Shawn Merdinger gave a presentation on his personal research project covering the security of VoIP WiFi phones. For his initial investigation he is employing a “level one” methodology. These would be attacks from a low to medium skilled hacker, a hacker’s “first look” at the device: looking for open ports, finding developer left-overs, and misusing features. One thing that was common across all phones is how easily they succumb to DOS attacks. He talked about the issues with several specific phones. Many left open port 17185, which is the VxWorks database debug port. The favorite was the Clipcomm CPW-100E which provides unauthenticated access to debugging accounts letting you read call logs and even place calls, turning it into a remote listening device. You can hear Shawn talk about his project on Blue Box Podcast #13. Blue Box also has a copy of Shawn’s detailed slides. Here’s a list of the new phone security threats released a Shmoocon.

Continue reading “Shmoocon 2006: VoIP WiFi Phone Security Analysis” →

kaos.theory’s Anonym.OS was probably the most widely covered project to come out of this year’s Shmoocon. This was spurred by Wired’s article which was picked up by Slashdot, Ars, and others. Anonym.OS is a live CD based on OpenBSD 3.8 that provides anonymous internet access and aims to be usable by anyone. On the network it appears as a Windows machine to hide among the majority of internet users. The CD does several things to protect the user, starting with secure operating system. The main component is Tor, which we’ve covered before, All traffic is sent through Tor and since the disk uses local DNS look-up you don’t have to worry about DNS requests leaking. I really like this project because kaos.theory has done all of the dirty work like setting up really strict packet filter rules and forcing everything through Tor. Of course, I would have liked it even if it was just an OpenBSD live CD that used Fluxbox. The only two apps it has now are Firefox and GAIM. They are taking suggestions for what to add in the future and will probably be adding cryptographic filesystem support so that users can save safely. If they added Gimp and a hard drive install script I would be using this at every con I attended.

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If you payed attention to the comments on our story about a Magnetic stripe card emulator you would have seen Abend announce his Shmoocon talk. It was a pretty interesting talk about the basics of mag cards and some of the tricks employed by companies to obfuscate the data. To get the feel for the talk I suggest you listen to SploitCast #004 which features Abend as a guest. That combined with his slides and tools should give you a fine crash course in the technology. He also recommend’s Count Zero’s “A Day in the Life of a Flux Reversal“. Billy Hoffman, who did the Covert Crawler, has also worked with mag stripes and developed the program Stripe Snoop.

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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.

Continue reading “Shmoocon 2006: Wi-Fi Trickery Or How To Secure, Break And Have Fun With Wi-Fi” →