CVE-2018-4020 — AI Deep Analysis Summary

🚨 **Essence**: OS Command Injection in pfSense CE. 📉 **Consequences**: Attackers can execute **arbitrary commands** on the system. Total compromise of the firewall/router is possible.

🛡️ **Root Cause**: Flaw in the `powerd_ac_mode` POST parameter. ⚠️ **Flaw**: Input validation failure allowing shell command injection. (CWE not specified in data).

🏢 **Vendor**: Netgate. 📦 **Product**: pfSense CE. 📅 **Affected Version**: **2.4.4-RELEASE** specifically mentioned.

💻 **Privileges**: System-level access. 📂 **Data**: Full control over the firewall. 🕵️ **Action**: Hackers run **any command** they want on the host OS.

🔑 **Auth**: Likely requires access to the web interface (POST parameter). ⚙️ **Config**: Specific to the power management settings. Threshold depends on web UI exposure.

📜 **Public Exp**: No PoC listed in the provided data. 🔍 **Source**: Referenced by Talos Intelligence (TALOS-2018-0690). Wild exploitation risk exists if details leak.

🔍 **Check**: Scan for pfSense 2.4.4-RELEASE. 📡 **Feature**: Look for `powerd_ac_mode` POST requests in network traffic. 🛠️ **Tool**: Use vulnerability scanners targeting pfSense.

🩹 **Patch**: Update to a fixed version. 📢 **Official**: Netgate released security updates. Check vendor site for the latest stable release.

🚧 **Workaround**: Restrict access to the web GUI. 🚫 **Mitigation**: Disable unnecessary power management features if possible. 🛑 **Block**: Firewall rules to limit external access to management ports.

🔥 **Urgency**: **HIGH**. 💥 **Priority**: Critical. OS Command Injection allows full system takeover. Patch immediately if running 2.4.4-RELEASE.