New GreatXML Exploit Bypasses Windows BitLocker via Recovery Partition XML Files
New GreatXML exploit bypasses Windows BitLocker via recovery partition XML files.
Security researcher Chaotic Eclipse has released a new exploit named GreatXML that bypasses Windows BitLocker encryption. The exploit involves placing specific XML files on the recovery partition and rebooting into the Windows Recovery Environment (WinRE) to gain unrestricted access to the BitLocker volume. This bypass is reportedly triggered if Windows Defender Offline Scan has been used, or can be manually initiated.
AI summary of the linked source. Not reviewed by an editor. How this works
Run Windows BitLocker?
Get an email when a new story names Windows BitLocker, usually within the hour.
Free. Your list stays private and never appears in a subject line. One click stops it. How Vendor Watch worksPrivacy
The lesson from this incident
Full lessonThe GreatXML exploit demonstrates a critical flaw in Windows BitLocker's security model by manipulating XML files in the recovery partition to bypass full disk encryption. This attack vector exploits the trust relationship between the Windows Recovery Environment (WinRE) and BitLocker, allowing attackers with physical access to gain unrestricted access to encrypted volumes. The vulnerability is particularly concerning because it can be triggered through legitimate Windows Defender Offline Scan operations or manual initiation, making it both stealthy and accessible to attackers. This highlights the importance of comprehensive encryption strategies that consider all system components, not just the primary operating system.
What helps against this
How we list vendors
- Automated patch management
Known holes get closed in days, not months.
- Endpoint detection and response (EDR and XDR)
Malware and hands-on-keyboard attackers on laptops and servers get spotted and stopped.
- Encryption and key management
Stolen data stays unreadable, and the keys stay under your control.