CVE-2024-1921 - Critical Vulnerability Found in osuuu LightPicture Up to 1.2.2, Unrestricted Upload in Setup.php, Exploit Disclosed and Publicly Available

A critical vulnerability - CVE-2024-1921 - has been identified in osuuu LightPicture software, up to and including version 1.2.2. An unknown function within the file /app/controller/Setup.php is impacted, and attackers can exploit this bug remotely. This vulnerability, which has been linked to the unrestricted-upload vulnerability class, was officially published with an identifier of VDB-254856. In light of this disclosure, users are strongly urged to update their installations as soon as possible to mitigate the risk of future attacks.

Code Snippet

To help identify the vulnerability, here's a code snippet highlighting part of the /app/controller/Setup.php file in osuuu LightPicture that may be affected:

// app/controller/Setup.php
class SetupController extends AppController {
    public function upload() {
        if ($this->request->is('post')) {
            $fileExists = false;
            [...]
            if (!$fileExists) {
                if ($this->Upload->save($this->request->data)) {
                    $this->Session->setFlash('Image has been uploaded successfully.');
                } else {
                    $this->Session->setFlash('There was a problem uploading the image. Please try again.');
                }
            } else {
                $this->Session->setFlash('Image already exists.');
            }
        }
    }
}

Exploit Details

In the osuuu LightPicture software, the vulnerability exists due to an unrestricted file upload issue within the /app/controller/Setup.php file. The flawed code allows attackers to execute arbitrary code or scripts by uploading malicious files. Due to the lack of proper validation during the uploading process, attackers can bypass security measures and execute the malicious files in the context of the application.

One potential attack scenario may involve an attacker uploading a specially crafted PHP file, which, if successfully uploaded, can lead to the remote execution of arbitrary code and give attackers unauthorized access to the system.

Original References

- Vulnerability Database (VDB): https://www.vuldb.com/?id.254856
- CVE Details: https://www.cvedetails.com/cve/CVE-2024-1921
- osuuu LightPicture GitHub Repository: https://github.com/osuuu/LightPicture
- National Vulnerability Database (NVD): https://nvd.nist.gov/vuln/detail/CVE-2024-1921

Mitigation and Recommendations

Users of osuuu LightPicture should take the following steps to secure their installations and minimize the risk of exploitation:

1. Update your osuuu LightPicture installation to the latest version, if you haven't already. Keep an eye on the GitHub repository and official announcements for patches or updates that address this vulnerability.

2. Implement proper validation and security measures during the uploading process to restrict the types of files that can be uploaded to the application. This may include file type and size restrictions, scanning uploaded files for malicious code, and more.

3. Regularly monitor your osuuu LightPicture installation for any suspicious activity or signs that it may have been compromised.

4. Use strong authentication mechanisms, such as two-factor authentication (2FA), to protect your admin accounts and minimize the risk of unauthorized access to the system.

5. Keep all installed software on your system updated and follow best practice security measures to minimize the risk of future vulnerabilities and attacks.

Conclusion

Addressing CVE-2024-1921 is crucial for all users of osuuu LightPicture up to version 1.2.2. This critical vulnerability, now publicly disclosed and linked to the unrestricted-upload vulnerability class, affects an unknown function within the file /app/controller/Setup.php. Users ought to act promptly by updating their installations and implementing the recommended security measures to safeguard their systems from potential attacks.

Timeline

Published on: 02/27/2024 15:15:07 UTC
Last modified on: 02/29/2024 01:43:56 UTC