A critical vulnerability, identified as CVE-2024-2406, has been discovered in the Gacjie Server software for versions up to 1.. This vulnerability affects the "index" function of the file /app/admin/controller/Upload.php, and it allows remote attackers to upload unrestricted files. The manipulation of the "file" argument leads to this unrestricted upload, posing significant threats to affected systems. The vulnerability has the associated identifier VDB-256503, and it has been publicly disclosed, which means bad actors could take advantage of it.

To illustrate the vulnerability, here is a snippet of code from the affected file

public function index() {
    if ($_POST) {
        $File = $this->request->param('file');
        ...
        move_uploaded_file($File['tmp_name'], $destination . $filename);

As shown in the code above, the "index" function doesn't validate the uploaded file's type or size. The $File variable directly obtains the file name, allowing attackers to upload potentially malicious files onto the server without any restrictions.

1. Original disclosure: CVE Details
2. Mitre Database: MITRE CVE-2024-2406
3. National Vulnerability Database: NVD CVE-2024-2406

Exploit Details

The vulnerability is exploitable remotely, which means that an attacker doesn't need physical access to the affected server. By manipulating the "file" argument of the "index" function, an attacker can upload unrestricted files, including those that contain malicious code. This could potentially lead to unauthorized access to the server, data theft, server takeover, or even a large-scale attack if the malicious file can spread to other connected systems.

Moreover, the public disclosure of this vulnerability enables malicious actors to access information about the exploit and use it for their purposes. Due to the nature of publicly disclosed vulnerabilities, it's essential to take immediate action to protect any servers running the affected Gacjie Server software.

If you're running Gacjie Server up to version 1., it's critical to address this vulnerability as soon as possible. The following steps are recommended:

Temporarily disable the file uploading feature while waiting for a fix or update.

3. Implement proper input validation and access control mechanisms to secure the "index" function within the affected file.
4. Regularly monitor your server logs to identify any suspicious or unauthorized activities, and report them to the appropriate authorities.

Conclusion

The CVE-2024-2406 vulnerability poses significant risks to the Gacjie Server software, as it enables remote attackers to exploit the unrestricted file upload feature. Ensuring that your server software is up-to-date and implementing proper security measures are essential steps to mitigate this vulnerability's impacts. Stay vigilant, and always prioritize the security of your systems and networks.

Timeline

Published on: 03/12/2024 21:15:59 UTC
Last modified on: 04/11/2024 01:25:23 UTC