Skip to content

Optimize Dockerfile #1

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Oct 13, 2024
Merged

Optimize Dockerfile #1

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
64 changes: 37 additions & 27 deletions Dockerfile
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,36 +1,46 @@
FROM ubuntu:24.04

# Base packages for main CTF machine
RUN apt-get update && \
apt-get install -y docker.io docker-compose-v2 openssh-server nano && \
apt-get clean && rm -rf /var/lib/apt/lists/*

# Setup docker env + ssh env
RUN mkdir -p /var/lib/docker /run/sshd && \
sed -i "s/#PermitRootLogin.*/PermitRootLogin no/" /etc/ssh/sshd_config && \
sed -i "s/#PasswordAuthentication.*/PasswordAuthentication yes/" /etc/ssh/sshd_config && \
ssh-keygen -A

# Adding user king + bash configuring + Linking .bash_history to /dev/null
RUN useradd -m king && echo -n "king:Password12345" | chpasswd && \
chmod 0700 /home/king && userdel ubuntu && \
sed -i 's#/bin/sh#/bin/bash#' /etc/passwd && \
ln -sf /dev/null /root/.bash_history && \
ln -sf /dev/null /home/king/.bash_history

# flags + permissions
RUN apt-get update \
&& apt-get install -y docker.io docker-compose-v2 openssh-server nano \
&& apt-get clean \
&& rm -rf /var/lib/apt/lists/* && \

echo "Setup docker env + ssh env" \
&& mkdir -p /var/lib/docker /run/sshd \
&& sed -i "s/#PermitRootLogin.*/PermitRootLogin no/" /etc/ssh/sshd_config \
&& sed -i "s/#PasswordAuthentication.*/PasswordAuthentication yes/" /etc/ssh/sshd_config \
&& ssh-keygen -A && \

echo "Adding user king" \
&& useradd -m king \
&& echo -n "king:Password12345" | chpasswd \
&& chmod 0700 /home/king \
&& userdel ubuntu && \

echo "Bash configuring" \
&& sed -i 's#/bin/sh#/bin/bash#' /etc/passwd && \

echo "Linking .bash_history to /dev/null" \
&& ln -sf /dev/null /root/.bash_history \
&& ln -sf /dev/null /home/king/.bash_history

# Copying flags + main files
COPY ./main_flags/root.txt /root/root.txt
COPY ./main_flags/user.txt /home/king/user.txt
RUN chown root:root /root/root.txt && chmod 0400 /root/root.txt && \
chown king:king /home/king/user.txt && chmod 0400 /home/king/user.txt

# Copying main files + privileges
COPY ./docker-web /home/king/docker-web
RUN chmod 0755 /home/king/docker-web && chown -R root:root /home/king/docker-web && \
chmod 0700 /home/king/docker-web/.ssh.tar && \
chmod 0400 -R /home/king/docker-web/flags && \
chmod 0640 /home/king/docker-web/sudoers && \
mkdir -p /home/king/docker-web/html/logs && chmod 0777 /home/king/docker-web/html/logs


RUN echo "Permissions for flags" \
&& chown root:root /root/root.txt && chmod 0400 /root/root.txt \
&& chown king:king /home/king/user.txt && chmod 0400 /home/king/user.txt && \

echo "Permissions for main files" \
&& chmod 0755 /home/king/docker-web && chown -R root:root /home/king/docker-web \
&& chmod 0700 /home/king/docker-web/.ssh.tar \
&& chmod 0400 -R /home/king/docker-web/flags \
&& chmod 0640 /home/king/docker-web/sudoers \
&& mkdir -p /home/king/docker-web/html/logs && chmod 0777 /home/king/docker-web/html/logs


EXPOSE 22 23 3306 8080
Expand Down