Initial commit

services.old/back-to-basic/Dockerfile

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