VULNERABILITY

Ubuntu: USN-6355-1 (CVE-2022-28737): GRUB2 vulnerabilities

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Ubuntu: USN-6355-1 (CVE-2022-28737): GRUB2 vulnerabilities

Severity
7
CVSS
(AV:L/AC:M/Au:N/C:C/I:C/A:C)
Published
07/20/2023
Created
09/18/2023
Added
09/18/2023
Modified
01/30/2025

Description

There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables; The handle_image() function takes into account the SizeOfRawData field from each section to be loaded. An attacker can leverage this to perform out-of-bound writes into memory. Arbitrary code execution is not discarded in such scenario.

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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