Dockerfile to setup environment for https://www.securusglobal.com/community/2014/03/17/how-i-got-root-with-sudo/

Dockerfile

# Only CentOS 6.4 is avialable, not 6.5
#FROM centos:6.4

# Unoffical repository. Has CentOS 6.5
FROM tianon/centos:6.5

# Add zip and sudo. Is sudo usually absent from default installs?
RUN yum install -y sudo zip

# Make a original-docs.zip with some files in it
RUN cd "$(mktemp -d)" \
  && echo "a" > doc1 \
  && mkdir dir \
  && echo "b" > dir/doc2 \
  && zip -r /root/original-docs.zip . \
  && chmod 600 /root/original-docs.zip

# Make extracted-docs.zip an empty zip. zip doesn't really like that though
RUN cd "$(mktemp -d)" \
  && touch empty \
  && zip /var/lib/extracted-docs.zip empty \
  && zip /var/lib/extracted-docs.zip -d empty

# Cleanup
RUN rm -r /tmp/*

ADD extract_docs.sh /usr/local/bin/extract_docs.sh
RUN chmod +x /usr/local/bin/extract_docs.sh

# Setup users
RUN adduser kevin
RUN echo "root:pass" | chpasswd
RUN echo "kevin:pass" | chpasswd

# Allow kevin to run extract_docs.sh
RUN echo "kevin    ALL=/usr/local/bin/extract_docs.sh" > /etc/sudoers.d/sudoescape

USER kevin
CMD bash

extract_docs.sh

#!/bin/bash
zip -U /root/original-docs.zip -O /var/lib/extracted-docs.zip "$@"