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Ubuntu: USN-6355-1 (CVE-2022-28735): GRUB2 vulnerabilities

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Ubuntu: USN-6355-1 (CVE-2022-28735): GRUB2 vulnerabilities

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
07/20/2023
Created
09/18/2023
Added
09/18/2023
Modified
10/23/2024

Description

The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.

Solution(s)

  • ubuntu-upgrade-grub-efi-amd64
  • ubuntu-upgrade-grub-efi-amd64-bin
  • ubuntu-upgrade-grub-efi-amd64-signed
  • ubuntu-upgrade-grub-efi-arm64
  • ubuntu-upgrade-grub-efi-arm64-bin
  • ubuntu-upgrade-grub-efi-arm64-signed
  • ubuntu-upgrade-shim
  • ubuntu-upgrade-shim-signed

References

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