![]() Secondly, the password to the FileVault encrypted disk is stored in clear text in memory, even when the computer is in sleep mode or locked. ![]() It's because the Mac EFI or Extensible Firmware Interface (similar to a PC's BIOS) let devices plugged in over Thunderbolt to access memory without enabling DMA protections, which allows Thunderbolt devices to read and write memory. ![]() The first issue is that the Mac system does not protect itself against Direct Memory Access (DMA) attacks before macOS is started. The researcher devised this technique by exploiting two designing flaws he discovered last July in Apple's FileVault2 full-disk encryption software. Here's How an Attacker can steal your Mac FileVault2 Password So, next time when you leave your Apple's laptop unattended, be sure to shut it down completely rather than just putting the system in sleep mode or locked.
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