Cracking WEP Cloaking and 802.11 Non Public Band Comunication

In this talk Rick Farina a.k.a Zero Chaos and Thomas D'Otreppe a.k.a Mister X discuss the latest advancements in cracking WEP Cloaking and 802.11 non public band communication.

Mister X also releases Airdecloak-ng, a tool which removes the cloaked packets from a pcap file and thus allow aircrack-ng to break the key. Internally the logic is to identify these spoofed chaff packets by analyzing the sequence number and IV field. As Wep cloaked packets are necessarily data packets (at least in the current implementation according to Thomas) it is not possible for them to follow the sequence number or IV accurately, thus allowing for a very easy filtering. The Sequence number technique was first mentioned by Joshua Wright in his blog. Later that year Vivek Ramachandran and Amit Vartak from Airtight Networks demoed the first version of the WEP Cloaking cracker by modifying Aircrack-ng.

Farina on the other hand spoke about a very interesting topic - non public band communication using 802.11 . He points out that with minor tweaks to the driver code it is possible to listen and send on non public bands. However, he cautions everyone that even though listening on non public bands is allowed, transmission is punishable by US law. The slides to their Defcon 16 presentation is available here.  The video of their talk is embedded below.

Vivek Ramachandran is a security evangelist and has been working in computer security related fields for the past 7 years. In 2007, Vivek spoke at world renowned conferences Defcon (WEP Cloaking Exposed) and Toorcon (The Caffe Latte Attack). The discovery of the Caffe Latte Attack was covered by CBS5 news, BBC online, Network World etc news agencies.In 2006, Vivek was announced as one of winners of the Microsoft Security Shootout contest held in India among 65,000 participants. He has also been a recipient of a Team Achievement at Cisco Systems for his work on 802.1x and Port Security modules on the Catalyst 6500 switches. Currently he spends all of his time maintaining Security- Freak.Net , SecurityTube.Net and is the co-founder of Axonize. Vivek, is a Bachelor in Electronics and Communications Engineering from the prestigious Indian Institute of Technology, Guwahati.You can contact him at vivek[at]securitytube.net