CVE-2019-7721 Explained : Impact and Mitigation

The NCCms.class.php file in version 3.5 of nc-cms allows the uploading of .php files using specific parameters.

Understanding CVE-2019-7721

This CVE entry pertains to a vulnerability in the nc-cms version 3.5 that enables the upload of .php files through certain parameters.

What is CVE-2019-7721?

The vulnerability in the NCCms.class.php file of nc-cms version 3.5 allows malicious actors to upload .php files by manipulating the index.php?action=save name and editordata parameters.

The Impact of CVE-2019-7721

This vulnerability can lead to arbitrary code execution, potentially compromising the security and integrity of the affected system.

Technical Details of CVE-2019-7721

Vulnerability Description

The issue lies in the handling of file uploads in the NCCms.class.php file, which can be exploited to upload malicious PHP files.

Affected Systems and Versions

Affected Version: nc-cms 3.5

Exploitation Mechanism

Malicious actors can exploit this vulnerability by utilizing the index.php?action=save name and editordata parameters to upload malicious .php files.

Mitigation and Prevention

Immediate Steps to Take

Disable file uploads in the affected system if not essential.
Implement input validation to restrict file types that can be uploaded.
Regularly monitor and review uploaded files for any suspicious activity.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify and address vulnerabilities.
Keep systems and software up to date with the latest security patches.

Patching and Updates

Ensure that the nc-cms software is updated to a patched version that addresses the file upload vulnerability.