GIAC Foundational Cybersecurity Technologies Practice Test

Which security method can reduce risks associated with file uploads?

1. Allow all file types

2. Implement strict file type validation

3. Use a single upload directory

4. Automatically process every file uploaded

The correct answer is: Implement strict file type validation

Implementing strict file type validation is crucial in reducing the risks associated with file uploads. This method involves checking the type of file that a user is attempting to upload and ensuring it conforms to a predetermined list of acceptable file types. By validating the file types against a whitelist of safe formats (such as images or documents), organizations can significantly minimize the risk of malicious files being uploaded to their systems. Allowing all file types can expose the system to various threats, such as uploading executable files that could contain malware. Using a single upload directory might help organize files, but it doesn't address potential risks associated with the file contents themselves. Automatically processing every file uploaded can lead to security vulnerabilities, as malicious files may be executed or further processed without adequate checks. By enforcing strict validations, organizations can protect themselves from common file upload vulnerabilities, such as remote code execution, file inclusion attacks, and other security threats that could arise from processing untrusted files. This proactive approach is essential in maintaining the integrity and security of the overall system.