. You suspect that the '--cgroup-driver' flag is not properly configured, which could potentially expose the cluster to security vulnerabilities. Describe how you would use 'kubectl' to audit the current kubelet configuration and then determine the appropriate configuration tor the '-cgroup-driver' flag based on the CIS benchmark guidance. Assume that the kubelet service is running in a containerized environment.
Answer:
Explanation:
Solution (Step by Step) :
1. Audit the kubelet configuration:
- Execute the following command to retrieve the kubelet configuration:
bash
kubectl get nodes -o jsonpath='{.items0.status.nodelnfo.kubeletVersion}'
- This command will output the kubelet version, which can be used to identifry the specific version of the CIS Kubernetes Benchmark that applies.
- Use 'kubectl describe node to retrieve the kubelet configuration for the specific node.
2. Review the CIS Benchmark guidance:
- Refer to the CIS Kubernetes Benchmark v1 -7.1 document for the specific guidance on the '--cgroup-driver' flag. The benchmark typically recommends using a specific 'cgroup-driver' value depending on the Kubernetes version and the underlying operating systenm
- For example, on a Kubernetes cluster running on AWS, the CIS bencnmark may recommend using the 'systemd' cgroup driver.
3. Determine the current kubelet configuration:
- Check the output of 'kubectl describe node for the value of the flag.
- This will show you the current configuration of the '-cgroup-driver' flag for the kubelet
5. Update the kubelet configuratiom
- Update the kubelet configuration for each node in your cluster to reflect the CIS benchmark recommendation. This may involve editing the kubelet configuration file or using a tool such as kubeadm or kubectl to modify the kubelet configuration.
6. Verify the changes:
- Run the audit commands again to verify that the kubelet configuration has been updated as expected.
NEW QUESTION # 47
You have a Kubernetes cluster with a Deployment named 'my-app' that exposes a service on port 80. You want to enforce a policy that allows only traffic from pods With a specific label to access this service.
Answer:
Explanation:
Solution (Step by Step) :
1. Create a NetworkPolicy:
- Define a NetworkPolicy resource with a 'podSelector' that matches the 'my-app' Deployment.
- Create an 'ingress' rule that allows traffic only from pods with the specific label.
- Use the 'from' field to specify the label selector.
- Ensure that the port 80 is included in the 'ports' field.
2. Apply the NetworkPolicy: - Apply the YAML file using 'kubectl apply -f my-app-label-policy-yamr 3. Verify the NetworkPolicy: - Use 'kubectl get networkpolicies' to list the available network policies. - Use 'kubectl describe networkpolicy my-app-label-policy' to view the details ot the applied policy. 4. Test the NetworkPolicy: - Deploy a pod with the label 'allowed: true' and attempt to access the service on port 80. Verify that the connection is successful. - Deploy a pod without the label 'allowed: true' and attempt to access the service on port 80. Verify that the connection is denied.
NEW QUESTION # 48
You nave a Kubernetes cluster with a Deployment named 'web-app- that runs multiple replicas of a web application. You need to create a network policy that allows only traffic from pods in the same namespace to access the web application's API endpoint on port 8080.
Answer:
Explanation:
Solution (Step by Step) :
1. Create a NetworkP01icy:
- Define a NetworkPoIicy resource with a 'podSeIector that matches the 'web-app' Deployment.
- Create an 'ingress' rule that allows traffic from pods within the same namespace.
- Use the 'from' field to specify the namespace and set the 'namespaceselector' to 'matchLabels: {}' to include all pods in the namespace.
- Ensure that the port 8080 is included in the 'ports' field.
2. Apply the NetworkPolicy: - Apply the YAML file using 'kubectl apply -f web-app-namespace-policy.yaml 3. Verify the NetworkPoIicy: - Use 'kubectl get networkpolicies' to list the available network policies. - Use 'kubectl describe networkpolicy web-app-namespace-policy' to view the details of the applied policy. 4. Test the NetworkPolicy: - Deploy a pod in the same namespace as the 'web-app' Deployment and attempt to access the API endpoint Verify that the connection is successful. - Deploy a pod in a different namespace and attempt to access the API endpoint Verity that the connection is denied.
NEW QUESTION # 49
Fix all issues via configuration and restart the affected components to ensure the new setting takes effect.
Fix all of the following violations that were found against the API server:- a. Ensure the --authorization-mode argument includes RBAC b. Ensure the --authorization-mode argument includes Node c. Ensure that the --profiling argument is set to false Fix all of the following violations that were found against the Kubelet:- a. Ensure the --anonymous-auth argument is set to false.
b. Ensure that the --authorization-mode argument is set to Webhook.
Fix all of the following violations that were found against the ETCD:-
a. Ensure that the --auto-tls argument is not set to true
Hint: Take the use of Tool Kube-Bench
Answer:
Explanation:
API server:
Ensure the --authorization-mode argument includes RBAC
Turn on Role Based Access Control. Role Based Access Control (RBAC) allows fine-grained control over the operations that different entities can perform on different objects in the cluster. It is recommended to use the RBAC authorization mode.
Fix - Buildtime
Kubernetes
apiVersion: v1
kind: Pod
metadata:
creationTimestamp: null
labels:
component: kube-apiserver
tier: control-plane
name: kube-apiserver
namespace: kube-system
spec:
containers:
- command:
+ - kube-apiserver
+ - --authorization-mode=RBAC,Node
image: gcr.io/google_containers/kube-apiserver-amd64:v1.6.0
livenessProbe:
failureThreshold: 8
httpGet:
host: 127.0.0.1
path: /healthz
port: 6443
scheme: HTTPS
initialDelaySeconds: 15
timeoutSeconds: 15
name: kube-apiserver-should-pass
resources:
requests:
cpu: 250m
volumeMounts:
- mountPath: /etc/kubernetes/
name: k8s
readOnly: true
- mountPath: /etc/ssl/certs
name: certs
- mountPath: /etc/pki
name: pki
hostNetwork: true
volumes:
- hostPath:
path: /etc/kubernetes
name: k8s
- hostPath:
path: /etc/ssl/certs
name: certs
- hostPath:
path: /etc/pki
name: pki
Ensure the --authorization-mode argument includes Node
Remediation: Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml on the master node and set the --authorization-mode parameter to a value that includes Node.
--authorization-mode=Node,RBAC
Audit:
/bin/ps -ef | grep kube-apiserver | grep -v grep
Expected result:
'Node,RBAC' has 'Node'
Ensure that the --profiling argument is set to false
Remediation: Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml on the master node and set the below parameter.
--profiling=false
Audit:
/bin/ps -ef | grep kube-apiserver | grep -v grep
Expected result:
'false' is equal to 'false'
Fix all of the following violations that were found against the Kubelet:- Ensure the --anonymous-auth argument is set to 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 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf 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
Audit:
/bin/ps -fC kubelet
Audit Config:
/bin/cat /var/lib/kubelet/config.yaml
Expected result:
'false' is equal to 'false'
2) Ensure that the --authorization-mode argument is set to Webhook.
Audit
docker inspect kubelet | jq -e '.[0].Args[] | match("--authorization-mode=Webhook").string' Returned Value: --authorization-mode=Webhook Fix all of the following violations that were found against the ETCD:- a. Ensure that the --auto-tls argument is not set to true Do not use self-signed certificates for TLS. etcd is a highly-available key value store used by Kubernetes deployments for persistent storage of all of its REST API objects. These objects are sensitive in nature and should not be available to unauthenticated clients. You should enable the client authentication via valid certificates to secure the access to the etcd service.
Fix - Buildtime
Kubernetes
apiVersion: v1
kind: Pod
metadata:
annotations:
scheduler.alpha.kubernetes.io/critical-pod: ""
creationTimestamp: null
labels:
component: etcd
tier: control-plane
name: etcd
namespace: kube-system
spec:
containers:
- command:
+ - etcd
+ - --auto-tls=true
image: k8s.gcr.io/etcd-amd64:3.2.18
imagePullPolicy: IfNotPresent
livenessProbe:
exec:
command:
- /bin/sh
- -ec
- ETCDCTL_API=3 etcdctl --endpoints=https://[192.168.22.9]:2379 --cacert=/etc/kubernetes/pki/etcd/ca.crt
--cert=/etc/kubernetes/pki/etcd/healthcheck-client.crt --key=/etc/kubernetes/pki/etcd/healthcheck-client.key get foo failureThreshold: 8 initialDelaySeconds: 15 timeoutSeconds: 15 name: etcd-should-fail resources: {} volumeMounts:
- mountPath: /var/lib/etcd
name: etcd-data
- mountPath: /etc/kubernetes/pki/etcd
name: etcd-certs
hostNetwork: true
priorityClassName: system-cluster-critical
volumes:
- hostPath:
path: /var/lib/etcd
type: DirectoryOrCreate
name: etcd-data
- hostPath:
path: /etc/kubernetes/pki/etcd
type: DirectoryOrCreate
name: etcd-certs
status: {}
Explanation:
NEW QUESTION # 50
......
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