A couple of weeks ago, Eric Butler released the Firesheep addon for Firefox. The plugin took the Internet by storm and showed off how vulnerable your really are (if you haven’t heard of it, it allows any user to hijack the web session of another user on the same local network). Now though there is a way to protect yourself from the add0n.
“BlackSheep, also a Firefox plugin is designed to combat Firesheep. BlackSheep does this by dropping ‘fake’ session ID information on the wire and then monitors traffic to see if it has been hijacked. While Firesheep is largely passive, once it identifies session information for a targeted domain, it then makes a subsequent request to that same domain, using the hijacked session information in order to obtain the name of the hijacked user along with an image of the person, if available. It is this request that BlackSheep identifies in order to detect the presence of Firesheep on the network. When identified, the user will be receive the following warning message:”