29 lines
735 B
Docker
29 lines
735 B
Docker
FROM public.ecr.aws/docker/library/ubuntu:20.04
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ARG PASSWORD
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ENV DEBIAN_FRONTEND noninteractive
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RUN echo root:${PASSWORD} | chpasswd
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RUN apt-get update && apt-get install -y openssh-server lib32z1 xinetd cmake gcc curl
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RUN echo "PasswordAuthentication yes" >> /etc/ssh/sshd_config
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RUN echo "PermitRootLogin yes" >> /etc/ssh/sshd_config
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RUN service ssh start
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RUN useradd -m ctf
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WORKDIR /ctf
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RUN echo "Connection blocked" > /etc/banner_fail
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COPY ctf.xinetd /etc/xinetd.d/ctf
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COPY ./src/main.c ./
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COPY ./start.sh ./
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RUN gcc /ctf/main.c -no-pie -fno-stack-protector -Wl,-z,relro,-z,now -o /ctf/main
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RUN touch /flag.txt
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RUN chmod -R 755 /ctf
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RUN chmod +x /ctf/start.sh
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ENTRYPOINT []
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CMD ["/usr/sbin/xinetd", "-dontfork"]
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EXPOSE 8000 |