CVE-2021-47667 — AI Deep Analysis Summary

🚨 **Essence**: ZendTo (Web file transfer) has a critical flaw. Shell meta-characters in the `tmp_name` parameter allow **Remote Code Execution (RCE)**.…

🛡️ **Root Cause**: **CWE-78** (OS Command Injection). The system fails to sanitize the `tmp_name` parameter, allowing attackers to inject malicious shell commands directly into the OS. 💥

📦 **Affected**: **ZendTo** by Zend. Specifically versions **5.24-3** up to **6.10-7** (exclusive). If you are running these versions, you are vulnerable. ⚠️

💀 **Attacker Capabilities**: Unauthenticated remote attackers can execute **arbitrary commands**. This grants **High** impact on Confidentiality, Integrity, and Availability. 🗝️

🔓 **Threshold**: **LOW**. CVSS indicates **AV:N** (Network), **AC:L** (Low Complexity), **PR:N** (No Privileges required). No login or special config needed to exploit. 🎯

🔍 **Public Exploit**: The provided data lists **no specific PoCs** (`pocs: []`). However, references point to a blog post by Project Black.io discussing 'nday' vulnerabilities, implying real-world awareness. 📝

🔎 **Self-Check**: Scan for ZendTo instances on your network. Check version numbers against the affected range (5.24-3 to 6.10-7). Look for unusual web traffic targeting file upload endpoints. 🕵️‍♂️

🩹 **Fix Status**: The vulnerability exists in versions *before* 6.10-7. You must **upgrade** to version **6.10-7 or later** to receive the official patch. 🔄

🚧 **No Patch Workaround**: If upgrading isn't possible, **block external access** to the ZendTo service immediately. Use WAF rules to block shell meta-characters in upload parameters. 🛑

🔥 **Urgency**: **CRITICAL**. CVSS score is likely **9.8-10.0** (High/Critical). RCE with no auth is a top-priority fix. Patch immediately to prevent server takeover. ⏳