A security team wants to catch insecure commands-such as adding root passwords or copying secrets-as early as possible in the CI/CD pipeline for new Docker images. Which assessment approach is most likely to expose these issues before the container is ever executed?
Capture live network traffic from the container and review external endpoints
Run dynamic application security testing (DAST) against the container after it starts
Launch an authenticated vulnerability scan against the deployed image in a staging cluster
Perform a static scan of the Dockerfile and its layered instructions during the build stage
Scanning the Dockerfile (or similar image-creation script) is a form of static container analysis. It inspects each build instruction and can reveal risky practices-hard-coded secrets, dangerous package managers, or commands that weaken runtime security-before the image is built or run. Dynamic techniques like DAST, traffic inspection, or authenticated scans operate after deployment, so they may miss design flaws embedded in the build file.
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What is an image creation file in the context of containers?
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Why is it important to analyze image creation files instead of just scanning during runtime?
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What tools are commonly used to scan container image creation files?