December 2015
Intermediate to advanced
232 pages
5h 8m
English
Content preview from Secure Your Node.js Web ApplicationBecome 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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Prevent XSS Through Configuration
Protecting against XSS is a challenge because there are many ways to get around the filters. You can derive large defensive benefits from configuration changes, so let’s begin there.
Proper configuration is the most generic, easiest, and often most useful part of mitigating XSS. The following options narrow the XSS vulnerability area and mitigate possible damages caused by malicious scripts.
The first step is to set the HttpOnly flag on cookies. We covered this flag in Secure the Cookies so No One Can Steal Them. Since the main aim of XSS is to hijack the user’s session, the script typically asks for document.cookie containing the sessionID and forwards it to the attacker. If you set the HttpOnly flag on ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.