Image Version Using 'latest'

• Query id: f45ea400-6bbe-4501-9fc7-1c3d75c32067
• Query name: Image Version Using 'latest'
• Platform: Dockerfile
• Severity: Medium
• Category: Best Practices
• URL: Github

Description

When building images, always tag them with useful tags which codify version information, intended destination (prod or test, for instance), stability, or other information that is useful when deploying the application in different environments. Do not rely on the automatically-created latest tag
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - dockerfile file

FROM alpine:latest
RUN apk add --update py2-pip
RUN pip install --upgrade pip
COPY requirements.txt /usr/src/app/
RUN pip install --no-cache-dir -r /usr/src/app/requirements.txt
COPY app.py /usr/src/app/
COPY templates/index.html /usr/src/app/templates/
EXPOSE 5000
CMD ["python", "/usr/src/app/app.py"]

Code samples without security vulnerabilities

Negative test num. 1 - dockerfile file

FROM alpine:3.5
RUN apk add --update py2-pip
RUN pip install --upgrade pip
COPY requirements.txt /usr/src/app/
RUN pip install --no-cache-dir -r /usr/src/app/requirements.txt
COPY app.py /usr/src/app/
COPY templates/index.html /usr/src/app/templates/
EXPOSE 5000
CMD ["python", "/usr/src/app/app.py"]