CVE-2024-57968 - Exploiting Advantive VeraCore's File Upload Vulnerability to Gain Unauthorized Access

A new vulnerability has been discovered in Advantive VeraCore before the 2024.4.2.1 version that allows remote, authenticated users to upload files to unintended folders, which could then be accessed by other users during web browsing. This post will explore the vulnerability, with details on the exploit, a code snippet to better understand the issue, and links to the original references.

The Vulnerability (CVE-2024-57968)

The CVE-2024-57968 vulnerability specifically targets the "upload.aspx" file in VeraCore, causing a logic flaw in how files are uploaded and managed within the application. This can provide attackers with an opportunity to upload malicious files to the application, including executables and scripts, which can then be accessed by other users and potentially compromise their systems or steal sensitive information.

The Exploit

To exploit this vulnerability, an attacker would need to be authenticated to the VeraCore system, either through stolen credentials or another security vulnerability, such as phishing. Once authenticated, the attacker could manipulate the web application's logic and upload files to locations that should not be accessible, typically under the guise of a necessary file, such as an image or PDF.

Here's a simplified code snippet to demonstrate the vulnerability in "upload.aspx"

public partial class Upload : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        // Logic to authenticate the user
        if (IsAuthenticated()) 
        {
            string filePath = Request.QueryString["path"];
            HttpPostedFile uploadedFile = Request.Files[];

            // Check and sanitize the file path
            if (filePath != null && IsValidPath(filePath))
            {
                // Perform the file upload to the desired folder
                string fullPath = Server.MapPath(filePath);
                uploadedFile.SaveAs(fullPath);
            }
        }
    }
}

In this example, the attacker could manipulate the "path" parameter to save their malicious files in a folder that is accessible by other users, bypassing the system's checks and restrictions.

Mitigation

To prevent this vulnerability from being exploited, it is strongly recommended that users of Advantive VeraCore update their software to version 2024.4.2.1 or later. This update ensures that the application properly sanitizes and validates file uploads, preventing unexpected behavior and unauthorized access to sensitive folders.

Additionally, enforcing proper access controls and user management within your organization can further reduce the risk of unauthorized users gaining access to the VeraCore application.

Original References

For more information on this vulnerability and the corresponding CVE entry, please refer to the following links:

- CVE-2024-57968 - Official CVE Details
- Advantive VeraCore Release Notes and Security Patch

Conclusion

The CVE-2024-57968 vulnerability presents a significant security risk to organizations using Advantive VeraCore before version 2024.4.2.1, as it allows an attacker to upload malicious files to unintended folders, which can lead to unauthorized user access and further exploitation. Users should ensure they are using the latest version of the software, and proper access controls are in place to prevent unauthorized users from exploiting this vulnerability.

Timeline

Published on: 02/03/2025 20:15:36 UTC
Last modified on: 02/06/2025 18:15:32 UTC