Client-side JavaScript Vulnerabilities
The document discusses the evolution of client-side JavaScript and its related security vulnerabilities, particularly focusing on techniques such as DOM-based cross-site scripting and client-side open redirects. A significant finding is that 14.5% of analyzed web pages in a Fortune 500 study were found to have vulnerabilities, highlighting the growing risk as application logic shifts to client-sid
new XSS pattern with jQuery
XSS with $(location.hash) demo Click this link. It works on IE, Firefox, Chrome, Opera. In Safari, location.hash is percent encoded, not work. why? $("#id") is css selector, $("<img>") is createElement, and $("#<img>") is createElement too. how to fix in your library var hash = "#" + location.hash.replace(/[^\w]/g, ""); if ($(hash).size()) { ... } or patch to jQuery - quickExpr = /^(?:[^<]*(<[\w\W
Cross-window communication
The “Same Origin” (same site) policy limits access of windows and frames to each other. The idea is that if a user has two pages open: one from john-smith.com, and another one is gmail.com, then they wouldn’t want a script from john-smith.com to read our mail from gmail.com. So, the purpose of the “Same Origin” policy is to protect users from information theft. Same OriginTwo URLs are said to have
Cross-Domain Communication with IFrames
An update in the era of HTML5 (May 6, 2011) This post has been heavily commented and linked to over the years, and continues to receive a ton of traffic, so I should make it clear that much of this is no longer relevant for modern browsers. On the one hand, they have adjusted and tightened up their security policies, making some of the techniques here no longer relevant. On the other hand, they ha
window.nameによるクロスドメイン通信 - snippets from shinichitomita’s journal
随分前になるが、SitePenの人 (dojo) が書いたブログに window.nameを使ったクロスドメイン通信についてまとめられていた。 window.name Transport - Blog | SitePen 気になっていたがちゃんと読む時間がなかったので、今ごろ見てみる。抜粋して訳。 window.name による通信 The window.name transport is a new technique for secure cross-domain browser based data transfer, and can be utilized for creating secure mashups with untrusted sources. window.name is implemented in Dojo in the new dojox.io.windowN
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