Battery Firmware Hacking - Hacker Halted

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Bricking is easy Lots of ways to brick the battery, here’s one way unseal(0x36720414); get_full_access(0xffffffff); // Enter BootROM mode write_word(kManufacturerAccess, 0xf00); // erase all instruction flash write_word(kSmb_FlashMassErase, 0x83de); // flash execute, i.e. run firmware send_byte(kFlashExecute); Sunday, October 2, 11
<strong>Firmware</strong> changes It might be interesting to see if we could change the way the battery responds to queries Things like RC, FCC, V, etc All the things queried have SBS command between 3 and 0x16 There is one function which handles these requests Sunday, October 2, 11
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Battery Firmware Hacking Charlie Mi
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About me Former US National Securit
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Spoiler I didn’t blow up batterie
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Smart battery “Safety is a primar
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Possible Battery Attacks Brick batt
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How to start I suck at hardware, so
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AppleSmartBattery Is part of PowerM
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One odd thing What’s up with 0x36
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Double win! We now know its some ki
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Double win! We now know its some ki
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Data flash signature SubclassID:byt
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Step 2 Sunday, October 2, 11
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Step 4 Chips and stuff Sunday, Octo
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Thx: Travis Goodspeed Sunday, Octob
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Sunday, October 2, 11
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Digression We now know what kind of
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Using the API Sunday, October 2, 11
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Lots to do! There are many interest
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Different modes Sealed Unsealed Ful
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Unsealed Access to Data Flash space
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Configuration mode By issuing SMBus
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Other calibrations? Sunday, October
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Other calibrations? Yes, I’m a pr
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q20z80evm-001 An evaluation system
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The software Sunday, October 2, 11
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Data flash Sunday, October 2, 11
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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
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: Implications Brick the battery Chan
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: More info Tools, slides, whitepaper
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Battery Firmware Hacking - Hacker Halted

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