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Fedora 33: FEDORA-2021-f6c91e2b75 Critical: Shim-Unsigned-X64 Threat

fedora
Calendar Grey April 28, 2021
Dist Fedora Esm H88
Important patch released for Fedora 33 to rectify vulnerabilities in the shim-unsigned-x64 bootloader, including step-by-step installation instructions.
Update to shim 15.4

Summary

Initial UEFI bootloader that handles chaining to a trusted full

bootloader under secure boot environments.

Update to shim 15.4

* Wed Apr 14 2021 Peter Jones - 15.4-5

- Fix the package version in the sbat data.

* Mon Apr 12 2021 Peter Jones - 15.4-4

- Fix mok variable storage allocation region

Resolves: rhbz#1948432

* Sat Apr 10 2021 Peter Jones - 15.4-3

- Fix handling of ignore_db and user_insecure_mode

- Fix booting on pre-UEFI Macs

* Wed Mar 31 2021 Peter Jones - 15.4-2

- Fix the ia32 build.

Resolves: CVE-2020-14372

Resolves: CVE-2020-25632

Resolves: CVE-2020-25647

Resolves: CVE-2020-27749

Resolves: CVE-2020-27779

Resolves: CVE-2021-20225

Resolves: CVE-2021-20233

* Tue Mar 30 2021 Peter Jones - 15.4-1

- Update to shim 15.4

- Support for revocations via the ".sbat" section and SBAT EFI variable

- A new unit test framework and a bunch of unit tests

- No external gnu-efi dependency

- Better CI

Resolves: CVE-2020-14372

Resolves: CVE-2020-25632

Resolves: CVE-2020-25647

Resolves: CVE-2020-27749

Resolves: CVE-2020-27779

Resolves: CVE-2021-20225

Resolves: CVE-2021-20233

* Wed Mar 24 2021 Peter Jones - 15.3-0~1

- Update to shim 15.3

- Support for revocations via the ".sbat" section and SBAT EFI variable

- A new unit test framework and a bunch of unit tests

- No external gnu-efi dependency

- Better CI

Resolves: CVE-2020-14372

Resolves: CVE-2020-25632

Resolves: CVE-2020-25647

Resolves: CVE-2020-27749

Resolves: CVE-2020-27779

Resolves: CVE-2021-20225

Resolves: CVE-2021-20233

su -c 'dnf upgrade --advisory FEDORA-2021-f6c91e2b75' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

All packages are signed with the Fedora Project GPG key. More details on the

GPG keys used by the Fedora Project can be found at

https://fedoraproject.org/security/

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Change Log

References

Update Instructions

Severity
critical
Lowest
Low
Medium
High
Critical

Product: Fedora 33
Version: 15.4
Release: 5.fc33
Summary: First-stage UEFI bootloader

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