securing-container-registry-images

name	securing-container-registry-images
description	Securing container registry images by implementing vulnerability scanning with Trivy and Grype, enforcing image signing with Cosign and Sigstore, configuring registry access controls, and building CI/CD pipelines that prevent deploying unscanned or unsigned images. . Use when working with securing container registry images.
domain	cybersecurity
tags	["cloud-security","containers","registry","image-scanning","trivy","cosign","supply-chain"]
subdomain	cloud-security
version	1.0
author	oyi77
license	Apache-2.0
nist_csf	["PR.IR-01","ID.AM-08","GV.SC-06","DE.CM-01"]

Securing Container Registry Images

Overview

Cybersecurity skill for securing container registry images. Follows industry best practices and security standards.

When to Use

Trigger phrases:

• "securing container registry images"

• "Securing container registry images by implementing vulnerability scanning with T"

• When establishing security controls for container image registries (ECR, ACR, GCR, Docker Hub)

• When building CI/CD pipelines that enforce vulnerability scanning before image promotion

• When implementing image signing and verification to prevent supply chain attacks

• When auditing existing registries for vulnerable, unscanned, or unsigned images

• When compliance requires software bill of materials (SBOM) for deployed container images

Do not use for runtime container security (use Falco or Sysdig), for Kubernetes admission control (use OPA Gatekeeper or Kyverno after establishing registry controls), or for host-level vulnerability scanning (use Amazon Inspector or Qualys).

When NOT to Use

• When you lack proper authorization for testing
• For production systems without change management
• When the task requires legal or compliance expertise beyond technical scope

Prerequisites

• Trivy installed (brew install trivy or apt install trivy)
• Grype installed (curl -sSfL https://raw.githubusercontent.com/anchore/grype/main/install.sh | sh)
• Cosign installed for image signing (go install github.com/sigstore/cosign/v2/cmd/cosign@latest)
• Syft installed for SBOM generation (curl -sSfL https://raw.githubusercontent.com/anchore/syft/main/install.sh | sh)
• Container registry access (ECR, ACR, GCR, or private registry)

Workflow

# Example: IOC detection
import re

IOC_PATTERNS = {
    "ip": r"\b(?:\d{1,3}\.){3}\d{1,3}\b",
    "domain": r"\b[a-z0-9-]+\.[a-z]{2,}\b",
    "hash_md5": r"\b[a-f0-9]{32}\b",
    "hash_sha256": ,
}

 () -> :
     {k: re.findall(v, text)  k, v  IOC_PATTERNS.items()}