CVE-2023-34993 in FortiWLM
Summary
by MITRE • 10/25/2023
A improper neutralization of special elements used in an os command ('os command injection') in Fortinet FortiWLM version 8.6.0 through 8.6.5 and 8.5.0 through 8.5.4 allows attacker to execute unauthorized code or commands via specifically crafted http get request parameters.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 10/25/2023
This vulnerability represents a critical operating system command injection flaw in Fortinet FortiWLM products that directly enables remote code execution through improperly sanitized HTTP GET request parameters. The vulnerability exists within the web interface handling of user input, where specific command parameters are not adequately validated or escaped before being processed by underlying operating system commands. This allows attackers to inject malicious operating system commands that execute with the privileges of the web server process, potentially leading to full system compromise. The affected versions span FortiWLM 8.6.0 through 8.6.5 and 8.5.0 through 8.5.4, indicating a widespread issue affecting multiple release branches of the wireless LAN management platform.
The technical implementation of this vulnerability stems from insufficient input validation and sanitization within the web application layer of FortiWLM. When HTTP GET requests contain specially crafted parameters that are directly passed to system commands without proper escaping or filtering, attackers can manipulate the execution flow to inject arbitrary commands. This follows the classic command injection pattern where user-controllable input is concatenated into shell commands without proper neutralization. The vulnerability maps directly to CWE-77 which defines improper neutralization of special elements used in a command, and aligns with ATT&CK technique T1059.001 for command and scripting interpreter. The flaw specifically manifests when the application processes parameters that should only contain benign data but instead accept command sequences that get executed by the underlying operating system.
The operational impact of this vulnerability extends beyond simple code execution to encompass complete system compromise and potential lateral movement within network environments. An attacker who successfully exploits this vulnerability can execute arbitrary commands with the privileges of the web server process, which typically runs with elevated permissions on the system. This could enable attackers to install backdoors, exfiltrate sensitive data, modify system configurations, or use the compromised system as a pivot point for attacking other network resources. The vulnerability affects wireless LAN management capabilities, potentially allowing attackers to manipulate wireless network configurations, monitor traffic, or disrupt network services. Given that FortiWLM is designed for enterprise wireless network management, successful exploitation could impact large-scale deployments and enterprise security infrastructure, making this a particularly concerning vulnerability for organizations relying on Fortinet's wireless solutions.
Organizations should immediately implement mitigations including applying the latest Fortinet security patches and firmware updates that address this command injection vulnerability. Network segmentation and access control measures should be strengthened to limit exposure of the FortiWLM web interface to untrusted networks. Input validation should be enhanced at the application level to ensure all HTTP GET parameters are properly sanitized before processing, implementing proper escaping mechanisms and parameter validation. Monitoring should be implemented to detect suspicious HTTP GET requests containing command injection patterns, and security teams should conduct thorough vulnerability assessments of their wireless infrastructure. Additionally, implementing web application firewalls and input filtering mechanisms can provide additional defense-in-depth against similar injection attacks. The vulnerability demonstrates the critical importance of proper input validation and sanitization in web applications, particularly in enterprise security products where a single flaw can compromise entire network infrastructures.