Evil Maid Just Got Angrier - Why Full-Disk Encryption ... - CanSecWest

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Unified Extensible Firmware Interface (UEFI) CPU reset vector in ROM → Startup/Security Phase (SEC) → Pre-EFI Initialization (PEI) Phase (chipset/CPU initialization) → Driver Execution Environment (DXE) Phase → OEM UEFI applications (diagnostics, update) → Boot Device Selection (BDS) Phase → UEFI Boot Manager OS Boot Manager / Loader or Built-in UEFI Shell
Security of UEFI BIOS UEFI provides framework for signing UEFI binaries including native option ROMs Signed capsule update Framework for TCG measured (trusted) boot UEFI 2.3.1 defines secure (verified, authenticated) boot Protected configuration (authenticated variables, boot-time only..) SEC+PEI encapsulate security critical functions (recovery, TPM init, capsule update, configuration locking, SMRAM init/protection..)
Page 1: Evil Maid Just Got Angrier Why Full
Page 4 and 5: Outline 1 UEFI BIOS 2 Measured/Trus
Page 12 and 13: Legacy BIOS CPU Reset vector in ROM
Page 14 and 15: Legacy BIOS CPU Reset vector in ROM
Page 16 and 17: Security of Legacy BIOS Huh?
Page 20 and 21: So is UEFI BIOS secure? UEFI specif
Page 24 and 25: Windows BitLocker http://technet.mi
Page 26 and 27: Typical Chain of Measurements
Page 28 and 29: Typical Chain of Measurements ⊗ I
Page 44 and 45: The Problem Startup UEFI BIOS firmw
Page 46 and 47: The Solution is Simple Just let Bit
Page 54 and 55: SPI Flash / BIOS Protections 1 Writ
Page 56 and 57: SPI Protected Range Registers http:
Page 60 and 61: Hey! We’ve Succeeded!
Page 62 and 63: NIST BIOS Protection Guidelines Rec
Page 64 and 65: UEFI Updates Aren’t Exactly Signe
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Angry Evil Maid Attack Outline Agai
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The Original Boot Block
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Writing Payload to Early BIOS in SP
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But That P67 Board Is Just Too Old
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ASUS P8Z77-V PRO Yes! UEFI BIOS upd
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Demo The problem applies to any Ful
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What About Secure Boot? UEFI 2.3.1
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Outline 1 UEFI BIOS 2 Measured/Trus
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BIOS Rootkits BIOS Rootkit [5,6,7,1
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Anything We Can Do? If you care abo
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Further Reading 1 Evil Maid goes af
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Evil Maid Just Got Angrier - Why Full-Disk Encryption ... - CanSecWest

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