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web application security lab

Halt IE7.0 Tab

While doing some tests I ended up writing a piece of JavaScript that has some weird effects. It is based off of the CSS history hack, but for some reason it causes MSIE7.0 to have some really funky hanging. Click here in IE7.0 only if you want to halt your tab. This only affects the tab you are currently on and it still allows you to open other tabs. But the tab you are on becomes unusable.

I’m not sure what this could be used for other than a simple DoS, but the weird part is this doesn’t affect the CPU or take up memory or anything that a normal DoS does, it just makes it unresponsive to doing anything within the tab. Weird, huh? Anyway, it was something I found a few weeks ago, but never got anything useful out of it.

8 Responses to “Halt IE7.0 Tab”

  1. Frederick Young Says:

    Seems to freeze IE6 as well.

  2. RSnake Says:

    Sorry, I should have made that more clear - I didn’t check any other browsers other than FF.

  3. Shawn Says:
  4. Shawn Says:
  5. Awesome AnDrEw Says:

    That was pretty cool. I tried navigating to Yahoo!, and the Favicon loaded, but the page is still “connecting”, and has been for two minutes.

  6. Ivan Says:

    Opera is immune …

  7. RSnake Says:

    More comments here:,11293

  8. Mal1024 Says:

    Weird. This actually crashed IE after about 1min of waiting.