Simon Willison’s Weblog

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Clickjacking and NoScript (via) NoScript CAN protect against clickjacking, but only if you enable the “Plugins|Forbid IFRAME” option. # 7th October 2008, 11:05 am

Dealing with UI redress vulnerabilities inherent to the current web (via) The best explanation of clickjacking I’ve seen yet, complete with discussion of a number of non-ideal potential solutions. It looks like frame busting JavaScript will defeat it, but only for users who have JavaScript enabled—which means that in this case extensions like NoScript actually make you less safe. UPDATE: NoScript is smarter than I thought; see the comments. # 7th October 2008, 9:59 am

This Week in HTML 5—Episode 7: Clickjacking. Clickjacking is when a third party site is embedded in an iframe with opacity 0 and positioned such that a click on the page actually hits a button on the now invisible third party site. Mark Pilgrim explains how the NoScript site uses this in a non malicious way to for the “install now!” button. # 1st October 2008, 1:48 am

In the long term, I want to replace JavaScript and the DOM with a smarter, safer design. In the medium term, I want to use something like Google Gears to give us vats with which we can have safe mashups. But in the short term, I recommend that you be using Firefox with No Script. Until we get things right, it seems to be the best we can do.

Douglas Crockford # 7th November 2007, 3:36 pm