Firesheep es un plug in diseñado por Eric Butler para Firefox que automatiza todo el proceso, y que brinda a cualquiera la posibilidad de hackear una cuenta Facebook.
El mismo eRIC EN SU SITIO NOS LO DESCRIBE
"Firesheep
When logging into a website you usually start by submitting your username and password. The server then checks to see if an account matching this information exists and if so, replies back to you with a "cookie" which is used by your browser for all subsequent requests.
It's extremely common for websites to protect your password by encrypting the initial login, but surprisingly uncommon for websites to encrypt everything else. This leaves the cookie (and the user) vulnerable. HTTP session hijacking (sometimes called "sidejacking") is when an attacker gets a hold of a user's cookie, allowing them to do anything the user can do on a particular website. On an open wireless network, cookies are basically shouted through the air, making these attacks extremely easy.
This is a widely known problem that has been talked about to death, yet very popular websites continue to fail at protecting their users. The only effective fix for this problem is full end-to-end encryption, known on the web as HTTPS or SSL. Facebook is constantly rolling out new "privacy" features in an endless attempt to quell the screams of unhappy users, but what's the point when someone can just take over an account entirely? Twitter forced all third party developers to use OAuth then immediately released (and promoted) a new version of their insecure website. When it comes to user privacy, SSL is the elephant in the room.
Today at Toorcon 12 I announced the release of Firesheep, a Firefox extension designed to demonstrate just how serious this problem is.
After installing the extension you'll see a new sidebar. Connect to any busy open wifi network and click the big "Start Capturing" button. Then wait.
As soon as anyone on the network visits an insecure website known to Firesheep, their name and photo will be displayed:
Double-click on someone, and you're instantly logged in as them.
That's it.
Firesheep is free, open source, and is available now for Mac OS X and Windows. Linux support is on the way.
Websites have a responsibility to protect the people who depend on their services. They've been ignoring this responsibility for too long, and it's time for everyone to demand a more secure web. My hope is that Firesheep will help the users win."
Lo único que hace falta es instalar el plugin, conectarse a una red WiFi y esperar que algún desprevenido usuario use la misma red para conectarse a Facebook.
No deberíamos usar servicios que no sean estrictamente HTTPS cuando usamos un WiFI público.
Firesheep es gratuito, open source, y funciona en todo sistema donde funcione Firefox. En Windows hace falta tener instaladas las librerías Winpcap para capturar el tráfico WiFi
http://codebutler.com/firesheep
Comentario:Me quedo con la reflexion de Eric "Los sitios web tienen la responsabilidad de proteger a las personas que dependen de su servicio. Esta responsabilidad ha sido ignorada por mucho tiempo, y ha llegado la hora de que todos demandemos una web mejor y mas segura. Mi esperanza es que "Disparemos a la Oveja" ayude a los usuarios a ganar"
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