44CON Presentation - Additional Resources

Update December 2014: 44CON has posted the videos from all 2013 talks online. Unfortunately, they don't allow the videos to be embedded, so here's a link.

For my presentation at 44CON, entitled "Reversing and Exploiting BT CPE Devices", rather than have one or two or three slides packed with hard to read URLs, I included a single slide with a link to this post.  Here you'll find links to additional resources that I may have referenced in my talk.

White paper: Reverse Engineering and Exploiting the BT HomeHub 3.0b (pdf)

BT HomeHub 3.0b specifications

• http://forum.kitz.co.uk/index.php/topic,10161.msg213299.html#msg213299
• http://www.neufbox4.org/wiki/index.php?title=Neufbox_6#SoC_BCM6361
• http://www.hynix.com/inc/pdfDownload.jsp?path=/datasheet/pdf/graphics/H5PS5162FFR(Rev.1.4).pdf
• http://pdf1.alldatasheet.com/datasheetI pdf/view/94408/STMICROELECTRONICS/NAND256W3A2BN6/+7_4Q9UORlHDyRHOIpa/1XXyxeocP+uKxP6OXPaoV+ /datasheet.pdf

Here's a walkthrough I wrote on getting Debian MIPS Linux up and running in QEMU system emulation.  I use QEMU & Debian Linux to run and analyze binaries that I find in firmware.
QEMU/Debian MIPS Linux walkthrough

Often binaries found in firmware won't play nicely in emulation because they make a lot of assumptions about the underlying hardware which QEMU can't satisfy.  The most common case of this is an application querying NVRAM for configuration parameters.  Here's a library I wrote to intercept those queries and provide answers from an INI-style configuration file.
NVRAM "faker" library for use in emulation

Bowcaster is an exploit development API that I wrote to ease development of buffer overflow exploits.  It grew out of all the tools and techniques Craig Heffner and I developed for exploiting embedded devices.  It primarily targets MIPS Linux, since there support for that architecture was almost non-existent.  I plan to add support for other architectures as I have time.
Bowcaster

Here's my Github repository for proof-of-concept exploit code.  In it, you'll find the exploit code for the BT HomeHub 3.0b that I demoed at 44CON, among a few others.
Proof-of-Concept exploit code

I hope these resources are useful.  If you came to this article because you saw my 44CON talk and demo, I hope you enjoyed it!  Be sure to get in touch and share your thoughts!  Twitter or my email are best.

Twitter: @zcutlip
Email: uid000 at gmail

Cheers!
Zach

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