pfSense CVE-2024-3964 Pre-Auth RCE Analysis with POC

pfSense-Opcode-Secret-Bang Vulnerability Summary Vulnerability Overview Vulnerability Name: pfSense-Opcode-Secret-Bang CVE ID: CVE-2024-3833 CVSS Score: 9.8 (Critical) Vulnerability Type: Remote Code Execution (RCE) Description: In pfSense versions 2.7.2 and earlier, insufficient input validation for the command allows attackers to craft malicious requests to execute arbitrary commands with root privileges on the target system. This vulnerability enables attackers to bypass authentication mechanisms and directly inject shell commands via the parameter of . Affected Scope Affected Products: pfSense 2.7.2 and earlier versions Affected Component: The command invocation logic within the pfSense Web Management Interface Attack Conditions: - The attacker must be able to access the pfSense management interface (typically requiring login credentials) - Malicious parameters can be sent via POST requests to - RCE can be triggered without additional privileges (as runs as root) Remediation Official Fix: - Upgrade to pfSense 2.7.3 or later (this version includes the fix) - If immediate upgrade is not possible, temporarily disable -related features or restrict access to the Web Management Interface Mitigation Measures: - Restrict management interface access to trusted IP addresses only - Enable Two-Factor Authentication (2FA) - Regularly update the system and monitor for anomalous log entries POC / Exploit Code > ⚠️ Warning: The code above is intended solely for security research and authorized testing. Unauthorized use for illegal purposes will result in legal liability. Additional Information Vulnerability Discoverer: Unpublished (not mentioned on the page) Disclosure Date: 2024 (inferred from the CVE ID) Related Resources: - pfSense Official Announcement - CVE-2024-3833 Details --- ✅ All pfSense users are advised to immediately check their version and upgrade to the latest stable release.

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pfSense CVE-2024-3964 Pre-Auth RCE Analysis with POC

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