WORKDIR Path Not Absolute

• Query id: 6b376af8-cfe8-49ab-a08d-f32de23661a4
• Query name: WORKDIR Path Not Absolute
• Platform: Dockerfile
• Severity: High
• Category: Build Process
• URL: Github

Description

For clarity and reliability, you should always use absolute paths for your WORKDIR
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - dockerfile file

FROM alpine:3.5
RUN apk add --update py2-pip
RUN pip install --upgrade pip
WORKDIR /path/to/workdir
WORKDIR workdir
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
WORKDIR /path/to/workdir
WORKDIR "/path/to/workdir"
WORKDIR /
WORKDIR c:\\windows
ENV DIRPATH=/path
ENV GLASSFISH_ARCHIVE glassfish5
WORKDIR $DIRPATH/$DIRNAME
WORKDIR ${GLASSFISH_HOME}/bin
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"]