Firesheep.

Firesheep is a plugin for Firefox that is creating a lot of noise in the IT security community. It allows you to hijack sessions of other users on open wifi.

There is a windows/mac version of this plugin, but that is no use to me (and I will point out my intentions are NOT malicious, but to demonstrate to friends/colleagues the dangers of the interwebs).

thanks to information on this page I got it working on my 64-bit ubuntu 10.04(lucid) laptop.

here's what I did to get it working.
regards

Neil.

to install firesheep on lucid

1. get dependencies (your mileage may vary)

sudo apt-get install libhal-dev libtool autoconf xulrunner-dev libboost-dev libpcap-dev iw git

2. get the latest firesheep code from github

git clone git://github.com/mickflemm/firesheep.git

3. compile the firesheep.xpi "plugin"

cd firesheep

./autogen.sh

git submodule update --init

make

4. set up a monitor interface

sudo iw wlan0 interface add mon0 type monitor

sudo ifconfig mon0 up

5. Install the plugin into firefox.
Open Firefox, and from the menu choose "File", then open ~/firesheep/build/firesheep.xpi

restart firefox when asked

6. firesheep needs correct permissions to access your wifi card.

cd ~/.mozilla/firefox/7oyiuecg.default/extension/firesheep@codebutler.com/platform/Linux_x86_64-gcc3/

sudo ./firesheep-backend --fix-permissions

note- there WILL be subtle differences in this directory

7. Ready to go!

open firefox and click on
add-ons->firesheep->preferences->interface
then choose mon0 from the drop down list. (see screenshot below)

8. Enable the Firesheep Sidebar.

view->SideBar->firesheep;
(or ctrl-shift-s)

DONE!