GNU GRUB - Bugs: bug #56887, grub-PC check_signatures=enforce...
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bug #56887: grub-PC check_signatures=enforce support (non-EFI)
Submitter: | adrelanos <adrelanos> | ||
Submitted: | Fri 13 Sep 2019 06:09:43 AM UTC | ||
Category: | Security | Severity: | Major |
Priority: | 5 - Normal | Item Group: | Feature Request |
Status: | None | Privacy: | Public |
Assigned to: | None | Originator Name: | |
Open/Closed: | Open | Release: | 2.02~rc1 |
Release: | Reproducibility: | Every Time | |
Planned Release: | None |
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Depends on the following items: None found
Items that depend on this one: None found
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Date | Changed by | Updated Field | Previous Value | => | Replaced by |
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2019-09-13 | adrelanos | Carbon-Copy | - | Added adrelanos |
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Corresponding source code
Could you please make it possible to do signature verification with grub-pc too?
Rationale:
We, the maintainers of Linux distributions that primarily run inside VMs (Whonix; Kicksecure) would like to implement verified boot. Not necessarily Secure Boot.
At the moment, there are no tools that can create VM images (with Debian Linux) which support EFI booting. Also, support by virtualizers such as KVM, Xen, VirtualBox for Secure Boot is either non-existing or undocumented.
Another reason is, that inside VMs we don’t necessarily need the
complexity of EFI.
Instead we could boot unverified (usual virtual BIOS legacy boot) from a virtual, read-only (write protected) boot medium (such as ISO). That boot loader on the initial boot disk (grub2) could then verify and chainload the boot loader (grub2) on the main disk. Which then would go on to verify the kernel. In result, we would have a verified boot sequence.