Submission ready state achieved (#8)

release_docker/Dockerfile

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+FROM debian:bullseye
+
+
+RUN apt update -y && apt upgrade -y && apt install -y build-essential wget cmake
+
+
+############### INSTALL FNETD
+RUN wget https://cloud.sec.in.tum.de/index.php/s/n5cJnDqnnpSeEpd/download/fnetd.tar.xz -O /fnetd.tar.xz
+RUN tar -xf fnetd.tar.xz
+RUN mkdir /fnetd/build
+
+WORKDIR /fnetd/build
+RUN cmake .. -G "Unix Makefiles"
+RUN make
+
+WORKDIR /
+############### END INSTALL
+
+COPY get_flag /bin/get_flag
+
+COPY libc-2.31.so /lib/x86_64-linux-gnu/libc-2.31-bx.so
+RUN ln -sf /lib/x86_64-linux-gnu/libc-2.31-bx.so /lib/x86_64-linux-gnu/libc.so.6
+
+RUN useradd -m pwn
+
+COPY vuln /home/pwn/vuln
+COPY activation_key.txt /home/pwn/activation_key.txt
+
+RUN chmod 0755 /home/pwn/vuln
+
+EXPOSE 1337
+
+# Feel free to replace password with the actual chall pw
+ENV FNETD_PASSWORD=
+CMD ["/fnetd/build/fnetd", "-p", "1337", "-u", "pwn", "-lt", "2", "-lm", "536870912", "./vuln"]

release_docker/README.md

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+### Deployment path for this challenge:
+
+#### Setup:
+- copy get_flag, vuln and course libc-2.31.so into the same directory as the Dockerfile
+- make sure the activation_key.txt is already present in the same directory and contains a poem about being a penguin ending in a forkbomb
+- set the fnetd password
+
+#### Deployment:
+- build docker image
+- run docker container
+- profit