Curl or Wget Instead of Add

Query id: 4b410d24-1cbe-4430-a632-62c9a931cf1c
Query name: Curl or Wget Instead of Add
Platform: Dockerfile
Severity: Low
Category: Best Practices
URL: Github

Description¶

Use of Curl or Wget should be done instead of Add to fetch packages from remote URLs due to the use of Add being strongly discouraged
Documentation

Code samples¶

Code samples with security vulnerabilities¶

Positive test num. 1 - dockerfile file

FROM openjdk:10-jdk
VOLUME /tmp
ADD https://example.com/big.tar.xz /usr/src/things/
RUN tar -xJf /usr/src/things/big.tar.xz -C /usr/src/things
RUN make -C /usr/src/things all

Code samples without security vulnerabilities¶

Negative test num. 1 - dockerfile file

FROM openjdk:10-jdk
RUN mkdir -p /usr/src/things \
    && curl -SL https://example.com/big.tar.xz \
    | tar -xJC /usr/src/things \
    && make -C /usr/src/things all

Negative test num. 2 - dockerfile file

FROM openjdk:10-jdk
ADD ./drop-http-proxy-header.conf /etc/apache2/conf-available
RUN mkdir -p /usr/src/things \
    && curl -SL https://example.com/big.tar.xz \
    | tar -xJC /usr/src/things \
    && make -C /usr/src/things all