Battery Firmware Hacking - Hacker Halted

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Boot ROM mode Allows low level access to device, direct access to data flash and firmware bq20z80-V110 + bq29312A Chipset Technical Reference Manual does not document it Time to buy some hardware, sigh Sunday, October 2, 11
q20z80evm-001 An evaluation system for the bq20z80/bq2312a/ bq29400 smart battery chipset Almost exactly the chipset on the Apple Macbook battery Comes with Windows software to interact with it via USB Sunday, October 2, 11
Page 1 and 2: Battery Firmware Hacking Charlie Mi
Page 3 and 4: About me Former US National Securit
Page 5 and 6: Spoiler I didn’t blow up batterie
Page 7 and 8: Smart battery “Safety is a primar
Page 9 and 10: Possible Battery Attacks Brick batt
Page 11 and 12: How to start I suck at hardware, so
Page 13 and 14: AppleSmartBattery Is part of PowerM
Page 15 and 16: One odd thing What’s up with 0x36
Page 17 and 18: Double win! We now know its some ki
Page 19 and 20: Double win! We now know its some ki
Page 21 and 22: Data flash signature SubclassID:byt
Page 27 and 28: Step 2 Sunday, October 2, 11
Page 29 and 30: Step 4 Chips and stuff Sunday, Octo
Page 31 and 32: Thx: Travis Goodspeed Sunday, Octob
Page 33 and 34: Sunday, October 2, 11
Page 35 and 36: Digression We now know what kind of
Page 37 and 38: Using the API Sunday, October 2, 11
Page 39 and 40: Lots to do! There are many interest
Page 41 and 42: Different modes Sealed Unsealed Ful
Page 43 and 44: Unsealed Access to Data Flash space
Page 45 and 46: Configuration mode By issuing SMBus
Page 47 and 48: Other calibrations? Sunday, October
Page 49: Other calibrations? Yes, I’m a pr
Page 53 and 54: The software Sunday, October 2, 11
Page 55 and 56: Data flash Sunday, October 2, 11
Page 57 and 58: EVM It can flash the firmware with
Page 59 and 60: Introspection Wrote a PyDbg script
Page 61 and 62: Google again Googling these types o
Page 63 and 64: Boot ROM - mostly ok See how to wri
Page 65 and 66: Let’s ask TI! Sunday, October 2,
Page 67 and 68: Plz! Sunday, October 2, 11
Page 69 and 70: Intellectual property - Here I come
Page 71 and 72: Intellectual property - Here I come
Page 73 and 74: 3 byte aligned Probably 3 byte alig
Page 75 and 76: 3 byte aligned Probably 3 byte alig
Page 77 and 78: The end Ends in 23 ff ff Then lots
Page 85 and 86: Back to google Sunday, October 2, 1
Page 87 and 88: CoolRISC 816 8-bit micro controller
Page 89 and 90: Instruction set Sunday, October 2,
Page 91 and 92: IDA! Create a few small sections, o
Page 93 and 94: More IDA Initial disassembly doesn
Page 95 and 96: Boot ROM Problems Now can dump and
Page 97 and 98: Battery wasteland Sunday, October 2
Page 99 and 100: Try an off-market knockoff Actually
Page 101 and 102:
Problem 2 If you patch a few bytes
Page 103 and 104:
Checksum checker (old) Sunday, Octo
Page 105 and 106:
Disable checksum Older: Set stored
Page 107 and 108:
Patch it! patch_firmware function p
Page 109 and 110:
Sniffing SMBus Bought some (more) h
Page 111 and 112:
Spaghetti wire fail Sunday, October
Page 113 and 114:
Pop the keyboard Sunday, October 2,
Page 115 and 116:
i2c decoding Write, SBS command 0x8
Page 117 and 118:
Beagle data Sunday, October 2, 11
Page 119 and 120:
Implications Brick the battery Chan
Page 121 and 122:
Firmware changes It might be intere
Page 123 and 124:
SMBus MITM Remaining Capacity (0xf)
Page 125 and 126:
We redirect to cases 1b-1c int work
Page 127 and 128:
Re-sniffing Shows all values querie
Page 129 and 130:
Deal breaker? MU092X Thermal cutoff
Page 131 and 132:
Fuzzing the SMBus Options Write a f
Page 133 and 134:
Caulkgun source - guts #include #i
Page 135 and 136:
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