A penetration tester is getting ready to conduct a vulnerability scan to evaluate an environment that consists of a container orchestration cluster. Which of the following tools would be best to use for this purpose?
In a container orchestration environment (for example, Kubernetes), the most valuable vulnerability scanning capability is one that understands container images, packages, and misconfigurations that commonly occur in containerized workloads. Trivy is specifically designed for container security assessment: it scans container images and the underlying OS/application dependencies for known vulnerabilities and can also identify misconfigurations relevant to cloud-native deployments. This aligns closely with PenTest+ guidance that testers should choose tools that match the technology stack being assessed—container ecosystems require image- and dependency-aware scanning rather than only traditional host/service scanning.
NSE (Nmap Scripting Engine) is excellent for network discovery and service enumeration, but it does not provide comprehensive container image vulnerability coverage. Nessus is a general-purpose vulnerability scanner and can be useful for hosts, but it is not as directly focused on container image supply chain issues and cluster workload artifacts as a dedicated container scanner. CrackMapExec (CME) is aimed at Windows/AD enumeration and lateral movement, not container vulnerability scanning. Therefore, Trivy is the best fit for scanning a container orchestration cluster environment.
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