CVE-2023-3797 in Four Mountain Torrent Disaster Prevention and Control of Monitoring and Early Warning System
Summary
by MITRE • 07/21/2023
A vulnerability, which was classified as critical, was found in Gen Technology Four Mountain Torrent Disaster Prevention and Control of Monitoring and Early Warning System up to 20230712. This affects an unknown part of the file /Duty/AjaxHandle/UploadFloodPlanFileUpdate.ashx. The manipulation of the argument Filedata leads to unrestricted upload. The exploit has been disclosed to the public and may be used. The identifier VDB-235065 was assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 08/15/2023
This critical vulnerability exists within the Gen Technology Four Mountain Torrent Disaster Prevention and Control Monitoring and Early Warning System version 20230712, specifically in the file /Duty/AjaxHandle/UploadFloodPlanFileUpdate.ashx which handles file upload functionality. The flaw stems from inadequate input validation and sanitization of the Filedata parameter, allowing attackers to bypass security controls and upload arbitrary files to the system. This represents a classic unrestricted file upload vulnerability that can be exploited to gain remote code execution capabilities and compromise the entire system. The vulnerability falls under CWE-434 which specifically addresses unrestricted upload of file with dangerous type, making it particularly dangerous as it allows for the upload of malicious executables or scripts that can be executed on the target server. The public disclosure of this exploit (VDB-235065) increases the risk significantly as attackers can readily leverage this weakness without requiring advanced technical skills or prior knowledge of the system's internal workings.
The operational impact of this vulnerability is severe and multifaceted, potentially enabling complete system compromise through remote code execution. Attackers can upload malicious files such as web shells, backdoors, or malware that can be executed with the privileges of the web server process, typically running with elevated permissions. This creates a persistent threat vector that can be used for data exfiltration, lateral movement within the network, and establishment of footholds for further attacks. The vulnerability aligns with ATT&CK technique T1190 (Exploit Public-Facing Application) and T1059 (Command and Scripting Interpreter) as it allows attackers to exploit a public-facing web application and execute malicious code. The lack of vendor response to early notifications compounds the risk, leaving organizations without official patches or mitigations to protect against this known threat.
Organizations affected by this vulnerability should implement immediate mitigations while awaiting official patches from the vendor. The most effective immediate controls include implementing strict file type validation on the server-side, restricting file extensions to only those necessary for legitimate operations, and implementing proper file validation mechanisms that check file content rather than relying solely on file extensions. Network-level protections should include firewall rules that restrict access to the vulnerable endpoint and implement web application firewalls to detect and block malicious upload attempts. The system should also be configured to store uploaded files outside the web root directory and ensure proper file permissions are enforced. Organizations should conduct thorough network monitoring to detect any suspicious file upload activities and implement logging mechanisms that track all file upload operations for forensic analysis. Additionally, implementing principle of least privilege access controls and regular security assessments will help minimize the potential impact of successful exploitation attempts.