CVE-2024-2406 in Server
Summary
by MITRE • 03/12/2024
A vulnerability, which was classified as critical, was found in Gacjie Server up to 1.0. This affects the function index of the file /app/admin/controller/Upload.php. The manipulation of the argument file leads to unrestricted upload. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-256503.
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Analysis
by VulDB Data Team • 01/23/2025
The vulnerability identified as CVE-2024-2406 represents a critical security flaw in Gacjie Server version 1.0 and earlier, specifically within the file upload functionality. This issue resides in the index function of the Upload.php controller located at /app/admin/controller/Upload.php, making it a prime target for attackers seeking to compromise the system through unauthorized file uploads. The vulnerability's classification as critical indicates the severe potential impact on system security and data integrity, as it allows for unrestricted file upload capabilities that can be exploited without requiring authentication or specialized privileges.
The technical flaw stems from inadequate input validation and sanitization within the file upload process, specifically in how the system handles the file argument parameter. When an attacker manipulates this parameter, the system fails to properly validate file types, sizes, or content, enabling the upload of malicious files including web shells, scripts, or other harmful executables. This vulnerability falls under CWE-434 which specifically addresses "Unrestricted Upload of File with Dangerous Type," a well-documented weakness that has been exploited in numerous security incidents. The lack of proper file type checking and content verification creates an exploitable entry point that bypasses normal security controls designed to prevent malicious file execution.
The operational impact of this vulnerability is substantial and potentially devastating for systems running affected Gacjie Server versions. Attackers can remotely exploit this weakness to upload malicious files directly to the server, potentially gaining full control over the system or establishing persistent backdoors. This remote exploitation capability means that attackers do not need physical access or local network presence to compromise the system, making it particularly dangerous for web-facing applications. The disclosed exploit and public availability of attack vectors significantly increase the risk of widespread compromise, as malicious actors can immediately implement known techniques to leverage this vulnerability. The vulnerability's presence in an administrative controller further amplifies the risk, as successful exploitation could provide attackers with administrative privileges and complete access to sensitive data and system resources.
Organizations utilizing affected Gacjie Server installations should immediately implement mitigations including immediate patching or updating to versions that address this vulnerability. The recommended approach involves implementing strict file type validation, content inspection, and proper file upload sanitization mechanisms. Security measures should include restricting file upload capabilities to authorized users only, implementing comprehensive file type whitelisting, and conducting regular security audits of upload functionality. Additionally, network-level protections such as web application firewalls and intrusion detection systems should be configured to monitor and block suspicious upload attempts. The vulnerability's alignment with ATT&CK technique T1195.001 "Upload Malicious Code" highlights the need for comprehensive defensive measures that address both the technical flaw and potential attack vectors. System administrators should also consider implementing proper access controls, regular security assessments, and monitoring for unauthorized file upload activities to detect and respond to potential exploitation attempts effectively.