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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Monitoring, Logging, and Runtime Security | 20% | - Perform behavioral analytics to detect malicious activity - Falco - container security monitoring and threat detection - Audit and detect logs and events for anomalies - Minimize the attack surface using container health indicators - Detect threats at the container level - Understand and monitor network traffic |
| Topic 2: Cluster Setup | 10% | - Use Cis benchmarks to check Kubernetes cluster settings - Implement Pod-to-Pod encryption using mTLS or WireGuard - Manage sensitive information in clusters - Understand the security implications of embedding cloud provider flags - Use role-based access control (RBAC) to minimize exposure - Use Pod Security Policies to control security-related pod behaviors - Configure TLS certificates and minimum version for etcd |
| Topic 3: Minimize Microservice Vulnerabilities | 20% | - Use PSP to enforce security controls - Use OPA Gatekeeper to enforce security controls - Set appropriate security contexts for pods and containers - Understand the principle of immutable containers - Use AppArmor or seccomp profiles to constrain container behavior - Configure network policies for namespace isolation |
| Topic 4: Cluster Hardening | 15% | - Minimize admission of containers without seccomp profiles - Minimize admission of containers with sharing the host IPC namespace - Minimize admission of containers with sharing the host network namespace - Minimize admission of containers with FlexVolume volumes - Minimize admission of containers without a security context - Minimize admission of containers with raw block devices - Minimize admission of containers that allow host namespaces - Minimize admission of privileged containers - Minimize admission of containers with hostPath volumes - Minimize admission of containers without AppArmor profile - Minimize admission of containers with allowPrivilegeEscalation - Minimize admission of containers with sharing the host process namespace - Minimize admission of containers with added capabilities - Minimize admission of containers with capabilities assigned |
| Topic 5: System Hardening | 15% | - Modify host components to improve security - Kernel defaults and parameters using sysctl - Understand the concept of OPA (Open Policy Agent) and Gatekeeper - Enable audit logging |
| Topic 6: Supply Chain Security | 20% | - Use distroless images for static workload - Understand the software supply chain best practices - Understand image security scanning and its workflow - Use static analysis tools to detect vulnerabilities - Understand the container build process - Use image admission controllers to prevent use of untrusted images - Minimize base image footprint - Sign container images and verify signatures |
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問題 #41
Context
A container image scanner is set up on the cluster, but it's not yet fully integrated into the cluster s configuration. When complete, the container image scanner shall scan for and reject the use of vulnerable images.
Task
Given an incomplete configuration in directory /etc/kubernetes/epconfig and a functional container image scanner with HTTPS endpoint https://wakanda.local:8081 /image_policy :
1. Enable the necessary plugins to create an image policy
2. Validate the control configuration and change it to an implicit deny
3. Edit the configuration to point to the provided HTTPS endpoint correctly Finally, test if the configuration is working by trying to deploy the vulnerable resource /root/KSSC00202/vulnerable-resource.yml.
答案：
解題說明：
問題 #42
You are running a critical application in a Kubernetes cluster. You need to implement a solution to detect and respond to potential security threats within your application containers. Specifically, you want to monitor for unauthorized file system modifications, suspicious network connections, and unusual process behavior. How would you design and implement a container security solution using tools like Falco, AppArmor, and Kubernetes Admission Controllers to achieve these objectives?
答案：
解題說明：
Solution (Step by Step):
1. Install and Configure Falco:
- Install Falco using the official Helm charts:
bash
helm repo add falco httpsflfalco.org/charts
helm install falco falco/falco
- Customize the Falco rules to detect specific threats:
2. Configure AppArmor: - Create a custom AppArmor profile for your application container: # Create a new AppArmor profile sudo nano /etc/apparmor.d/your-app-profile - Configure the profile to restrict file system access, network connections, and process execution:
- Load and enable the AppArmor profile: bash sudo apparmor_parser -r letc./apparmor.d/your-app-profile sudo systemctl restart apparmor 3. Implement Kubernetes Admission Controllers: - Use Kubernetes Admission Controllers to enforce container security policies at pod creation time: - Define a custom Admission Webhook to check for vulnerabilities:
- Create a Deployment to run the Admission Controller
4. Integrate and Monitor: - Integrate the Falco rules, AppArmor profile, and Kubernetes Admission Controllers within your Kubernetes Cluster - Monitor Falco alerts, AppArmor logs, and Kubernetes events to identify and investigate potential threats. This solution provides a comprehensive approach to container security, allowing you to detect and respond to threats proactively.
問題 #43
You are responsible for securing a Kubernetes cluster that runs multiple applications. You need to implement a solution that performs static analysis of the container images used in the cluster to identify potential vulnerabilities.
答案：
解題說明：
Solution (Step by Step):
1. Choose a vulnerability scanning tool: There are many open-source and commercial tools available, such as Trivy, Anchore, and Clair-
2. Deploy the scanning tool in your cluster: This can be done by deploying the tool as a DaemonSet, so that it runs on every node, or by using a dedicated scanning service.
3. Configure the scanning tool to scan all container images in the cluster: This can be done by configuring the tool to scan images in your container registry or by scanning images as they are deployed.
4. Integrate the scanning tool with your CI/CD pipeline: This will allow you to scan images before they are deployed to the cluster.
5. Review and address any vulnerabilities identified by the scanning tool: Analyze the output of the scanning tool and take appropriate action to remediate any identified vulnerabilities.
問題 #44
SIMULATION
A container image scanner is set up on the cluster.
Given an incomplete configuration in the directory
/etc/kubernetes/confcontrol and a functional container image scanner with HTTPS endpoint https://test-server.local.8081/image_policy
1. Enable the admission plugin.
2. Validate the control configuration and change it to implicit deny.
Finally, test the configuration by deploying the pod having the image tag as latest.
答案：A
問題 #45
You are tasked with securing a Kubernetes cluster that runs a critical web application. The cluster iS deployed on AWS and uses a custom API server for authentication You are required to implement a security strategy that enforces strong authentication and authorization for accessing the Kubernetes API, while also minimizing the attack surface.
答案：
解題說明：
Solution (Step by Step) :
1. configure RBAC:
- Define fine-grained Role-Based Access Control (RBAC) rules to restrict access to specific resources and actions based on user roles and permissions.
- Create roles and role bindings for different user groups, such as developers, operators, and security auditors.
- Example:
2. Enable TLS and Mutual TLS: - Configure the Kubernetes API server to use TLS for secure communication between the server and clients. - Implement Mutual TLS (mTLS) to enforce authentication for all API requests. - Example:
3. Configure API Server Authentication - Implement custom authentication mechanisms using plugins or external services to authenticate API requests. - Example:
4. Limit Access to Kubernetes API: - Configure network policies to restrict access to the Kubernetes API server from unauthorized sources. - Example:
5. Monitor and Audit API Activity: - Use audit logs to track API requests and identify potential security threats. - Example:
6. Use Security Best Practices: - Implement CIS Kubernetes Benchmark guidelines for configuring the Kubernetes cluster securely. - Example: - Enable strong password policies for all user accounts. - Restrict access to sensitive configuration files. - Regularly update the Kubernetes cluster and its components. 7. Implement a Secure Container Image Policy: - Implement a strict container image policy to ensure that only trusted images are deployed in the cluster. - Example: - Scan container images for vulnerabilities. - Require images to be signed by trusted parties. - Configure image signature verificatiom 8. Secure Kubernetes Secrets and Configuration: - Store sensitive data, such as passwords and API keys, in secrets. - Use secret management tools to securely access and rotate secrets. - Example: - Use Kubernetes Secrets to store credentials. - Implement a secret rotation policy. 9. Use Security Monitoring and Threat Detection Tools: - Deploy security monitoring and threat detection tools to identifry and respond to security incidents. - Example: - Integrate with a SIEM solution. - Use security tools like Falco to monitor for malicious activities. - Implement a security automation and response framework. 10. Regularly Review and Update Security Configuration: - Conduct periodic security audits and reviews to assess the effectiveness of security controls. - Keep security policies and procedures updated to address evolving threats. By implementing these security best practices, you can create a secure and resilient Kubernetes cluster for your critical web application.
問題 #46
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