Franck Veysset and Laurent Butti, both from France Telecom R&D, presented several proof-of-concept tools at Shmoocon that use 802.11 raw injection. The first is Raw Fake AP. The original Fake AP is a script that generates thousands of fake access points. It is easy to spot because of tell-tale signs like the BSSID showing the AP has only been up for a couple milliseconds. Raw Fake AP tries to generate legitimate access points by modifying BSSIDs and sending beacon frames at coherent time intervals.
Raw Glue AP is designed catch probe requests from clients scanning for a preferred ESSID. It then tries to generate the appropriate probe responses to keep the client occupied.
Raw Covert was the final tool. It creates a covert channel inside of valid ACK frames. ACK frames are usually considered harmless and ignored by wireless IDS. The tool is really basic right now, there is no encryption and it doesn’t handle dropped frames.