Yum Clean All Missing

Query id: 00481784-25aa-4a55-8633-3136dfcf4f37
Query name: Yum Clean All Missing
Platform: Dockerfile
Severity: Medium
Category: Supply-Chain
URL: Github

Description¶

Need to use 'yum clean all' after using a 'yum install' command to clean package cached data and reduce image size
Documentation

Code samples¶

Code samples with security vulnerabilities¶

Postitive test num. 1 - dockerfile file

FROM alpine:3.5
RUN apk add --update py2-pip
RUN yum install
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"]

FROM alpine:3.4
RUN yum clean all \
    yum -y install

Code samples without security vulnerabilities¶

Negative test num. 1 - dockerfile file

FROM alpine:3.5
RUN apk add --update py2-pip
RUN yum install \
    yum clean all
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"]

FROM alpine:3.4
RUN yum -y install \
    yum clean all