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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Cluster Hardening | 15% | - Component updates & vulnerability mitigation - API access restriction - RBAC configuration - Service account security |
| Topic 2: Supply Chain Security | 20% | - Static analysis tools - Image security & scanning - SBOM & CI/CD security - Signed artifacts & verification - Permitted registries |
| Topic 3: Cluster Setup | 15% | - Network security policies - Secure Ingress configuration - CIS benchmark compliance - Binary verification - Node metadata protection |
| Topic 4: Monitoring, Logging and Runtime Security | 20% | - Audit log configuration - Threat detection (Falco) - Behavioral analytics - Incident investigation - Container immutability |
| Topic 5: System Hardening | 10% | - Network access control - Kernel hardening (AppArmor, seccomp) - Least privilege IAM - Minimize OS attack surface |
| Topic 6: Minimize Microservice Vulnerabilities | 20% | - Pod Security Standards - Isolation & multi-tenancy - OPA/Gatekeeper implementation - Security contexts - Secret management |
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NEW QUESTION # 41
Before Making any changes build the Dockerfile with tag base:v1
Now Analyze and edit the given Dockerfile(based on ubuntu 16:04)
Fixing two instructions present in the file, Check from Security Aspect and Reduce Size point of view.
Dockerfile:
FROM ubuntu:latest
RUN apt-get update -y
RUN apt install nginx -y
COPY entrypoint.sh /
RUN useradd ubuntu
ENTRYPOINT ["/entrypoint.sh"]
USER ubuntu
entrypoint.sh
#!/bin/bash
echo "Hello from CKS"
After fixing the Dockerfile, build the docker-image with the tag base:v2
Answer: A
NEW QUESTION # 42
Task
Analyze and edit the given Dockerfile /home/candidate/KSSC00301/Docker file (based on the ubuntu:16.04 image), fixing two instructions present in the file that are prominent security/best-practice issues.
Analyze and edit the given manifest file /home/candidate/KSSC00301/deployment.yaml, fixing two fields present in the file that are prominent security/best-practice issues.
Answer:
Explanation:
NEW QUESTION # 43
You are deploying a critical application Within your Kubernetes cluster. The application requires access to sensitive data stored in a secret. You want to implement a policy that ensures only authorized pods can access the secret How can you restrict access to the secret to authorized pods?
Answer:
Explanation:
Solution (Step by Step) :
1. Create a Role and RoIeBinding:
- Define a Role that grants access to the specific secret
- Create a RoleBinding that associates the Role with a ServiceAccount that will be used by authorized pods.
2. Example Implementation:
-
3. Granting Access to a Specific Secret: - If you need to restrict access to a specific secret, add a resourceNameS field to the Role definition. 4. Fine-Grained Access Control: - To control access even more granularly, you can define custom RBAC resources using CRDs and custom validation logic.
NEW QUESTION # 44
You are running a critical application within a Kubernetes cluster, and you need to implement a robust security posture to prevent unauthorized access and protect sensitive dat
a. The application uses a PostgreSQL database, and you want to enforce strong access control for the database while ensuring the database pods are not directly accessible from the internet Describe how you would implement the following security measures using Kubernetes resources and tools:
1. Network Policy: Create a network policy that restricts access to the PostgreSQL database pods to only the application pods.
2. Pod Security Policies: Enforce strong security policies for the database pods, including restrictions on capabilities, resource usage, and privileged
access.
3. Secret Management Securely store the database credentials using a Kubernetes secret, ensuring that only authorized application pods can access
them.
4. Logging and Monitoring: Implement logging and monitoring for the PostgreSQL database pods to detect any potential security threats or anomalies.
Answer:
Explanation:
Solution (Step by Step) :
1. Network Policy:
1. Create a network policy:
2. Apply the network policy: basn kubectl apply -f postgres-access-policy.yaml 2. Pod Security Policies: 1. Create a Pod Security Policy:
2. Apply the Pod Security Policy: bash kubectl apply -f postgres-psp.yaml 3. Apply the PSP to the PostgreSQL deployment:
3. Secret Management: 1. Create a secret for the database credentials: bash kubectl create secret generic postgres-credentials --from-literal--username=postgres --from-literal-password-your-password 2. Mount the secret in the PostgreSQL pod:
4. Logging and Monitoring: 1. Configure logging for the PostgreSQL pods: - Use a logging solution like Fluentd or EFK (Elasticsearch, Fluentd, Kibana) to collect logs from the PostgreSQL pods. - Configure the logging solution to capture both application logs and database logs. 2. Implement monitoring: - Use Prometheus and Grafana to monitor the PostgreSQL pods for metrics like CPIJ usage, memory consumption, and database queries. - Set up alerts for any unusual activity or performance degradation- Important Notes: - Replace 'your-namespace' with your actual namespace. - Replace 'your-application' with the name of your application- - Ensure that the service account 'postgres-sa' has access to the secret. - You may need to adjust the PSP based on your specific security requirements. This approach provides a comprehensive security posture for your PostgreSQL database within a Kubernetes cluster, ensuring data integrity and access control while providing the necessary monitoring and logging for early threat detection.
NEW QUESTION # 45
SIMULATION
You can switch the cluster/configuration context using the following command:
[desk@cli] $ kubectl config use-context dev
Context:
A CIS Benchmark tool was run against the kubeadm created cluster and found multiple issues that must be addressed.
Task:
Fix all issues via configuration and restart the affected components to ensure the new settings take effect.
Fix all of the following violations that were found against the API server:
1.2.7 authorization-mode argument is not set to AlwaysAllow FAIL
1.2.8 authorization-mode argument includes Node FAIL
1.2.7 authorization-mode argument includes RBAC FAIL
Fix all of the following violations that were found against the Kubelet:
4.2.1 Ensure that the anonymous-auth argument is set to false FAIL
4.2.2 authorization-mode argument is not set to AlwaysAllow FAIL (Use Webhook autumn/authz where possible) Fix all of the following violations that were found against etcd:
2.2 Ensure that the client-cert-auth argument is set to true
Answer:
Explanation:
See the Explanation below
Explanation:
worker1 $ vim /var/lib/kubelet/config.yaml
anonymous:
enabled: true #Delete this
enabled: false #Replace by this
authorization:
mode: AlwaysAllow #Delete this
mode: Webhook #Replace by this
worker1 $ systemctl restart kubelet. # To reload kubelet config
ssh to master1
master1 $ vim /etc/kubernetes/manifests/kube-apiserver.yaml
- -- authorization-mode=Node,RBAC
master1 $ vim /etc/kubernetes/manifests/etcd.yaml
- --client-cert-auth=true
Explanation:
ssh to worker1
worker1 $ vim /var/lib/kubelet/config.yaml
apiVersion: kubelet.config.k8s.io/v1beta1
authentication:
anonymous:
enabled: true #Delete this
enabled: false #Replace by this
webhook:
cacheTTL: 0s
enabled: true
x509:
clientCAFile: /etc/kubernetes/pki/ca.crt
authorization:
mode: AlwaysAllow #Delete this
mode: Webhook #Replace by this
webhook:
cacheAuthorizedTTL: 0s
cacheUnauthorizedTTL: 0s
cgroupDriver: systemd
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
cpuManagerReconcilePeriod: 0s
evictionPressureTransitionPeriod: 0s
fileCheckFrequency: 0s
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 0s
imageMinimumGCAge: 0s
kind: KubeletConfiguration
logging: {}
nodeStatusReportFrequency: 0s
nodeStatusUpdateFrequency: 0s
resolvConf: /run/systemd/resolve/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 0s
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 0s
syncFrequency: 0s
volumeStatsAggPeriod: 0s
worker1 $ systemctl restart kubelet. # To reload kubelet config
ssh to master1
master1 $ vim /etc/kubernetes/manifests/kube-apiserver.yaml
master1 $ vim /etc/kubernetes/manifests/etcd.yaml
NEW QUESTION # 46
......
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