CVE-2020-28188 — AI Deep Analysis Summary

🚨 **Essence**: Remote Code Execution (RCE) via OS Command Injection. 💥 **Consequences**: Attackers can execute arbitrary system commands on the NAS server, potentially leading to full system compromise and data theft.

🛡️ **Root Cause**: Improper input validation in `/include/makecvs.php`. 📉 **Flaw**: The `Event` parameter is not sanitized, allowing direct injection of OS commands into the backend.

📦 **Affected**: TerraMaster TOS (Network Attached Storage OS). 📅 **Versions**: Version **4.2.06** and all earlier versions. 🏭 **Vendor**: TerraMaster (China).

💀 **Privileges**: Remote Unauthenticated. 🔓 **Impact**: Attackers gain the ability to run commands with the privileges of the web server process. This can lead to full control over the NAS device.

🔓 **Threshold**: **LOW**. ⚠️ **Auth**: No authentication required. 🌐 **Access**: Exploitable remotely via the web interface endpoint `/include/makecvs.php`.

🔥 **Public Exp**: **YES**. 📂 **PoCs**: Available on GitHub (e.g., ProjectDiscovery Nuclei templates, Awesome-POC). 🕸️ **Wild Exp**: Referenced in Checkpoint research regarding botnet creation.

🔍 **Self-Check**: Scan for the specific endpoint `/include/makecvs.php`. 🧪 **Test**: Use Nuclei templates or manual HTTP requests to inject test commands via the `Event` parameter. 📡 **Tools**: Nuclei, Burp Suite.

🛠️ **Fix**: Official patches are available from TerraMaster. 📥 **Action**: Update TOS to a version newer than 4.2.06. 📝 **Ref**: Check vendor advisory for specific patch details.

🚧 **Workaround**: If patching is delayed, block external access to the web management interface. 🚫 **Mitigation**: Disable remote access features or restrict IP access to trusted networks only.…

⚡ **Urgency**: **HIGH**. 🚨 **Priority**: Critical due to unauthenticated RCE. 📉 **Risk**: Easily exploitable by automated bots. 🏃 **Action**: Patch immediately or isolate the device from the internet.