Vulnerability

Update: The basic bug shown here is now fixed in Firefox. Read on to see whether the fix works for you. Keep in mind that there are much stronger attacks than the one shown here. Use private mode to reduce the amount of data your Browser keeps. What’s not there cannot be claimed.

After the example of making-the-web, I was quite intrigued by the ease of sniffing the history via simple CSS tricks.

So I decided to test, how small I get a Python program which can sniff the history via CSS - without requiring any scripting ability on the browser-side.

I first produced fully commented code (see server.py) and then stripped it down to just 64 lines (server-stripped.py), to make it really crystal clear, that making your browser vulnerable to this exploit is a damn bad idea. I hope this will help get Firefox fixed quickly.