Dockle
Definition
Dockle is an open-source security auditing tool designed to analyze Docker images for vulnerabilities and misconfigurations. It evaluates Docker images against a set of best practices and security benchmarks, providing insights into potential security risks. Dockle checks for issues such as outdated packages, unnecessary privileges, and insecure configurations, helping developers and security teams enhance the security posture of their containerized applications.
Secure Settings Example
# Example of a secure Dockerfile configuration
FROM alpine:3.14
# Add a non-root user
RUN addgroup -S appgroup && adduser -S appuser -G appgroup
# Switch to non-root user
USER appuser
# Install necessary packages with no-cache
RUN apk --no-cache add curl
# Set a specific entrypoint
ENTRYPOINT ["./app"]
Insecure Settings Example
# Example of an insecure Dockerfile configuration
FROM alpine:3.14
# Install packages without cleaning up
RUN apk add curl
# Run as root user
USER root
# Use a generic entrypoint
ENTRYPOINT ["sh", "-c", "while :; do echo 'Running'; sleep 100; done"]