Half Automated Docker Script

.gitignore

@@ -1 +1,2 @@
 *.DS_Store
+*.gdb_history

Dockerfile

@@ -0,0 +1,24 @@
+FROM ubuntu:16.04
+MAINTAINER insp3ct0r_x
+
+ARG DEBIAN_FRONTEND=noninteractive
+
+ENV TZ Asia/Seoul
+
+RUN sed -i "s/archive.ubuntu.com/mirror.kakao.com/g" /etc/apt/sources.list
+RUN apt update && apt upgrade -y
+RUN apt install xinetd gdbserver binutils -y
+
+RUN dpkg --add-architecture i386
+RUN apt update
+RUN apt install libc6-dbg libc6:i386 libc6-dbg:i386 -y
+
+WORKDIR /root/
+COPY chall.bin /root/
+RUN chmod 755 /root/chall.bin
+COPY chall.daemon /etc/xinetd.d/chall
+RUN echo "chall	9929/tcp" >> /etc/services
+
+COPY ep.sh /root/
+RUN chmod 755 /root/ep.sh
+ENTRYPOINT ["/root/ep.sh"]

chall.daemon

@@ -0,0 +1,11 @@
+service chall
+{
+	socket_type = stream
+	flags = REUSE
+	wait = no
+	protocol = tcp
+	user = root
+	disable = no
+	server = /root/chall.bin
+	port = 9929
+}

docker-compose.yml

@@ -0,0 +1,10 @@
+services:
+  chall:
+      build: ./
+      ports:
+        - "9929:9929" # for challenge
+        - "929:929" # for remote debugging
+      cap_add:
+        - SYS_PTRACE
+      security_opt:
+        - seccomp:unconfined

ep.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+echo "[!] Container is started... Setting up xinetd"
+/etc/init.d/xinetd restart 1>/dev/null
+
+echo "[!] If challenge session is connected, gdbserver is run automatically..."
+while [[ 1 ]]; do
+	PID=$(pidof /root/chall.bin 2>/dev/null)
+	if [[ -n $PID ]]; then
+		gdbserver 0.0.0.0:929 --attach $PID 2>/dev/null
+	fi
+done