| name | scanning-kubernetes-manifests-with-kubesec |
| description | Perform security risk analysis on Kubernetes resource manifests using Kubesec to identify misconfigurations, privilege escalation risks, and deviations from security best practices. |
| domain | cybersecurity |
| subdomain | container-security |
| tags | ["kubesec","kubernetes","manifest-scanning","security-scanning","devsecops","misconfiguration","static-analysis","ci-cd"] |
| version | 1.0 |
| author | mahipal |
| license | Apache-2.0 |
| nist_csf | ["PR.PS-01","PR.IR-01","ID.AM-08","DE.CM-01"] |
| mitre_attack | ["T1610","T1611","T1609","T1525","T1068"] |
| source | https://github.com/mukul975/Anthropic-Cybersecurity-Skills |
| source_commit | 04450304b12645cb2b974ab96d28c0664758a88d |
| note | Vendored verbatim from an external Apache-2.0 security-skill library, pinned by commit. Exceeds the internal 300-line skill guideline (agent-code-constraints.md) -- kept as-is because this is vendored reference material (forensics/threat-intel procedure), not Yana AI-authored content, and trimming would damage technical accuracy. |
Scanning Kubernetes Manifests with Kubesec
Overview
Kubesec is an open-source security risk analysis tool developed by ControlPlane that inspects Kubernetes resource manifests for common exploitable risks such as privilege escalation, writable host mounts, and excessive capabilities. It assigns a numerical security score to each resource and provides actionable recommendations for hardening. Kubesec can be used as a CLI binary, Docker container, kubectl plugin, admission webhook, or REST API endpoint.
When to Use
- When conducting security assessments that involve scanning kubernetes manifests with kubesec
- When following incident response procedures for related security events
- When performing scheduled security testing or auditing activities
- When validating security controls through hands-on testing
Prerequisites
- Kubernetes manifest files (YAML/JSON) for Deployments, Pods, DaemonSets, StatefulSets
- Docker or Go runtime for local installation
- kubectl access for scanning live cluster resources
- CI/CD pipeline access for automated scanning integration
Core Concepts
Security Scoring System
Kubesec assigns a score to each Kubernetes resource based on security checks:
- Positive scores: Awarded for security-enhancing configurations (readOnlyRootFilesystem, runAsNonRoot)
- Zero or negative scores: Indicate missing security controls or dangerous configurations
- Critical advisories: Flagged configurations that represent immediate security risks
Check Categories
- Privilege Controls: Checks for privileged containers, host PID/network access, root execution
- Capabilities: Identifies excessive Linux capabilities (SYS_ADMIN, NET_RAW)
- Volume Mounts: Detects dangerous host path mounts and writable sensitive paths
- Resource Limits: Validates presence of CPU/memory resource constraints
- Security Context: Verifies seccomp profiles, AppArmor annotations, SELinux contexts
Installation
Binary Installation
curl -sSL https://github.com/controlplaneio/kubesec/releases/latest/download/kubesec_linux_amd64.tar.gz | \
tar xz -C /usr/local/bin/ kubesec
kubesec version
Docker Installation
