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web app pentesting
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file upload vulnerabilities
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File Upload Vulnerabilities
Main Ideas
Overview
How do web servers handle requests for static files?
Exploiting unrestricted file uploads to deploy a web shell
Exploiting flawed validation of file uploads
Flawed file type validation
Preventing file execution in user-accessible directories
Insufficient blacklisting of dangerous file types
Overriding the server configuration
Obfuscating file extensions
Flawed validation of the file's contents
Exploiting file upload race conditions
Race conditions in URL-based file uploads
Exploiting file upload vulnerabilities without remote code execution
Uploading files using PUT
How to prevent file upload vulnerabilities
