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Ubuntu: (Multiple Advisories) (CVE-2020-15705): GRUB 2 vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2020-15705): GRUB 2 vulnerabilities

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
07/29/2020
Created
08/07/2020
Added
08/05/2020
Modified
03/22/2023

Description

GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions.

Solution(s)

  • ubuntu-upgrade-grub-efi-amd64-bin
  • ubuntu-upgrade-grub-efi-amd64-signed
  • ubuntu-upgrade-grub-efi-arm-bin
  • ubuntu-upgrade-grub-efi-arm64-bin
  • ubuntu-upgrade-grub-efi-arm64-signed
  • ubuntu-upgrade-grub-efi-ia32-bin

References

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