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Hardening Docker containers for production involves applying security best practices aligned with CIS Docker Benchmark v1.8.0 to minimize attack surface, prevent privilege escalation, and enforce leas
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インストールを決める前に、SKILL.md と SkillsMP に表示されている付属ファイルをお読みください。
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
直接コマンドでは確認用 Prompt が省略されます。実行前にソースを確認してください。
npx skills add https://github.com/xalgord/xalgorix --skill hardening-docker-containers-for-productionコマンドは1行のまま表示されます。コピー前に横へスクロールして全体を確認してください。
ローカルで確認しますか？SkillsMP が現在取得できるファイルをダウンロードできます。
Detecting and exploiting HTTP request smuggling vulnerabilities caused by Content-Length and Transfer-Encoding parsing discrepancies between front-end and back-end servers.
Identifying and exploiting OAuth 2.0 and OpenID Connect misconfigurations including redirect URI manipulation, token leakage, and authorization code theft during security assessments.
Identifying and exploiting dangling DNS records pointing to unclaimed cloud services, enabling subdomain takeover for phishing, cookie stealing, and authentication bypass during authorized penetration tests.
SOC 職業分類に基づく
SKILL.md を表示中
| name | hardening-docker-containers-for-production |
| description | Hardening Docker containers for production involves applying security best practices aligned with CIS Docker Benchmark v1.8.0 to minimize attack surface, prevent privilege escalation, and enforce leas |
| domain | cybersecurity |
| subdomain | container-security |
| tags | ["containers","docker","security","hardening","CIS-benchmark"] |
| version | 1.0 |
| author | mahipal |
| license | Apache-2.0 |
| nist_csf | ["PR.PS-01","PR.IR-01","ID.AM-08","DE.CM-01"] |
Hardening Docker containers for production involves applying security best practices aligned with CIS Docker Benchmark v1.8.0 to minimize attack surface, prevent privilege escalation, and enforce least-privilege principles across Docker daemon, images, containers, and runtime configurations.
"hosts": ["tcp://0.0.0.0:2376"] with tlsverify missing/false is remote root. Verify: ss -tlnp | grep -E '2375|2376' and confirm docker info shows TLS enabled; 2375 (plaintext) should never listen.-v /var/run/docker.sock:/var/run/docker.sock hands the container host control. Verify: docker inspect <id> --format '{{.Mounts}}'.--cap-drop ALL --cap-add SYS_ADMIN (or NET_ADMIN) reintroduces escape primitives. Verify: docker inspect --format '{{.HostConfig.CapAdd}}'.USER overridden at runtime: a non-root Dockerfile USER 65534 is negated by docker run --user 0. Verify: docker inspect --format '{{.Config.User}}' and docker exec <id> id.--read-only but a --tmpfs /tmp lacking noexec,nosuid still allows dropped-binary execution.no-new-privileges absent: confirm --security-opt no-new-privileges:true or daemon "no-new-privileges": true; check docker inspect --format '{{.HostConfig.SecurityOpt}}'.docker/docker-bench-security and treat any [WARN] on sections 2 (daemon), 4 (images), and 5 (runtime) as actionable; and for the image/Dockerfile.docklehadolint# Use specific digest for reproducibility
FROM python:3.12-slim@sha256:abc123... AS builder
WORKDIR /app
COPY requirements.txt .
RUN pip install --no-cache-dir --user -r requirements.txt
# Production stage - minimal image
FROM gcr.io/distroless/python3-debian12
# Copy only necessary artifacts
COPY --from=builder /root/.local /root/.local
COPY --from=builder /app /app
WORKDIR /app
# Create non-root user
USER 65534:65534
# Set read-only filesystem expectation
LABEL org.opencontainers.image.source="https://github.com/org/app"
ENTRYPOINT ["python", "app.py"]
{
"icc": false,
"log-driver": "json-file",
"log-opts": {
"max-size": "10m",
"max-file": "3"
},
"live-restore": true,
"userland-proxy": false,
"no-new-privileges": true,
"default-ulimits": {
"nofile": {
"Name": "nofile",
"Hard": 64000,
"Soft": 64000
},
"nproc": {
"Name": "nproc",
"Hard": 1024,
"Soft": 1024
}
},
"seccomp-profile": "/etc/docker/seccomp-default.json",
"tls": true,
"tlscacert": "/etc/docker/tls/ca.pem",
"tlscert": "/etc/docker/tls/server-cert.pem",
"tlskey": "/etc/docker/tls/server-key.pem",
"tlsverify": true
}
docker run -d \
--name production-app \
--read-only \
--tmpfs /tmp:rw,noexec,nosuid,size=100m \
--tmpfs /var/run:rw,noexec,nosuid,size=10m \
--cap-drop ALL \
--cap-add NET_BIND_SERVICE \
--security-opt no-new-privileges:true \
--security-opt seccomp=/etc/docker/seccomp-default.json \
--security-opt apparmor=docker-default \
--pids-limit 100 \
--memory 512m \
--memory-swap 512m \
--cpus 1.0 \
--user 65534:65534 \
--network custom-bridge \
--restart on-failure:3 \
--health-cmd "curl -f http://localhost:8080/health || exit 1" \
--health-interval 30s \
--health-timeout 10s \
--health-retries 3 \
myapp:latest
export DOCKER_CONTENT_TRUST=1
export DOCKER_CONTENT_TRUST_SERVER=https://notary.example.com
# Sign and push image
docker trust sign myregistry.com/myapp:v1.0.0
# Verify image signature before pull
docker trust inspect --pretty myregistry.com/myapp:v1.0.0
# Add audit rules for Docker files and directories
cat >> /etc/audit/rules.d/docker.rules << 'EOF'
-w /usr/bin/docker -k docker
-w /var/lib/docker -k docker
-w /etc/docker -k docker
-w /lib/systemd/system/docker.service -k docker
-w /lib/systemd/system/docker.socket -k docker
-w /etc/default/docker -k docker
-w /etc/docker/daemon.json -k docker
-w /usr/bin/containerd -k docker
-w /usr/bin/runc -k docker
EOF
systemctl restart auditd
# Run Docker Bench Security
docker run --rm --net host --pid host \
--userns host --cap-add audit_control \
-e DOCKER_CONTENT_TRUST=$DOCKER_CONTENT_TRUST \
-v /etc:/etc:ro \
-v /usr/bin/containerd:/usr/bin/containerd:ro \
-v /usr/bin/runc:/usr/bin/runc:ro \
-v /usr/lib/systemd:/usr/lib/systemd:ro \
-v /var/lib:/var/lib:ro \
-v /var/run/docker.sock:/var/run/docker.sock:ro \
docker/docker-bench-security
# Lint Dockerfile
hadolint Dockerfile
# Lint built image
dockle myapp:latest
# Verify no containers running as root
docker ps -q | xargs docker inspect --format '{{.Id}}: User={{.Config.User}}'
| Control | Implementation | CIS Section |
|---|---|---|
| Non-root user | USER instruction in Dockerfile | 4.1 |
| Read-only rootfs | --read-only flag | 5.12 |
| Drop capabilities | --cap-drop ALL | 5.3 |
| Resource limits | --memory, --cpus, --pids-limit | 5.10 |
| No new privileges | --security-opt no-new-privileges | 5.25 |
| Content trust | DOCKER_CONTENT_TRUST=1 | 4.5 |
| TLS for daemon | daemon.json TLS config | 2.6 |
| Audit logging | auditd rules | 1.1 |