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The Epitome of WTF: A researcher known as "Nightmare-Eclipse" recently released YellowKey, a security vulnerability that allegedly enables a full bypass of BitLocker's full-volume encryption. The researcher described YellowKey as one of the most "insane" flaws they have ever encountered and has also accused Microsoft of potentially embedding a legitimate backdoor in BitLocker's data protection system.

According to the researcher, YellowKey appears unusual for a previously unknown security bug. Nightmare-Eclipse explained that the flaw can be reproduced by copying an attached "FsTx" folder to a USB drive formatted with a Windows-compatible file system such as NTFS, FAT32, or exFAT.

The vulnerability may also work without a USB drive if the FsTx files are copied to the Windows EFI partition and the encrypted disk is temporarily disconnected from the system.…