-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 10/12/2011 22:39, Michal Zalewski wrote: > At the risk of annoying everyone... > > I think we greatly underappreciate the extent to which JavaScript > allows you to exploit the limits of human perception. On modern > high-performance systems, windows can be opened, positioned, and > closed; and documents loaded and then navigated away from; so quickly > that we can't even reliably notice that, let alone react consciously. > > The PoC I posted here earlier this week > (http://lcamtuf.coredump.cx/switch/) demonstrates one example of page > transitions occurring so fast that you don't register it; and some of > my earlier posts outlined the exploitation of page switching to > exploit browser UIs (e.g. http://lcamtuf.coredump.cx/ffgeo2/). Today, > I wanted to share this brief demonstration of an attack that should > hopefully illustrate why our current way of thinking about > clickjacking (and the possible defenses, such as X-Frame-Options) is > flawed: > > http://lcamtuf.coredump.cx/clickit/ > > The basic idea here is that instead of placing the UI you want to > tamper with in an invisible or only partly-visible <iframe>, you can > achieve a similar effect simply by predicting the time of a > premeditated click (which is fairly easy if you look at mouse velocity > and distance to the expected destination), and then either destroying > the current window, or navigating to a different document (in this > case, a cheesy banking site). > > While everything about this exploit is extremely goofy, and I put no > effort into making the transitions less obvious, it should still > demonstrate the issue neatly. > > /mz > > _______________________________________________ > Full-Disclosure - We believe in it. > Charter: http://lists.grok.org.uk/full-disclosure-charter.html > Hosted and sponsored by Secunia - http://secunia.com/ >
Looks Like I won Michal. Where's my prize? Clever stuff. This kind of thing has occurred to me as system and indeed network/broadband speed have increased. One time a flashing of a neon on a router or modem or the a flash of a window on a desktop gave some indication of data ingress or egress. Nowadays it's done and over with before the user even realises something is afoot. I had to enable Javascript though. I guess I trust you not to burn my ass. There are not many links posted on this list which I would click with javascript enabled. Thanks for your insights and the education Dave -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEVAwUBTuPrVrIvn8UFHWSmAQJcJAgAqtAh+2LMzLOefwX31DZRNtoMgjWRt2yc 5CxN6uhnli97D9qJWDYOBYWJhO0/IV9zxmdVdQ5Pt+4LxPz2ollUFHbzD5vIWUd/ bYVE5x+cWgt8ZCRbJD5VNZcxYP4QsqRYlVspPcVjeVqKV26qYbCMPF83c/OtNiuR wZq/RmsJHrLWydFbNQfDGI/ufnwYLJEiH4GwqHxIjsajLOqBGztxPcWkIkfDDDQd tbPx49JF8e04aXqdAZlGxFV/sKTJVhaKsKPbUYiVGZF/vYbcFFO3eKF0s39hbBND 5rLH1qmEfzaC799bCZ/8tT/2/EA4xtZjJGrwzyNjA84eEL0J9g2PCw== =10aN -----END PGP SIGNATURE----- _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/