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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Cluster Hardening | 15% | - RBAC configuration - API access restriction - Component updates & vulnerability mitigation - Service account security |
| Topic 2: System Hardening | 10% | - Least privilege IAM - Kernel hardening (AppArmor, seccomp) - Network access control - Minimize OS attack surface |
| Topic 3: Cluster Setup | 15% | - Network security policies - CIS benchmark compliance - Binary verification - Secure Ingress configuration - Node metadata protection |
| Topic 4: Minimize Microservice Vulnerabilities | 20% | - Security contexts - Pod Security Standards - OPA/Gatekeeper implementation - Secret management - Isolation & multi-tenancy |
| Topic 5: Supply Chain Security | 20% | - Permitted registries - Image security & scanning - SBOM & CI/CD security - Static analysis tools - Signed artifacts & verification |
| Topic 6: Monitoring, Logging and Runtime Security | 20% | - Container immutability - Incident investigation - Threat detection (Falco) - Audit log configuration - Behavioral analytics |
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NEW QUESTION # 41
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 # 42
SIMULATION
You can switch the cluster/configuration context using the following command:
[desk@cli] $ kubectl config use-context stage
Context:
A PodSecurityPolicy shall prevent the creation of privileged Pods in a specific namespace.
Task:
1. Create a new PodSecurityPolcy named deny-policy, which prevents the creation of privileged Pods.
2. Create a new ClusterRole name deny-access-role, which uses the newly created PodSecurityPolicy deny-policy.
3. Create a new ServiceAccount named psd-denial-sa in the existing namespace development.
Finally, create a new ClusterRoleBindind named restrict-access-bind, which binds the newly created ClusterRole deny-access-role to the newly created ServiceAccount psp-denial-sa
Answer:
Explanation:
See the Explanation belowExplanation:
Create psp to disallow privileged container
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: deny-access-role
rules:
- apiGroups: ['policy']
resources: ['podsecuritypolicies']
verbs: ['use']
resourceNames:
- "deny-policy"
k create sa psp-denial-sa -n development
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: restrict-access-bing
roleRef:
kind: ClusterRole
name: deny-access-role
apiGroup: rbac.authorization.k8s.io
subjects:
- kind: ServiceAccount
name: psp-denial-sa
namespace: development
Explanation:
master1 $ vim psp.yaml
apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
name: deny-policy
spec:
privileged: false # Don't allow privileged pods!
seLinux:
rule: RunAsAny
supplementalGroups:
rule: RunAsAny
runAsUser:
rule: RunAsAny
fsGroup:
rule: RunAsAny
volumes:
- '*'
master1 $ vim cr1.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: deny-access-role
rules:
- apiGroups: ['policy']
resources: ['podsecuritypolicies']
verbs: ['use']
resourceNames:
- "deny-policy"
master1 $ k create sa psp-denial-sa -n development
master1 $ vim cb1.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: restrict-access-bing
roleRef:
kind: ClusterRole
name: deny-access-role
apiGroup: rbac.authorization.k8s.io
subjects:
# Authorize specific service accounts:
- kind: ServiceAccount
name: psp-denial-sa
namespace: development
master1 $ k apply -f psp.yaml
master1 $ k apply -f cr1.yaml
master1 $ k apply -f cb1.yaml
NEW QUESTION # 43
SIMULATION
Create a network policy named allow-np, that allows pod in the namespace staging to connect to port 80 of other pods in the same namespace.
Ensure that Network Policy:-
1. Does not allow access to pod not listening on port 80.
2. Does not allow access from Pods, not in namespace staging.
Answer:
Explanation:
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: network-policy
spec:
podSelector: {} #selects all the pods in the namespace deployed
policyTypes:
- Ingress
ingress:
- ports: #in input traffic allowed only through 80 port only
- protocol: TCP
port: 80
NEW QUESTION # 44
You have a multi-tenant Kubernetes cluster where each tenant has its own namespace. You need to configure security policies to ensure that:
- Pods in namespace 'tenant-a' cannot access any resources in namespace 'tenant-b'
- Pods in namespace 'tenant-b' can access resources in namespace 'tenant-a' only if they have a label 'tier:gold'.
Answer:
Explanation:
Solution (Step by Step) :
1. Create NetworkPoIicy for 'tenant-a'.
2. Create NetworkP01iCY for 'tenant-b':
3. Apply the policies: bash kubectl apply -f tenant-a-policy.yaml kubectl apply -f tenant-b-policy.yaml
NEW QUESTION # 45
SIMULATION
Using the runtime detection tool Falco, Analyse the container behavior for at least 20 seconds, using filters that detect newly spawning and executing processes in a single container of Nginx.
store the incident file art /opt/falco-incident.txt, containing the detected incidents. one per line, in the format
[timestamp],[uid],[processName]
Answer:
Explanation:
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NEW QUESTION # 46
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