Hydroph0bia – a fixed SecureBoot bypass for UEFI firmware based on Insyde H2O
4 hours ago
- #UEFI
- #Vulnerability
- #Security
- Hydroph0bia (CVE-2025-4275) vulnerability fix analysis.
- Only Dell has delivered BIOS updates fixing Hydroph0bia post-embargo.
- Lenovo and Framework confirmed vulnerability but provided delayed or no fix timelines.
- Insyde's fix involved changes to BdsDxe, SecurityStubDxe, and SecureFlashDxe drivers.
- SecureFlashDxe received significant updates including LibSetSecureVariable calls and VariablePolicy registration.
- Fix is conditionally sound but vulnerable to physical attacks like NVRAM manipulation.
- Insyde considered a more robust fix but faced regression issues, opting for an interim solution.
- Acknowledgements to Dell and Insyde teams for their collaboration and timely fixes.
- Future investigations planned on Acer Swift Go 16 for further Insyde H2O platform security analysis.