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coreboot-kgpe-d16/util/me_cleaner/README.md

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ME cleaner

A cleaner for Intel ME/TXE images.

This tools removes any unnecessary partition from an Intel ME/TXE firmware, reducing its size and its ability to interact with the system. It should work both with coreboot and with the factory firmware.

Currently this tool:

  • Scans the FPT (partition table) and checks that everything is correct
  • Removes any partition entry (except for FTPR) from FPT
  • Removes any partition except for the fundamental one (FTPR)
  • Removes the EFFS presence flag
  • Corrects the FPT checksum
  • Removes any non-essential LZMA or Huffman compressed module from the FTPR partition (pre-Skylake only)
  • Relocates the remaining parts of the FTPR partition to the top of the ME region (pre-Skylake only)
  • Checks the validity of the RSA signature of the FTPR partition

Don't forget to power cycle your PC after flashing the modified ME/TXE image (power off and power on, not just reboot).

See the current status or a more detailed description of me_cleaner.

Special thanks to Federico Amedeo Izzo for his help during the study of Intel ME.