CVE-2021-30461 — AI Deep Analysis Summary

🚨 **What is this vulnerability?** VoIPmonitor **Code Injection** flaw.…

🛡️ **Root Cause?** 🔍 **Flaw:** Improper Input Validation. - The `recheck` option accepts user-supplied `SPOOLDIR` values. - These values may contain **PHP code**. - The code is directly injected into the config file wi…

👥 **Who is affected?** - **Product:** VoIPmonitor. - **Version:** **< 24.61** (Specifically mentions < 24.60 in PoCs). - **Component:** Web UI. - **Vendor:** VoIPmonitor Team.

🕵️ **What can hackers do?** - **Full RCE:** Execute commands as the web server user. - **Persistent Access:** Deploy a **browser-based web shell** (e.g., `namrlblgel.php`). - **Data Theft:** Access sensitive VoIP data, …

🔓 **Is exploitation threshold high?** ❌ **NO.…

💣 **Is there a public Exp?** ✅ **YES.** - Multiple PoCs available on GitHub. - **Tool:** `CVE-2021-30461.py`. - **Usage:** `python3 CVE-2021-30461.py -t <IP>`. - **Result:** Direct RCE and shell deployment.

🔎 **How to self-check?** 1. **Scan:** Use Nuclei template `http/cves/2021/CVE-2021-30461.yaml`. 2. **Verify:** Check if your VoIPmonitor version is **< 24.61**. 3.…

🩹 **Is it fixed officially?** ✅ **YES.** - **Fix Version:** **24.61** and later. - **Action:** Upgrade VoIPmonitor to version 24.61+ immediately. - **Reference:** SSD Disclosure Advisory.

🚧 **What if no patch?** - **Network Segmentation:** Block external access to the VoIPmonitor Web UI. - **WAF Rules:** Block requests containing `recheck` with suspicious payloads. - **Input Filtering:** If possible, res…

⚠️ **Is it urgent?** 🔴 **CRITICAL PRIORITY.** - **Unauthenticated RCE** is a top-tier threat. - **Public Exploits** exist and are easy to use. - **Impact:** Complete server compromise. - **Action:** Patch **IMMEDIATELY…