~/talk

Intel ME: Flash File System Explained

Talkat Black Hat Europe 2017 · 2017-12-04..12-07· [security, embedded-and-hardware]
links:none on file
slides:none on file

Explains the ME 11.x on-flash layout with precise constants: 8 KB pages, every 12th page is a system page, 64-byte payload chunks, 120/122 chunks per page, two-byte CRC and a 52‑byte integrity trailer. Provides extraction tools (GitHub project to split images and a vendor FIT resource) and counts: up to 2056 file slots, SVN versions up to 3, and typical flash erase lifetimes. Key finding: a GEN partition allows deriving non-Intel keys so protected files can be decrypted and an ME-stored remote-access password was recovered.

AI-written summary · about

  1. 0:00Intro
  2. 3:24black hat ME Position in Computer System
  3. 5:18black hat MFS Partition Layout
  4. 6:19black hat Flash Memory Characteristics
  5. 7:55black hat Flash File System Design Goals
  6. 9:14black hat Recommended Materials
  7. 11:06black hat MFS Pagination
  8. 14:11black hat Page Chunks Single Chunk (66 bytes)
  9. 15:15black hat System Pages
  10. 17:35black hat Data Pages
  11. 18:31black hat Data Area Reconstruction
  12. 19:10black hat System Area Reconstruction
  13. 22:18black hat Data Extraction from Files
  14. 24:34black hat MFS Templates from fit.exe
  15. 26:41black hat Special Files
  16. 30:18black hat intel.cfg (fitc.cfg) Structure
  17. 32:51black hat intel.cfg Partial Dump
  18. 33:40black hat MFS Directory
  19. 36:46black hat Integrity, Encryption, Anti-Replay
  20. 39:57black hat FS Security Keys
  21. 43:09black hat Crypto Engine / Usage Practices
  22. 45:54black hat Key Derivation and Usage
  23. 49:52black hat File System Types in VFS
  24. 51:35black hat Black Hat Sound Bytes
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