Unauthenticated Popup File Uploader Scanner

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Asset Type

DOMAIN,IP,URL

Need Membership

Yes

Asset Verify

Yes

API Support

Yes

Estimate Time (Second)

5

Unauthenticated Popup File Uploader Scanner Detail

Popup Uploader includes an unauthenticated file upload vulnerability.

Various web applications allow users to upload files (such as pictures, images, sounds, ...). Uploaded files may pose a significant risk if not handled correctly. A remote attacker could send a multipart/form-data POST request with a specially-crafted filename or mime type and execute arbitrary code.

Some Advice for Common Problems

Restrict file types accepted for upload: check the file extension and only allow certain files to be uploaded. Use a whitelist approach instead of a blacklist. Check for double extensions such as .php.png. Check for files without a filename like .htaccess (on ASP.NET, check for configuration files like web.config). Change the permissions on the upload folder so the files within it are not executable. If possible, rename the files that are uploaded.

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