CVE-2019-7216 Explained : Impact and Mitigation

A vulnerability has been found in FileChucker 4.99e-free-e02 that allows unauthorized users to bypass filters and upload files of any format by manipulating file extensions.

Understanding CVE-2019-7216

This CVE entry describes a flaw in the filechucker.cgi script that enables malicious users to upload files with any extension by using percentage characters.

What is CVE-2019-7216?

The vulnerability in FileChucker 4.99e-free-e02 allows attackers to bypass filters and upload files of any format by inserting percentage characters in the file extension.

The Impact of CVE-2019-7216

The vulnerability can be exploited by unauthorized users to upload malicious files, potentially leading to further compromise of the system and unauthorized access.

Technical Details of CVE-2019-7216

This section provides more technical insights into the CVE.

Vulnerability Description

The filechucker.cgi script in FileChucker 4.99e-free-e02 has a filter bypass that permits the upload of any file type by using percentage characters within the file extension.

Affected Systems and Versions

Product: FileChucker 4.99e-free-e02
Vendor: N/A
Versions: N/A

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating file extensions with percentage characters, such as file.%ph%p, which can be interpreted as file.php.

Mitigation and Prevention

Protecting systems from CVE-2019-7216 requires immediate actions and long-term security practices.

Immediate Steps to Take

Disable file uploads until a patch is available.
Monitor file uploads for suspicious activity.

Long-Term Security Practices

Implement input validation for file uploads.
Regularly update and patch FileChucker to address security vulnerabilities.
Educate users on safe file upload practices.

Patching and Updates

Check for security patches and updates from the official FileChucker website.
Apply patches promptly to mitigate the risk of exploitation.