August 2007


Camp is over. Unfortunately I did not have enough spare time to write a in depth review, but I can say it was a lot of fun and very interesting. I didn’t enjoy the lectures very much, because the acoustic was lousy and the content of the lectures was not as good as I expected. But the concept of villages with people of same interests was very good. That way it was very easy to meet people with the same interests. One very interesting lecture was about the A5 Cracking Project. The projects goal is to implement a practical attack on the A5 cipher used in GSM networks. The cipher has already been broken in 1998 after the specs leaked into public because someone forgot to sign a NDA. But until now there is no public implementation of the attacks. There is a Wiki where the project is coordinated, check it out. That stuff is at the very top of my agenda. hmm, maybe not at the very top, but at the top ;-).

Anyway, due to the great atmosphere at the camp (especially during the night), I enjoyed it very much. Check out the flickr slideshow. I also made some photos, mostly night shots:
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Darkircop have released their tools for reverse engineering CSR Firmware. The tools include a disassembler dis.c for disassembling official firmware. An assembler as.cc for writing your own firmware is also included. With these tools you are now able to write your own firmware for your CSR based Bluetooth Dongle, which might even include raw access for Bluetooth sniffing. The source code for sniffing Bluetooth under Linux included, too.

It might even be possible to port the techniques for finding hidden Bluetooth devices described in this paper onto a CSR dongle. In the paper GNU Radio with USRP was used. The source code used for this attack can be downloaded, too.

Anonymous did send me some pictures of the Aircable Host XR. It has a CSR BC4 Chipset (CSR BC417-143BQN) and you can update its firmware. In combination with the SMA Connector for the antenna and its high sensitivity, this device might be an interesting BT-Sniffer.
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The new Bluetooth 2.1 specification has been made public today. You can download it now. Core features of the 2.1 spec:

  • Secure Simple Pairing
  • Reduced Power Consumption