Battery Firmware Hacking - Hacker Halted

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Smart batteries Have an embedded controller which communicate with the charger and host Has a responsibility to maintain safety Can be configured for different parameters/chemistries Sunday, October 2, 11
Possible <strong>Battery</strong> Attacks Brick battery on victim Reprogram to remove safety features and allow explosion (thermal runaway)??? Persistent DOS to OS Persistent backdoor to OS (requires kernel bug) TPM, BIOS sniffer 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: Smart battery “Safety is a primar
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 and 50: Other calibrations? Yes, I’m a pr
Page 51 and 52: q20z80evm-001 An evaluation system
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
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Introspection Wrote a PyDbg script
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Google again Googling these types o
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Boot ROM - mostly ok See how to wri
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Let’s ask TI! Sunday, October 2,
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Plz! Sunday, October 2, 11
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Intellectual property - Here I come
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Intellectual property - Here I come
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3 byte aligned Probably 3 byte alig
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3 byte aligned Probably 3 byte alig
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The end Ends in 23 ff ff Then lots
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Back to google Sunday, October 2, 1
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CoolRISC 816 8-bit micro controller
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Instruction set Sunday, October 2,
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IDA! Create a few small sections, o
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More IDA Initial disassembly doesn
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Boot ROM Problems Now can dump and
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Battery wasteland Sunday, October 2
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Try an off-market knockoff Actually
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Problem 2 If you patch a few bytes
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Checksum checker (old) Sunday, Octo
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Disable checksum Older: Set stored
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Patch it! patch_firmware function p
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Sniffing SMBus Bought some (more) h
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Spaghetti wire fail Sunday, October
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Pop the keyboard Sunday, October 2,
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i2c decoding Write, SBS command 0x8
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Beagle data Sunday, October 2, 11
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Implications Brick the battery Chan
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Firmware changes It might be intere
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SMBus MITM Remaining Capacity (0xf)
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We redirect to cases 1b-1c int work
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Re-sniffing Shows all values querie
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Deal breaker? MU092X Thermal cutoff
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Fuzzing the SMBus Options Write a f
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Caulkgun source - guts #include #i
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Battery Firmware Hacking - Hacker Halted

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