CVE-2006-4313 — AI Deep Analysis Summary

🚨 **Essence**: Cisco VPN 3000 Concentrator FTP service has critical flaws. 📉 **Consequences**: Attackers can manipulate the file system directly via FTP commands like CWD, MKD, RMD, and RNFR.…

🛡️ **Root Cause**: Insecure implementation of the FTP management protocol. 🚫 **Flaw**: Lack of proper access controls or path validation for specific FTP commands (CWD, MKD, CDUP, RNFR, SIZE, RMD).…

🎯 **Affected**: Cisco VPN 3000 Series Concentrators. ⚙️ **Condition**: Specifically when the **FTP file management protocol** is enabled. This is a legacy enterprise network device.

💀 **Hackers Can**: Execute dangerous FTP commands. 📂 **Actions**: Change directories (CWD/CDUP), create new folders (MKD), delete directories (RMD), rename files (RNFR), and check file sizes (SIZE).…

⚠️ **Threshold**: Medium. 🔑 **Auth**: Likely requires valid credentials to access the management interface, BUT ⚙️ **Config**: The vulnerability is triggered by the *configuration* of having FTP enabled.…

📜 **Public Exp?**: Yes. 📚 **References**: Multiple advisories exist (OSVDB 28138/28139, BID 19680, VUPEN ADV-2006-3368). Cisco issued a specific security advisory (20060823).…

🔍 **Self-Check**: Scan for Cisco VPN 3000 devices. 📡 **Feature**: Check if the **FTP management service** is enabled on the device. If FTP is active on this specific hardware model, it is vulnerable.

🩹 **Fixed?**: Yes. 📅 **Date**: Patched/Advised on **2006-08-23**. Cisco released a security advisory (cisco-sa-20060823-vpn3k.shtml) addressing these vulnerabilities. Updates or configuration changes were recommended.

🚧 **No Patch?**: Disable the FTP service immediately! 🛑 **Workaround**: Switch to a more secure file transfer method (like SCP/SFTP if available) or disable remote file management via FTP entirely.…

🔥 **Urgency**: Low for modern networks. 📉 **Priority**: This is a **2006** vulnerability. Most modern networks have retired this hardware.…