CVE-2021-3019 — AI Deep Analysis Summary

🚨 **Essence**: Path Traversal in **Ffay Lanproxy** v0.1. 📉 **Consequences**: Attackers can read sensitive internal files (e.g., `config.properties`), leaking credentials for intranet connections.…

🛡️ **Root Cause**: **Directory Traversal** (Path Traversal).…

🎯 **Affected Product**: **Ffay Lanproxy**. 📦 **Version**: Specifically **v0.1**. 🌐 **Context**: An intranet penetration tool proxying LAN services to the public network. ⚠️ **Vendor**: n/a (Personal developer project).

🕵️ **Hackers Can**: Read arbitrary files via directory traversal. 🔑 **Data Stolen**: Internal connection credentials from `conf/config.properties`.…

🔓 **Threshold**: **LOW**. 🚫 **Auth**: No authentication required for exploitation. ⚙️ **Config**: Only requires the Lanproxy service to be running and accessible. 🎯 **Ease**: Simple HTTP request with `../` payloads.…

🔥 **Public Exp**: **YES**. 📂 **PoCs**: Multiple GitHub repositories exist (e.g., `B1anda0`, `0xf4n9x`, `Maksim-venus`). 🛠️ **Tools**: Python scripts available for single URL or batch scanning (`urls.txt`).…

🔍 **Self-Check**: Send HTTP request with `../` traversal payload to the proxy port (e.g., `9100`). 📄 **Target**: Look for content of `conf/config.properties`. 🧪 **Tools**: Use provided POC scripts (`CVE-2021-3019.py`).…

🚫 **Official Patch**: **NO** official patch mentioned in data. 📅 **Published**: Jan 5, 2021. 🔄 **Status**: Repository commits exist, but no specific fix version is listed in the provided data.…

🛡️ **Workaround**: **Restrict Network Access**. 🚧 **Firewall**: Block external access to Lanproxy ports (e.g., 9100). 🔒 **Auth**: If possible, add authentication layer in front of the proxy.…

🔴 **Priority**: **HIGH**. ⚡ **Urgency**: Critical due to low exploitation barrier and high impact (credential theft). 📢 **Action**: Immediate network isolation or patching required.…