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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Cluster Hardening | 15% | - Minimize admission of containers with capabilities assigned - Minimize admission of containers with hostPath volumes - Minimize admission of containers without AppArmor profile - Minimize admission of containers with sharing the host process namespace - Minimize admission of containers with sharing the host IPC namespace - Minimize admission of containers with added capabilities - Minimize admission of containers without seccomp profiles - Minimize admission of containers with allowPrivilegeEscalation - Minimize admission of containers that allow host namespaces - Minimize admission of containers with raw block devices - Minimize admission of containers with FlexVolume volumes - Minimize admission of privileged containers - Minimize admission of containers with sharing the host network namespace - Minimize admission of containers without a security context |
| Topic 2: Cluster Setup | 10% | - Use Cis benchmarks to check Kubernetes cluster settings - Configure TLS certificates and minimum version for etcd - Use Pod Security Policies to control security-related pod behaviors - Understand the security implications of embedding cloud provider flags - Use role-based access control (RBAC) to minimize exposure - Implement Pod-to-Pod encryption using mTLS or WireGuard - Manage sensitive information in clusters |
| Topic 3: Supply Chain Security | 20% | - Use image admission controllers to prevent use of untrusted images - Minimize base image footprint - Understand the software supply chain best practices - Understand image security scanning and its workflow - Use static analysis tools to detect vulnerabilities - Use distroless images for static workload - Sign container images and verify signatures - Understand the container build process |
| Topic 4: System Hardening | 15% | - Modify host components to improve security - Understand the concept of OPA (Open Policy Agent) and Gatekeeper - Enable audit logging - Kernel defaults and parameters using sysctl |
| Topic 5: Minimize Microservice Vulnerabilities | 20% | - Configure network policies for namespace isolation - Understand the principle of immutable containers - Use OPA Gatekeeper to enforce security controls - Use PSP to enforce security controls - Use AppArmor or seccomp profiles to constrain container behavior - Set appropriate security contexts for pods and containers |
| Topic 6: Monitoring, Logging, and Runtime Security | 20% | - Detect threats at the container level - Perform behavioral analytics to detect malicious activity - Understand and monitor network traffic - Falco - container security monitoring and threat detection - Minimize the attack surface using container health indicators - Audit and detect logs and events for anomalies |
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NEW QUESTION # 16
You are responsible for securing the Kubernetes clusters supply chain. You want to ensure that only images from trusted registries are allowed to be deployed to the cluster. How would you configure Kubernetes to restrict deployments to only images from specific registries?
Answer:
Explanation:
Solution (Step by Step) :
1. Create a Pod Security Policy (PSP):
- A PSP is a policy that enforces security restrictions on pods. You can define the allowed registries for image pulls within the PSP
- create a PSP YAML file:
2. Define Allowed Registries: - Within the 'spec' of your PSP, create a field 'seLinux' and then define the allowed registries within the 'seLinux' field. - Example:
3. Apply the PSP: - Apply the PSP to your cluster using 'kubectl apply -f restricted-registry-psp.yaml' 4. Create a Service Account: - Create a service account that will be allowed to run pods with this PSP:
5. Bind the PSP to the Service Account: - Add the 'securityContext' field to your deployment and specify the PSP you just created:
- Apply the deployment: bash kubectl apply -f deploymentyaml - Now, the deployment will only be able to pull images from the specified registry.
NEW QUESTION # 17
You are running a Kubernetes cluster with a deployment named "my-app" that uses a container image from a public registry. You suspect that a recent deployment update may have introduced a vulnerability in one of the containers. Explain how you would use a container security posture management (CSPM) tool like Aqua Security to identify and address this potential security risk.
Answer:
Explanation:
Solution (Step by Step) :
1. Deploy Aqua Security:
- Install and configure Aqua Security on your Kubernetes cluster. Aqua Security is a comprehensive CSPM solution that offers a wide range of container security features, including vulnerability scanning, runtime security, and policy enforcement
2 Enable Continuous Image Scanning:
- Configure Aqua Security to continuously scan container images stored in your private registry for vulnerabilities. You can set up policies to block images With specific vulnerabilities or those that fail to meet your security requirements.
3. Implement Runtime Security:
- Enable Aqua Security's runtime security capabilities to monitor running containers for suspicious activity. This includes:
- File Integrity Monitoring (FIM): Detect unauthorized changes to files within containers.
- Network Security: Monitor network connections and identify unauthorized or suspicious traffic.
- Process Monitoring: Detect and block unexpected processes launched within containers.
4. Define Security Policies:
- Create custom security policies in Aqua Security to enforce specific security rules and controls for your Kubernetes cluster. These policies can
define:
- Vulnerability Limits: Allow only containers with specific vulnerability levels to run.
- Network Access Controls: Restrict network connections from containers.
- Resource IJsage Limits: Limit the resources (CPU, memory) that containers can consume-
5. Investigate Security Alerts:
- Aqua Security will generate alerts when it detects potential security risks- Investigate these alerts to understand the root cause of the issue and take corrective actions.
6. Remediate Security Issues:
- Use Aqua Security's remediation capabilities to address vulnerabilities and security issues. This could involve updating container images, patching vulnerabilities, or implementing additional security controls.
7. Monitor and Report:
- Regularly review the security reports and dashboards provided by Aqua Security to track your container security posture- Stay informed about any potential threats and proactively address them.
NEW QUESTION # 18
You are a security engineer tasked with securing your organization's container registry. You need to ensure that only authorized users can push images to the registry, while other users can only pull them. Explain how you would implement this using RBAC in Kubernetes and provide a detailed configuration example.
Answer:
Explanation:
Solution (Step by Step) :
1. Create a Service Account for Registry Operations:
- Create a service account specifically for registry operations:
2. Create a Role for Registry Pushers: - Define a role that grants push access to the registry:
3. Create a RoleBinding to Associate the Role with the Service Account: - Bind the 'registry-pusher role to the 'registry-operator' service account:
- Apply the role binding definition: bash kubectl apply -f role-binding.yaml 4. Create a Role for Registry Pullers: - Define a role that grants pull access to the registry:
5. Create a RoleBinding to Associate the Role with Users/Service Accounts: - Bind the 'registry-puller role to the desired users or service accounts:
- Apply the role binding definitiom bash kubectl apply -f role-binding.yaml 6. Configure the Registry (Example with Harbor): - In your registry (e.g., Harbor), create project-level permissions and map them to the service accounts you created. This step might involve creating users and groups in Harbor and then associating them with the appropriate projects and roles. By following these steps, you can securely control access to your container registry, allowing only authorized users to push images and restricting others to pulling only.
NEW QUESTION # 19
You're in charge of enforcing a secure supply chain in your Kubernetes environment. You need to ensure that all container images deployed to your cluster are scanned for known vulnerabilities before being deployed. How would you achieve this?
Answer:
Explanation:
Solution (Step by Step) :
1. Choose a Vulnerability Scanner:
- Select a reputable container image vulnerability scanner. Popular options include:
- Aqua Security: A comprehensive platform that offers image scanning, runtime security, and policy enforcement.
- JFrog Xray: A vulnerability scanner that integrates with JFrog Artifactory, providing deep scanning capabilities.
- Ancnore Engine: An open-source scanner that can be deployed on-premises or in the Cloud.
2. Integrate with Your Registry (if applicable):
- If your vulnerability scanner support integration with your registry (e.g., Docker Hub, Harbor), configure it to scan images automatically as they are pushed.
- This approach provides real-time vulnerability scanning, ensuring that only secure images are available for deployment.
3. Implement a Scanning Pipeline (if needed):
- If your chosen scanner doesn't integrate with your registry, build a scanning pipeline using a CI/CD tool like Jenkins, GitLab Cl, or CircleCl.
- The pipeline should:
- Pull the image from the registry.
- Run the vulnerability scanner against the image.
- Fail the build if any critical vulnerabilities are found.
- If no critical vulnerabilities are found, push the scanned image to the registry with a tag indicating its scan status.
4. Configure Kubernetes Policies:
- Use Kubernetes policies (like Pod Security Policies or Admission Controllers) to enforce the following:
- Restrict deployments to images with a "scanned" tag: This ensures only images that have undergone vulnerability scanning are deployed.
- Block deployments of images with known critical vulnerabilities: This prevents deployment of images with unacceptable risks.
5. Monitor Scanning Results:
- Continuously monitor vulnerability scanning results.
- Keep track of vulnerabilities found and their severity.
- Update your policies to reflect changes in vulnerability scanning results.
6. Remediation and Patching:
- Have a process in place to remediate and patch vulnerabilities found in images.
- Work with developers and security teams to address vulnerabilities promptly.
NEW QUESTION # 20
Enable audit logs in the cluster, To Do so, enable the log backend, and ensure that
1. logs are stored at /var/log/kubernetes/kubernetes-logs.txt.
2. Log files are retained for 5 days.
3. at maximum, a number of 10 old audit logs files are retained.
Edit and extend the basic policy to log:
Answer: A
Explanation:
2. Log the request body of deployments changes in the namespace kube-system.
3. Log all other resources in core and extensions at the Request level.
4. Don't log watch requests by the "system:kube-proxy" on endpoints or
NEW QUESTION # 21
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