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| Section | Weight | Objectives |
|---|---|---|
| Monitoring, Logging and Runtime Security | 20% | - Audit log configuration - Behavioral analytics - Container immutability - Incident investigation - Threat detection (Falco) |
| System Hardening | 10% | - Kernel hardening (AppArmor, seccomp) - Minimize OS attack surface - Network access control - Least privilege IAM |
| Supply Chain Security | 20% | - Signed artifacts & verification - Permitted registries - Static analysis tools - Image security & scanning - SBOM & CI/CD security |
| Cluster Hardening | 15% | - Component updates & vulnerability mitigation - RBAC configuration - Service account security - API access restriction |
| Cluster Setup | 15% | - Secure Ingress configuration - CIS benchmark compliance - Node metadata protection - Network security policies - Binary verification |
| Minimize Microservice Vulnerabilities | 20% | - Isolation & multi-tenancy - OPA/Gatekeeper implementation - Secret management - Pod Security Standards - Security contexts |
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NEW QUESTION # 45
You are tasked With securing a Kubernetes cluster that is hosting sensitive applications. You need to implement a robust security posture, including network segmentation, secure communication, and authentication. Explain how you would leverage Pod Security Policies (PSPs) to enforce security controls for pods in the cluster. Provide a practical example of a PSP definition that enforces specific security restrictions.
Answer:
Explanation:
Solution (Step by Step) :
1. Create a Pod Security Policy:
- Define the security policy using a YAML file.
- The file will include specific rules for the policy.
2. Apply the Pod Security Policy: - After creating the policy, you can apply it to the cluster: bash kubectl apply -f restricted-psp.yaml 3. Use the Pod Security Policy: - You can enforce the policy on a pod using the 'securityContext' field in the pod's YAML file. - For example:
4. Enforce the Policy: - The PSP will enforce the specified restrictions on pods that are created using the deployment configuration.
NEW QUESTION # 46
You are deploying a critical application that handles sensitive user dat
a. Your security policy mandates that only specific system calls are allowed for the application container You decide to use seccomp to enforce this policy- Design a seccomp profile that allows only the following system calls: 'read', 'write', 'open', 'close', 'stat', 'fstat' , 'Istat' , 'getpid', 'getuid', 'getgidS , and 'exit_group'.
Answer:
Explanation:
Solution (Step by Step) :
1. Define the Seccomp Profile:
- Create a 'seccomp-json' file with the following content:
2. Apply the Seccomp Profile to the Container: - You can apply the seccomp profile to the container using the 'securitycontext' in your deployment or pod spec - Include the following configuration: - 'securityContext.seccompProfile.type: Locar - 'securitycontextseccompprofile.localsrc: seccomp.json'
3. Test and Verify: - Deploy the application with the seccomp profile. - Run the application and test its functionality- - Verify that the application operates as expected and does not attempt to perform system calls that are not allowed by the seccomp profile. - Use tools like 'straces to monitor the system calls made by the application to confirm that seccomp is enforcing the restrictions.
NEW QUESTION # 47
You are running a critical web application on Kubernetes. You have implemented Pod Security Policies (PSPs) to enforce security restrictions on your pods. You want to configure PSPs to enforce the following security requirements:
Only allow specific image registries: Ensure pods can only pull images from authorized registries like 'docker.ios and 'gcr.ios. Restrict container privileges: Enforce the principle of least privilege by ensuring that only a minimum number of containers have root privileges. Limit resource usage: Prevent resource starvation by restricting the CPU and memory requests of pods.
Provide the detailed configuration for your PSP to enforce these security requirements.
Answer:
Explanation:
Solution (Step by Step) :
1. create a PSP YAML file:
2. Apply the PSP: bash kubectl apply -f restricted-psp.yaml 3. Create a Deployment with a securityContext
4. Apply the Deployment: bash kubectl apply -f myapp-deploymentyaml Note: This configuration assumes that the 'restricted-psps is applied to your entire namespace. You can use a more granular approach by applying the PSP to specific pods or deployments.
NEW QUESTION # 48
You are working on a Kubernetes cluster that hosts a critical microservices application. You have identified that the application is vulnerable to a known attack vector through a specific service called "payment-service." You need to quickly implement a security measure to mitigate this attack vector while minimizing the impact on other services.
How can you use a network policy to isolate the "payment-service" from the rest of the cluster and prevent the attack without disrupting the normal functioning of other microservices?
Answer:
Explanation:
Solution (Step by Step) :
1. Identify the specific traffic flows:
- Analyze the network traffic of the "payment-service" to understand the communication patterns it uses.
- Determine which services are essential for the "payment-service" to operate correctly.
- Identify the specific ports and protocols used by the "payment-service" to communicate with those services.
2. Define the network policy:
- Create a network policy specifically for the "payment-service."
- Allow only the necessary traffic flows to and from the "payment-service."
- Block any other traffic, including potential attack vectors.
3. Deploy and test the policy:
- Apply the network policy to the cluster.
- Monitor the "payment-service" closely to ensure it continues to operate correctly.
- Test the policy with simulated attacks to confirm its effectiveness.
Example Network Policy:
This policy allows the "payment-service" to communicate only With "order-service" and "database" services while blocking all other traffic. This allows the service to continue operating normally while isolating it from the rest of the cluster and mitigating the potential attack vector.
NEW QUESTION # 49
SIMULATION
Context:
Cluster: prod
Master node: master1
Worker node: worker1
You can switch the cluster/configuration context using the following command:
[desk@cli] $ kubectl config use-context prod
Task:
Analyse and edit the given Dockerfile (based on the ubuntu:18:04 image)
/home/cert_masters/Dockerfile fixing two instructions present in the file being prominent security/best-practice issues.
Analyse and edit the given manifest file
/home/cert_masters/mydeployment.yaml fixing two fields present in the file being prominent security/best-practice issues.
Note: Don't add or remove configuration settings; only modify the existing configuration settings, so that two configuration settings each are no longer security/best-practice concerns.
Should you need an unprivileged user for any of the tasks, use user nobody with user id 65535
Answer:
Explanation:
See the Explanation belowExplanation:
1. For Dockerfile: Fix the image version & user name in Dockerfile
2. For mydeployment.yaml : Fix security contexts
Explanation:
[desk@cli] $ vim /home/cert_masters/Dockerfile
FROM ubuntu:latest # Remove this
FROM ubuntu:18.04 # Add this
USER root # Remove this
USER nobody # Add this
RUN apt get install -y lsof=4.72 wget=1.17.1 nginx=4.2
ENV ENVIRONMENT=testing
USER root # Remove this
USER nobody # Add this
CMD ["nginx -d"]
[desk@cli] $ vim /home/cert_masters/mydeployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: kafka
name: kafka
spec:
replicas: 1
selector:
matchLabels:
app: kafka
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: kafka
spec:
containers:
- image: bitnami/kafka
name: kafka
volumeMounts:
- name: kafka-vol
mountPath: /var/lib/kafka
securityContext:
{"capabilities":{"add":["NET_ADMIN"],"drop":["all"]},"privileged": True,"readOnlyRootFilesystem": False, "runAsUser": 65535} # Delete This
{"capabilities":{"add":["NET_ADMIN"],"drop":["all"]},"privileged": False,"readOnlyRootFilesystem": True, "runAsUser": 65535} # Add This resources: {} volumes:
- name: kafka-vol
emptyDir: {}
status: {}
Pictorial View:
[desk@cli] $ vim /home/cert_masters/mydeployment.yaml
NEW QUESTION # 50
......
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