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Rocky Linux: CVE-2022-28736: Important: grub2, mokutil, shim, and shim-unsigned-x64 security update (RLSA-2022-5095)

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Rocky Linux: CVE-2022-28736: Important: grub2, mokutil, shim, and shim-unsigned-x64 security update (RLSA-2022-5095)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
07/07/2022
Created
07/16/2022
Added
07/11/2022
Modified
07/31/2023

Description

There's a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up operating systems that doesn't support multiboot and do not have direct support from GRUB2. When executing chainloader more than once a use-after-free vulnerability is triggered. If an attacker can control the GRUB2's memory allocation pattern sensitive data may be exposed and arbitrary code execution can be achieved.

Solution(s)

  • rocky-upgrade-grub2
  • rocky-upgrade-grub2-common
  • rocky-upgrade-grub2-debuginfo
  • rocky-upgrade-grub2-debugsource
  • rocky-upgrade-grub2-efi-aa64
  • rocky-upgrade-grub2-efi-aa64-cdboot
  • rocky-upgrade-grub2-efi-aa64-modules
  • rocky-upgrade-grub2-efi-ia32
  • rocky-upgrade-grub2-efi-ia32-cdboot
  • rocky-upgrade-grub2-efi-ia32-modules
  • rocky-upgrade-grub2-efi-x64
  • rocky-upgrade-grub2-efi-x64-cdboot
  • rocky-upgrade-grub2-efi-x64-modules
  • rocky-upgrade-grub2-pc
  • rocky-upgrade-grub2-pc-modules
  • rocky-upgrade-grub2-tools
  • rocky-upgrade-grub2-tools-debuginfo
  • rocky-upgrade-grub2-tools-efi
  • rocky-upgrade-grub2-tools-efi-debuginfo
  • rocky-upgrade-grub2-tools-extra
  • rocky-upgrade-grub2-tools-extra-debuginfo
  • rocky-upgrade-grub2-tools-minimal
  • rocky-upgrade-grub2-tools-minimal-debuginfo

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