Grant Hernandez

Hernan. Security researcher of embedded firmware and mobile devices..

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Hernan.de news digest

  • 6 years

    Moving a VMWare Fusion VM to a FAT32 External Hard Disk

    Backing up or moving a VMWare Fusion VM to an external hard drive is usually no problem - except when your destination filesystem is FAT-32.
    I use FAT-32 on my external drives for maximum compatibility between Mac, Windows and Linux. Unfortunately, FAT-32 is quite dated and doesn’t allow any file larger than 4GiB....

  • 6 years

    Lock and Load: Exploiting Counter Strike via BSP Map Files

    One night while playing Counter Strike: Condition Zero (CZ), I decided to take a break and challenge myself to find an exploitable bug in the old engine known as GoldSrc. Condition Zero, Half-Life 1, and CS 1.6 all run off of the GoldSrc engine, which...

  • 7 years

    CRC-32 VLSI Design Die Shots

    This is a follow up to myprevious post on creating a CRC-32 chip from scratch using Cadence. Check it out as it goes over the design details.
    tl;dr: see die shot images
    After submitting my CRC-32 design to MOSIS for fabrication, I had to wait quite a while for the results (over 6 months), but considering it was...

  • 8 years

    Google CTF 2016 - For2

    We are given a PCAPNG file with a bunch of USB packets. By scanning through the PCAP, I noticed that there appears to be a large amount of URB_INTERRUPT packets after some initial configuration and setup. On a hunch, I immediately suspected either a...

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Updated: November 28, 2019
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