Address CVE-2024-42471 (#9)

* Fix CVE-2024-42471
* Include fnetd into repository, download link is broken

debug_docker/Dockerfile

@@ -8,18 +8,7 @@ FROM debian:bullseye
 
 RUN apt update -y && apt upgrade -y && apt install -y build-essential wget cmake tar gdb libc6-dbg python3 file strace
 
-
-############### 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 fnetd /bin/
 
 ## Add your own dummy get_flag here
 COPY get_flag /bin/get_flag
@@ -36,7 +25,7 @@ RUN mkdir /home/pwn/source
 RUN tar xvf /home/pwn/parent.tar.xz -C /home/pwn/source
 RUN mkdir /home/pwn/build
 WORKDIR /home/pwn/build
-RUN cmake /home/pwn/source -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release
+RUN DISABLE_PRESENTATION_BUILD=true cmake /home/pwn/source -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release
 RUN make
 WORKDIR /
 
@@ -53,4 +42,4 @@ EXPOSE 1337
 
 # Feel free to replace password with the actual chall pw
 ENV FNETD_PASSWORD=1234
-CMD ["/fnetd/build/fnetd", "-p", "1337", "-u", "pwn", "-lt", "2", "-lm", "536870912", "./vuln"]
+CMD ["fnetd", "-p", "1337", "-u", "pwn", "-lt", "2", "-lm", "536870912", "./vuln"]

debug_docker/launch.sh

@@ -1,6 +1,7 @@
 rm -f parent
 find ..  -maxdepth 1 -type f | xargs tar cvf parent.tar.xz
+cp ../fnetd .
 docker container rm binex_project
 docker image rm binex_project
 docker build -t binex_project .
-docker run -it -p 1337:1337 --cap-add=SYS_PTRACE --name binex_project binex_project
+docker run -it -p 8001:1337 --cap-add=SYS_PTRACE --name binex_project binex_project