Gem Install Without Version

• Query id: 22cd11f7-9c6c-4f6e-84c0-02058120b341
• Query name: Gem Install Without Version
• Platform: Dockerfile
• Severity: Medium
• Category: Supply-Chain
• URL: Github

Description

Instead of 'gem install ' we should use 'gem install :'
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 gem install bundler
RUN ["gem", "install", "blunder"]
RUN gem install grpc -v ${GRPC_RUBY_VERSION} blunder
RUN bundle 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"]

Code samples without security vulnerabilities

Negative test num. 1 - dockerfile file

FROM alpine:3.5
RUN apk add --update py2-pip
RUN gem install bundler:2.0.2
RUN bundle 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"]
ENV GRPC_VERSION 1.0.0
RUN gem install grpc -v ${GRPC_RUBY_VERSION}
RUN gem install grpc:${GRPC_VERSION} grpc-tools:${GRPC_VERSION}