CVE-2021-3017 — AI Deep Analysis Summary

🚨 **Essence**: A credential leakage flaw in Intelbras routers. 📉 **Consequences**: Attackers can steal Wi-Fi passwords by simply viewing the page source code. No complex hacking needed!

🛡️ **Root Cause**: Poor handling of sensitive data in HTML. 🐛 **Flaw**: The wireless password is exposed in the `def_wirelesspassword` line within the HTML source code. It's a classic **Information Disclosure** issue.

🌍 **Affected**: Intelbras WIN 300 and WRN 342 devices. 📅 **Version**: Versions released on or before **2021-01-04**. If you have an older router, you are at risk!

💻 **Action**: Remote attackers can discover credentials. 🔑 **Data**: Specifically, the **wireless password** is exposed. This allows unauthorized access to your network.

🔓 **Threshold**: **LOW**. 🚫 **Auth**: No authentication required! 🌐 **Config**: Just need to access the router's web interface. Anyone on the network (or potentially remote if exposed) can view the source.

📢 **Exploit**: Yes, public PoCs exist. 🔗 **Links**: Nuclei templates and Awesome-POC repos have scripts ready to detect this. Wild exploitation is easy for anyone with basic skills.

🔍 **Check**: Open the router's login page in a browser. 👁️ **Action**: Right-click -> **View Page Source**. 🔎 **Search**: Look for `def_wirelesspassword`. If you see a value there, you are vulnerable!

🔧 **Fix**: Update firmware immediately. 📦 **Patch**: Intelbras released updates after Jan 4, 2021. Check the official Intelbras support page for the latest version for WIN 300/WRN 342.

🛡️ **Workaround**: If you can't patch, **change your Wi-Fi password** immediately. 🔒 **Mitigation**: Ensure the router's admin interface is not exposed to the public internet. Use a firewall to restrict access.

⚡ **Priority**: **HIGH**. 🚨 **Urgency**: Since no auth is needed and PoCs are public, this is an easy target for automated bots. Fix it NOW to protect your network privacy!