October 2016
Intermediate to advanced
298 pages
5h 49m
English
Content preview from Mastering Modern Web Penetration TestingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 6. File Upload Vulnerabilities
This chapter will deal with security issues related to file upload. I bet the readers must have encountered web applications in which there is a functionality to upload files, commonly in the form of an image, video, documents, and so on. However, if a web application has poor (or no) security mechanisms to prevent certain kinds of files, such as server-side scripting, then that can result in arbitrary code execution on the server. Even with limited file upload capability, we can execute arbitrary JS (XSS), CSRF, and run client-side exploits.
Let's go straight to our first demonstration of a file upload vulnerability through Damn Vulnerable Web Application (DVWA)—an open source PHP web application developed ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.