CVE-2023-48123 — AI Deep Analysis Summary

Q: What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Arbitrary Code Execution (RCE) in `packet_capture.php`. 💥 **Consequences**: Attackers can run **any shell command** on the system. Total system compromise is possible. 📉

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: Command Injection flaw. 🔍 **Flaw**: The `diag_packet_capture.php` component fails to properly sanitize user input before passing it to system commands. ⚠️

Q: Who is affected? (Versions/Components)

🏢 **Affected**: Netgate pfSense. 📦 **Versions**: • pfSense Plus **v.23.05.1** and earlier. • pfSense CE **v.2.7.0**. 🌐 **Component**: Web GUI (`packet_capture.php`).

Q: What can hackers do? (Privileges/Data)

👑 **Privileges**: System-level access (Root/Admin). 📂 **Data**: Full read/write access to all files, network configs, and credentials. 🔓 **Action**: Execute arbitrary commands via shell. 💀

Q: Is exploitation threshold high? (Auth/Config)

🔐 **Threshold**: **High** (Requires Auth). 👤 **Requirement**: Attacker must be an **authenticated** user with access to the pfSense web interface. Not remote unauthenticated. 🚫

Q: How to self-check? (Features/Scanning)

🔍 **Self-Check**: 1. Check pfSense version (≤ 2.7.0 CE / ≤ 23.05.1 Plus). 2. Scan for `diag_packet_capture.php` endpoint. 3. Verify if authenticated users can trigger packet capture with injected payloads. 🧪

Q: Is it fixed officially? (Patch/Mitigation)

✅ **Fixed**: **YES**. 📜 **Patch**: Official advisory `pfSense-SA-23_11.webgui.asc`. 🔗 **Commit**: `f72618c4abb61ea6346938d0c93df9078736b775`. 📥 **Action**: Update to latest version immediately. 🔄

Q: Is it urgent? (Priority Suggestion)

🚨 **Urgency**: **CRITICAL**. ⏱️ **Priority**: **P1**. 💡 **Reason**: Public PoCs exist + Authenticated RCE = High risk of immediate exploitation. Patch now! 🏃♂️💨

Updated May 08, 2026

This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis →

Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Arbitrary Code Execution (RCE) in `packet_capture.php`. <br>💥 **Consequences**: Attackers can run **any shell command** on the system. Total system compromise is possible. 📉

Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: Command Injection flaw. <br>🔍 **Flaw**: The `diag_packet_capture.php` component fails to properly sanitize user input before passing it to system commands. ⚠️

Q3Who is affected? (Versions/Components)

🏢 **Affected**: Netgate pfSense. <br>📦 **Versions**: <br>• pfSense Plus **v.23.05.1** and earlier. <br>• pfSense CE **v.2.7.0**. <br>🌐 **Component**: Web GUI (`packet_capture.php`).

Q4What can hackers do? (Privileges/Data)

👑 **Privileges**: System-level access (Root/Admin). <br>📂 **Data**: Full read/write access to all files, network configs, and credentials. <br>🔓 **Action**: Execute arbitrary commands via shell. 💀

Q5Is exploitation threshold high? (Auth/Config)

🔐 **Threshold**: **High** (Requires Auth). <br>👤 **Requirement**: Attacker must be an **authenticated** user with access to the pfSense web interface. Not remote unauthenticated. 🚫

Q6Is there a public Exp? (PoC/Wild Exploitation)

💻 **Public Exp**: **YES**. <br>📂 **PoCs Available**: <br>• GitHub: `NHPT/CVE-2023-48123` <br>• GitHub: `Farzan-Kh/CVE-2023-48123` (Python script with Netcat reverse shell).…

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Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: <br>1. Check pfSense version (≤ 2.7.0 CE / ≤ 23.05.1 Plus). <br>2. Scan for `diag_packet_capture.php` endpoint. <br>3. Verify if authenticated users can trigger packet capture with injected payloads. 🧪

Q8Is it fixed officially? (Patch/Mitigation)

✅ **Fixed**: **YES**. <br>📜 **Patch**: Official advisory `pfSense-SA-23_11.webgui.asc`. <br>🔗 **Commit**: `f72618c4abb61ea6346938d0c93df9078736b775`. <br>📥 **Action**: Update to latest version immediately. 🔄

Q9What if no patch? (Workaround)

🚧 **Workaround (No Patch)**: <br>1. **Restrict Access**: Limit Web GUI access to trusted IPs only. <br>2. **Disable Feature**: If possible, disable packet capture functionality via firewall rules or GUI restrictions.…

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Q10Is it urgent? (Priority Suggestion)

🚨 **Urgency**: **CRITICAL**. <br>⏱️ **Priority**: **P1**. <br>💡 **Reason**: Public PoCs exist + Authenticated RCE = High risk of immediate exploitation. Patch now! 🏃‍♂️💨

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