(Cancelled) / Clickjacking - OWASP AppSec Talk

“Clickjacking,” the presentation Robert “RSnake” Hansen and I had planned for OWASP AppSec NY 2008, has been postponed due to vendor request.

The premise of Clickjacking is that we know a lot about what JavaScript malware is capable of once a user comes in contact with an attacker-controlled webpage (or a page with their code on it) such as history stealing, intranet hacking, phishing with superbait, Web worms, browser exploit, and so on, but comparably little about what can be done with a captured “click”. Clickjacking gives an attacker the ability to trick a user into clicking on something only barely or momentarily noticeable. What could they possibly do then?

With Clickjacking attackers can do quite a lot. Some things that could be pretty spooky. Things also performed, with a fair amount of ingenuity, quite easily. Over the past couple of weeks/months RSnake and I have been completing our PoC examples to demonstrate the potential attacks and sharing the results privately with a few industry colleagues to obtain a third-party opinion. At the time, we believed our discoveries were more in line with generic Web browsers behavior, not traditional “exploits,” and that guarding against Clickjacking was largely the browser vendors' responsibility. Clickjacking is a well-known issue, but severely underappreciated and largely undefended, and we hope to begin changing that perception.

One Clickjacking PoC utilized an Adobe product with an attack technique they considered to be a critical issue, we just hadn’t realized it, so we narrowly avoided 0-day’ing them! Considering the short notice, Adobe requested additional time in case the browser vendors do nothing to prevent Clickjacking. High severity issue #2 in Internet Explorer 8 would have potentially given the aforementioned issue persistent qualities. There was/is a third issue with websites in general, which would have required all website owners to make an update, but that would obviously be impossible to do so. Again, better fixed by the browser vendors. With much of our technical details taken off the table waiting for patches and/or new safeguards we weren’t left with much to convey the true power of Clickjacking other than what’s already known.

Postponing our OWASP talk wasn’t an easy decision to make as we put a lot of time and effort into the presentation. We apologize to the attendees and had every intention of releasing mind-blowing stuff. At this time just about everyone out there using the latest versions of Internet Explorer (including version 8) and Firefox 3 is affected. Please be assured that as soon as we’re able to expose the information we will do so. In the meantime, the only fix is to disable browser scripting and plugins. We realize this doesn’t give people much technical detail to go on, but it’s the best we can do right now.

Adobe PSIRT (psirt@adobe.com)

More to come.