Missing Dnf Clean All

Query id: 295acb63-9246-4b21-b441-7c1f1fb62dc0
Query name: Missing Dnf Clean All
Platform: Dockerfile
Severity: Medium
Category: Supply-Chain
URL: Github

Description¶

Cached package data should be cleaned after installation to reduce image size
Documentation

Code samples¶

Code samples with security vulnerabilities¶

Postitive test num. 1 - dockerfile file

FROM fedora:27
RUN set -uex && \
    dnf config-manager --add-repo https://download.docker.com/linux/fedora/docker-ce.repo && \
    sed -i 's/\$releasever/26/g' /etc/yum.repos.d/docker-ce.repo && \
    dnf install -vy docker-ce
HEALTHCHECK CMD curl --fail http://localhost:3000 || exit 1

Code samples without security vulnerabilities¶

Negative test num. 1 - dockerfile file

FROM fedora:27
RUN set -uex && \
    dnf config-manager --add-repo https://download.docker.com/linux/fedora/docker-ce.repo && \
    sed -i 's/\$releasever/26/g' /etc/yum.repos.d/docker-ce.repo && \
    dnf install -vy docker-ce && \
    dnf clean all
HEALTHCHECK CMD curl --fail http://localhost:3000 || exit 1