CVE-2023-4347 — AI Deep Analysis Summary

🚨 **Essence**: A Cross-Site Scripting (XSS) flaw in LibreNMS. <br>💥 **Consequences**: Attackers inject malicious JavaScript via the `/ports/group` parameter.…

🛡️ **Root Cause**: **CWE-79** (Improper Neutralization of Input During Web Page Generation).…

📦 **Affected**: **LibreNMS** (Open-source network monitoring system). <br>📅 **Version**: Versions **prior to 23.8.0**. <br>👥 **Vendor**: LibreNMS Community. 🌐

🕵️ **Hackers Can**: Execute arbitrary external JavaScript code. <br>🔓 **Impact**: Steal user cookies/sessions, redirect users to phishing sites, or perform actions on behalf of the victim.…

⚠️ **Threshold**: **Medium**. <br>🔑 **Auth**: Likely requires the victim to be logged into LibreNMS. <br>🎣 **Vector**: Requires social engineering or a malicious link pointing to the specific `/ports/group` endpoint.…

📜 **Public Exp?**: Yes. <br>🔗 **References**: Proof-of-Concepts and details are available on **huntr.dev** and the **GitHub commit** history.…

🔍 **Self-Check**: <br>1. Check your LibreNMS version (`< 23.8.0`). <br>2. Scan for the `/ports/group` parameter in URLs. <br>3. Look for unsanitized input reflection in the UI.…

✅ **Fixed?**: **Yes**. <br>🔧 **Patch**: Fixed in **LibreNMS 23.8.0**. <br>📝 **Commit**: See GitHub commit `91c57a1ee54631e071b6b0c952d99c8ee892e824`. <br>🚀 **Action**: Upgrade immediately! 🚀

🚧 **No Patch?**: <br>1. **Input Validation**: Implement strict allow-lists for the `/ports/group` parameter. <br>2. **Output Encoding**: Ensure all user inputs are HTML-encoded before rendering. <br>3.…

🔥 **Urgency**: **HIGH**. <br>📢 **Priority**: Critical for all LibreNMS admins. <br>⏳ **Reason**: XSS is a common, high-impact attack vector.…