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PRACTITIONER

File upload vulnerabilities

In this learning path, you'll explore how simple file upload functions can become a vector for severe attacks. You'll learn how to bypass common defense mechanisms to upload a web shell, enabling full control over a vulnerable web server.

Contents

Get started: What are file upload vulnerabilities?

0 of 35

GET STARTED

What are file upload vulnerabilities? 0 of 1

What are file upload vulnerabilities? Get started

What is the impact of file upload vulnerabilities? 0 of 2

What is the impact of file upload vulnerabilities?

What is the impact of file upload vulnerabilities? - Continued

How do file upload vulnerabilities arise? 0 of 1

How do file upload vulnerabilities arise?

How do web servers handle requests for static files? 0 of 2

How do web servers handle requests for static files?

How do web servers handle requests for static files? - Continued

Exploiting unrestricted file uploads to deploy a web shell 0 of 2

Exploiting unrestricted file uploads to deploy a web shell

Lab: Remote code execution via web shell upload APPRENTICE

Exploiting flawed validation of file uploads 0 of 5

Exploiting flawed validation of file uploads

Flawed file type validation

Flawed file type validation - Continued

Flawed file type validation - Continued

Lab: Web shell upload via Content-Type restriction bypass APPRENTICE

Preventing file execution in user-accessible directories 0 of 3

Preventing file execution in user-accessible directories

Preventing file execution in user-accessible directories - Continued

Lab: Web shell upload via path traversal PRACTITIONER

Insufficient blacklisting of dangerous file types 0 of 7

Insufficient blacklisting of dangerous file types

Overriding the server configuration

Overriding the server configuration - Continued

Lab: Web shell upload via extension blacklist bypass PRACTITIONER

Obfuscating file extensions

Obfuscating file extensions - Continued

Lab: Web shell upload via obfuscated file extension PRACTITIONER

Flawed validation of the file's contents 0 of 3

Flawed validation of the file's contents

Flawed validation of the file's contents - Continued

Lab: Remote code execution via polyglot web shell upload PRACTITIONER

Exploiting file upload race conditions 0 of 4

Exploiting file upload race conditions

Exploiting file upload race conditions - Continued

Race conditions in URL-based file uploads

Race conditions in URL-based file uploads - Continued

Exploiting file upload vulnerabilities without remote code execution 0 of 3

Exploiting file upload vulnerabilities without remote code execution

Uploading malicious client-side scripts

Exploiting vulnerabilities in the parsing of uploaded files

Uploading files using PUT 0 of 1

Uploading files using PUT

How to prevent file upload vulnerabilities 0 of 1

How to prevent file upload vulnerabilities