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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Monitoring, Logging and Runtime Security | 15% | - Audit logging and monitoring - Runtime threat detection |
| Topic 2: Minimizing Microservice Vulnerabilities | 20% | - Container isolation and security contexts - Pod security standards |
| Topic 3: System Hardening | 15% | - Host security controls - Kernel and node security configuration |
| Topic 4: Supply Chain Security | 20% | - Image scanning and verification - Secure CI/CD practices |
| Topic 5: Cluster Setup | 15% | - Hardening cluster components - Secure installation configuration |
| Topic 6: Cluster Hardening | 15% | - Authentication and authorization - API server security |
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NEW QUESTION # 47
SIMULATION
use the Trivy to scan the following images,
1. amazonlinux:1
2. k8s.gcr.io/kube-controller-manager:v1.18.6
Look for images with HIGH or CRITICAL severity vulnerabilities and store the output of the same in /opt/trivy-vulnerable.txt
Answer: A
NEW QUESTION # 48
SIMULATION
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 that the RotateKubeletServerCertificate argument is set to true.
b. Ensure that the admission control plugin PodSecurityPolicy is set.
c. Ensure that the --kubelet-certificate-authority argument is set as appropriate.
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
b. Ensure that the --peer-auto-tls argument is not set to true
Hint: Take the use of Tool Kube-Bench
Answer:
Explanation:
See the Explanation belowExplanation:
Fix all of the following violations that were found against the API server:- a. Ensure that the RotateKubeletServerCertificate argument is set to true.
apiVersion: v1
kind: Pod
metadata:
creationTimestamp: null
labels:
component: kubelet
tier: control-plane
name: kubelet
namespace: kube-system
spec:
containers:
- command:
- kube-controller-manager
+ - --feature-gates=RotateKubeletServerCertificate=true
image: gcr.io/google_containers/kubelet-amd64:v1.6.0
livenessProbe:
failureThreshold: 8
httpGet:
host: 127.0.0.1
path: /healthz
port: 6443
scheme: HTTPS
initialDelaySeconds: 15
timeoutSeconds: 15
name: kubelet
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
b. Ensure that the admission control plugin PodSecurityPolicy is set.
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests:
test_items:
- flag: "--enable-admission-plugins"
compare:
op: has
value: "PodSecurityPolicy"
set: true
remediation: |
Follow the documentation and create Pod Security Policy objects as per your environment.
Then, edit the API server pod specification file $apiserverconf
on the master node and set the --enable-admission-plugins parameter to a value that includes PodSecurityPolicy :
--enable-admission-plugins=...,PodSecurityPolicy,...
Then restart the API Server.
scored: true
c. Ensure that the --kubelet-certificate-authority argument is set as appropriate.
audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"
tests:
test_items:
- flag: "--kubelet-certificate-authority"
set: true
remediation: |
Follow the Kubernetes documentation and setup the TLS connection between the apiserver and kubelets. Then, edit the API server pod specification file
$apiserverconf on the master node and set the --kubelet-certificate-authority parameter to the path to the cert file for the certificate authority.
--kubelet-certificate-authority=<ca-string>
scored: true
Fix all of the following violations that were found against the ETCD:-
a. Ensure that the --auto-tls argument is not set to true
Edit the etcd pod specification file $etcdconf on the master
node and either remove the --auto-tls parameter or set it to false.
--auto-tls=false
b. Ensure that the --peer-auto-tls argument is not set to true
Edit the etcd pod specification file $etcdconf on the master
node and either remove the --peer-auto-tls parameter or set it to false.
--peer-auto-tls=false
NEW QUESTION # 49
SIMULATION
Context
A default-deny NetworkPolicy avoids to accidentally expose a Pod in a namespace that doesn't have any other NetworkPolicy defined.
Task
Create a new default-deny NetworkPolicy named defaultdeny in the namespace testing for all traffic of type Egress.
The new NetworkPolicy must deny all Egress traffic in the namespace testing.
Apply the newly created default-deny NetworkPolicy to all Pods running in namespace testing.
Answer:
Explanation:
See the Explanation below
Explanation:
NEW QUESTION # 50
You're tasked With securing a Kubernetes cluster for a sensitive application. The application utilizes a service account for accessing a database. However, due to legacy reasons, this service account has broad permissions, including 'read', 'write', and 'delete' access to all resources in the cluster. How would you mitigate this security risk while maintaining application functionality? Implement a solution that minimizes the permissions granted to the service account and adheres to the principle of least privilege.
Answer:
Explanation:
Solution (Step by Step) :
1. Create a new Role With restricted permissions:
- Define a Role that grants only the necessary permissions for the service account to interact with the database.
- The Role should have specific permissions for 'read' , 'write' , and 'delete' operations, but limited to the database resources used by the application.
2. Create a RoleBinding: - Bind the newly created Role to the service account. - This will grant the service account the specific permissions defined in the Role.
3. Update the Deployment - Update the Deployment configuration to use the new service account with restricted permissions.
4. Validate the Permissions: - Verity that the application still functions correctly with the restricted permissions. - Use 'kubectl auth can-i --list --as=your-service-account' to confirm the available permissions for the service account. 5. Revoke the Legacy Service Account: - Once the application is running with the new service account, revoke the old service account with broad permissions.
NEW QUESTION # 51
You are managing a Kubernetes cluster where you have a critical microservice called "order-processing" running in a Deployment. The service interacts with a sensitive database containing customer order information. You are concerned about the potential risk of attackers gaining access to the database credentials. How would you implement a strategy using AppArmor profiles to mitigate this risk?
Answer:
Explanation:
Solution (Step by Step) :
1. Create an AppArmor Profile: Create a profile that specifically restricts the "order-processing" containers access to the database credentials. You
can do this by using tne 'apparmor' command-line utility.
basn
# Create an AppArmor profile for the order-processing container
sudo aa-genprof Ipath/to/order-processing/container
- The 'aa-genpror command will generate a basic profile based on the containers file system.
- You can then edit the profile to restrict access to specific files or directories.
2. Restrict Access to Credentials: Edit the generated profile and add rules to deny access to the database credentials file. For example, if the
database credentials are stored in a file named 'db_credentials-txt' at '/etc/secretsr , you would add the following line to the profile:
letc/secrets/db credentials-txt r,
- This line restricts the container from reading (r) the 'db_credentials.txt' file.
- You can also use more specific path restrictions if needed.
3. Apply tne AppArmor Profile:
- Load the profile:
bash
sudo apparmor_parser -r
- Stan or restart the container:
bash
kubectl rollout restart deployment/order-processing
- This will ensure the new AppArmor profile is loaded and applied to the "order-processing" container.
4. Test and Verify'
- Test the application: Make sure the "order-processing" service can still access the database and perform its operations.
- Check for errors: Monitor the logs ot the "order-processing" container for any errors related to AppArmor. If the container can't access the credentials file, you will see errors in the logs.
5. Monitor and Update:
- Monitor the containers AppArmor logs to identify any potential vulnerabilities or inconsistencies.
- Update the profile as needed to adjust permissions and maintain security.
NEW QUESTION # 52
......
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