Metasploit Unveils Exploit Module for Critical FortiWeb Vulnerabilities
The cybersecurity community is on high alert following the release of a new Metasploit exploit module targeting critical vulnerabilities in Fortinet’s FortiWeb Web Application Firewall (WAF). This development underscores the escalating threats to network security appliances and the imperative for organizations to implement robust defense mechanisms.
Understanding the Vulnerabilities
The newly introduced Metasploit module exploits two significant vulnerabilities: CVE-2025-64446 and CVE-2025-58034. When combined, these flaws enable unauthenticated remote code execution (RCE) with root privileges, posing a severe risk to affected systems.
CVE-2025-64446: Authentication Bypass via Path Traversal
CVE-2025-64446 is a critical authentication bypass vulnerability with a CVSS score of 9.1. The flaw arises from a path traversal issue coupled with improper handling of the CGIINFO header. By manipulating this header and navigating to the ‘fwbcgi’ executable, an unauthenticated attacker can impersonate the built-in admin user, facilitating the creation of new administrative accounts without valid credentials.
CVE-2025-58034: Authenticated Command Injection
CVE-2025-58034 is an authenticated command injection vulnerability found in the FortiWeb API and Command Line Interface (CLI). This flaw results from inadequate neutralization of special elements in operating system commands. An authenticated user can exploit this vulnerability to escape shell restrictions and execute commands as the root user, thereby gaining full control over the system.
The Exploitation Chain
The Metasploit module, identified as ‘exploit/linux/http/fortinet_fortiweb_rce,’ automates an attack sequence that begins with exploiting CVE-2025-64446 to bypass authentication. This initial step allows the attacker to create a new administrative account. Subsequently, the module leverages CVE-2025-58034 to execute arbitrary operating system commands, culminating in unauthenticated RCE with root privileges.
Technical Execution
The exploit employs a chunked upload mechanism to deliver its payload. The module uploads a bootstrap payload in multiple parts, which are then combined and executed. This method ensures reliable execution within the constrained environment of the appliance. Successful exploitation grants the attacker a shell with root access, providing complete control over the WAF device.
Implications for Organizations
The release of this Metasploit module has significant implications for organizations utilizing FortiWeb WAFs. The ability to achieve unauthenticated RCE with root privileges means that attackers can potentially:
– Compromise Sensitive Data: Access and exfiltrate confidential information processed by the WAF.
– Disrupt Services: Modify or disable critical services, leading to downtime and operational disruptions.
– Establish Persistent Access: Install backdoors or other malicious tools to maintain long-term access to the network.
Mitigation Strategies
To mitigate the risks associated with these vulnerabilities, organizations should take the following steps:
1. Immediate Patching: Fortinet has released patches addressing these vulnerabilities. Users are strongly advised to upgrade to FortiWeb version 8.0.2 or later without delay.
2. Audit Administrative Accounts: Given that CVE-2025-64446 allows for the silent creation of rogue administrators, it is crucial to audit user lists for unknown accounts.
3. Monitor Logs: Review logs for requests to ‘/api/v2.0/cmdb/system/admin’ originating from untrusted IP addresses, which may indicate exploitation attempts.
4. Restrict Access: Limit access to administrative interfaces to trusted networks and users to reduce the attack surface.
5. Implement Network Segmentation: Isolate critical systems to prevent lateral movement in the event of a compromise.
Broader Context
This development is part of a broader trend of increasing attacks on network security appliances. For instance, Fortinet has previously addressed multiple vulnerabilities across its product portfolio, including FortiOS, FortiProxy, FortiManager, and FortiAnalyzer. These vulnerabilities have been exploited in the wild, emphasizing the need for continuous vigilance and proactive security measures.
Conclusion
The introduction of the Metasploit exploit module for FortiWeb vulnerabilities serves as a stark reminder of the evolving threat landscape. Organizations must prioritize the timely application of security patches, conduct regular security audits, and implement comprehensive monitoring to safeguard their systems against such sophisticated attacks.
