[FD] Broken, Abandoned, and Forgotten Code, Part 12

Part 12 of Broken, Abandoned, and Forgotten Code is up. In this part, we encounter one last implementation bug in the Netgear R6200 UPnP daemon that threatens our hopes of exploitation: an invalid free() just after exploitation but before reboot. I walk you through an investigation of malloc() and free() to understand the crash. I also describe workaround to avoid the crash and reboot into our stage 1 payload. Here's a link to part 12: http://ift.tt/1izSPws If you missed my post to Full Disclosure where I introduced the series, here's that: http://ift.tt/1F6IUWA As always I welcome feedback via email or Twitter. I'm @zcutlip. I hope you enjoy it! Cheers, Zach

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