Overview
A critical vulnerability has been discovered in KuWFi GC111 devices, specifically in Hardware Version: CPE-LM321_V3.2 and Software Version: GC111-GL-LM321_V3.0_20191211. This vulnerability allows remote attackers to execute arbitrary OS commands with root privileges, potentially leading to system compromise or data leakage. Considering the severity of the issue, and the potential impact on users of these devices, it is crucial to take immediate steps to mitigate the risk.
Vulnerability Summary
CVE ID: CVE-2025-43984
Severity: Critical (9.8 CVSS v3.0 Severity)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service
Affected Products
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Product | Affected Versions
KuWFi | GC111-GL-LM321_V3.0_20191211
How the Exploit Works
The vulnerability lies in the handling of /goform/goform_set_cmd_process requests by the KuWFi GC111 devices. These devices do not properly authenticate such requests. As a result, a remote attacker can send a specially crafted POST request using the SSID parameter to execute arbitrary OS commands with root privileges. This can lead to a complete system compromise or leakage of sensitive information.
Conceptual Example Code
A conceptual example of the exploit could look something like this:
POST /goform/goform_set_cmd_process HTTP/1.1
Host: target_device_ip
Content-Type: application/x-www-form-urlencoded
ssid=;reboot;In the above example, the attacker sends a POST request that includes a command (`reboot`) injected into the ssid parameter. This command would cause the target device to restart, demonstrating that the attacker can execute arbitrary commands.
Mitigation and Prevention
Users of the vulnerable versions of KuWFi GC111 devices should apply the patch provided by the vendor as soon as possible. In case the patch cannot be applied immediately, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can provide temporary mitigation. These systems can be configured to block or alert on requests to /goform/goform_set_cmd_process, helping to prevent exploitation of the vulnerability.