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Dockerfile 821B

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  1. # Use ubuntu 16.04
  2. FROM ubuntu:16.04
  3. EXPOSE 2020
  4. RUN apt-get update
  5. # install socat editor ssh
  6. RUN apt-get install socat -y
  7. RUN adduser --disabled-password --gecos "" ksl
  8. RUN echo "ksl:sebuahrahasiamas" | chpasswd
  9. RUN mkdir chall
  10. WORKDIR /chall
  11. # Secure ENV
  12. COPY flag.txt .
  13. COPY version002 .
  14. RUN echo 'alias kill="echo no kill please!"' >> ~/.bashrc
  15. RUN chmod 700 /tmp /usr/bin/* /bin/* /dev/shm
  16. # RUN chmod 755 /usr/bin/env /bin/dash /bin/bash /bin/sh /bin/nc /bin/cat /usr/bin/curl /usr/bin/groups /usr/bin/id /bin/ls /usr/bin/python /usr/bin/ruby
  17. RUN chown root:ksl /chall/version002
  18. RUN chmod 775 /chall/version002
  19. # Run Service
  20. RUN echo '#!/bin/bash'"\n(socat TCP-LISTEN:2020,reuseaddr,fork EXEC:"/chall/version002,su=nobody")" > /var/tmp/.start.sh && chmod +x /var/tmp/.start.sh
  21. CMD ["/var/tmp/.start.sh"]