Container Security (CIS Benchmarks, Runtime Security)

Container security encompasses the security of container images (the static artifact), container registries (the distribution layer), container runtime environments (the execution layer), and the host operating system kernel shared across containers. The Center for Internet Security (CIS) publishes Docker and container runtime benchmarks that specify hardening requirements across all layers, and these benchmarks are referenced by PCI DSS, HIPAA technical safeguards guidance, and FedRAMP container guidance. Key CIS controls include running containers as non-root users, using read-only root filesystems, dropping all Linux capabilities except those explicitly required, preventing privilege escalation, and limiting container resource consumption. Image security requires base image hygiene — minimal base images, no unnecessary packages, and regular vulnerability scanning.

Engineering a compliant container security program requires integrating security controls at every stage of the container lifecycle. In the build phase, Dockerfile linting tools enforce image construction best practices, and vulnerability scanners (Trivy, Grype, Snyk) must gate image promotion on vulnerability severity thresholds aligned to compliance requirements. Images must be signed using Cosign and the signatures stored in an OCI registry alongside the image manifest. Registry policies must enforce that only signed, scanned images from approved base images can be pulled into production. At runtime, seccomp profiles and AppArmor/SELinux policies restrict the system calls available to container processes, and admission controllers (OPA Gatekeeper, Kyverno) enforce security policies before pods are scheduled.

Runtime security monitoring introduces behavioral detection that complements static scanning. Tools like Falco detect anomalous runtime behavior — unexpected network connections, privilege escalation attempts, file system writes to unexpected paths — that may indicate container compromise. For regulated environments, these runtime security events must feed into SIEM systems and generate alerts that meet incident detection and response timeline requirements. Container forensics is an often-overlooked compliance requirement: when a security incident occurs in a containerized environment, the ephemeral nature of containers can destroy forensic evidence unless logging and audit infrastructure captures container lifecycle events, process execution, and network activity before the container terminates.

We implement defense-in-depth container security programs spanning image hardening against CIS benchmarks, signed image pipeline enforcement, admission controller policy libraries, and runtime behavioral monitoring integrated with SIEM platforms. Our vulnerability management workflows include compliance-mapped severity thresholds that satisfy PCI DSS, FedRAMP, and HIPAA scanning requirements.

Compliance-Native Architecture Guide

Design principles and a structured checklist for building software that is compliant by default — not compliant by retrofit. Covers data architecture, access controls, audit trails, and vendor due diligence.