A new BitLocker bypass allows access to encrypted drive in the pre-boot environment with all Windows security features enabled
Source Reddit Cybersecurity
Discussion
A newly reported bypass technique called 'bitskrieg' targets BitLocker encryption by exploiting the pre-boot recovery environment. This attack can access encrypted drives even when all standard Windows security features such as Secure Boot, Virtualization-Based Security (VBS), TPM, and BitLocker are enabled. The bypass builds on a previously known flaw named 'Yellowkey' and demonstrates that local data remains vulnerable if an attacker can manipulate pre-boot recovery environment transactions. No patch or official vendor advisory is currently available, and there is no evidence of exploitation in the wild. The information is sourced from a recent social media post referencing a blog, with minimal technical details and no direct vendor confirmation.
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A blog on X describing a new attack against BitLocker dubbed bitskrieg. This bypass follows a previous similar flaw known as "Yellowkey", and demonstrates that even with modern security defenses enabled, including Secure Boot, Virtualization-Based Security (VBS), TPM, and BitLocker, local data remains vulnerable if an attacker can manipulate the pre-boot recovery environment transactions.