These files are the older archived version that were used to update the Secure Boot Forbidden Signature Database, dbx. It contains the raw bytes passed in *Data to SetVariable()... an EFI_VARIABLE_AUTHENTICATION_2 concatenated with the new variable value. Example usage: SetVariable( "dbx", EFI_IMAGE_SECURITY_DATABASE_GUID, NV+BS+RT+AT+AppendWrite, dbxUpdateDotBin_sizeInBytes, *dbxUpdateDotBin_bytes). dbxupdate.bin already contains a Microsoft KEK signature (encoded as specified by the UEFI spec).
For the most recent UEFI Revocation List Files, please visit: https://uefi.org/revocationlistfile
UEFI Revocation List files contain the, now-revoked, signatures of previously approved and signed firmware and software used in booting systems with UEFI Secure Boot enabled. They are to be used only as described in the terms below. Distribution of the data in these files to running systems could cause instability and should only be attempted by security experts and IT professionals. System OEMs can use these files to test their platform firmware.
HP Inc. has provided the following comment.
“Specific HP commercial PCs may require a BIOS update before the dbx database can be updated. HP has released a customer advisory here that describes the issue, lists the affected models and points to updated BIOS versions that address this issue.”
Prior Versions of DBX Files
Release Date: October 12, 2020
UEFI Revocation List File for x64– available for download here
Release Date: July 29, 2020
One file for each of the following processor architectures:
UEFI Revocation List File for x86 (32 bit) – available for download here
UEFI Revocation List File for x64 (64 bit) – available for download here
UEFI Revocation List File for arm64– available for download here
Release Date: August 11, 2014
UEFI Revocation List File – available for download here
By downloading the UEFI Revocation List file ("UEFI Revocation List") from this website (www.uefi.org), you agree to the following terms. If you do not accept them, do not download or use the UEFI Revocation List.
These terms do not provide you with any legal rights to any intellectual property in any Microsoft product.
You may copy and use the UEFI Revocation List for your internal, reference purposes and to design, develop, and test your software, firmware or hardware, as applicable; and you may distribute the UEFI Revocation List to end users solely as part of the distribution of an operating system software product, or as part of the distribution of updates to an operating system product; and you may distribute the UEFI Revocation List to end users or through your distribution channels solely as embodied in a firmware product or hardware product that embodies nontrivial additional functionality. Without limiting the foregoing, copying or reproduction of the UEFI Revocation List to any other server or location for further reproduction or redistribution on a standalone basis is expressly prohibited.
If you are engaged in the business of developing and commercializing hardware products that include the UEFI standard, you may copy and use the UEFI Revocation List for your internal, reference purposes and to design, develop, and test your software; and you may distribute the UEFI Revocation List end users solely as part of the distribution of an operation system software product, or as part of the distribution of updates to an operation system software product. Without limiting the foregoing, copying or reproduction of the UEFI Revocation List to any other server or location for further reproduction or redistribution on a standalone basis is expressly prohibited.
The UEFI Revocation List is provided “as-is.” The information contained in the UEFI Revocation List may change without notice. Microsoft does not represent that the UEFI Revocation List is error free and you bear the entire risk of using it. NEITHER MICROSOFT NOR UEFI MAKES ANY WARRANTIES, EXPRESS OR IMPLIED, WITH RESPECT TO THE UEFI REVOCATION LIST, AND MICROSOFT AND UEFI EACH EXPRESSLY DISCLAIMS ALL OTHER EXPRESS, IMPLIED, OR STATUTORY WARRANTIES. THIS INCLUDES THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT.
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