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Amazon Linux AMI 2: CVE-2020-25632: Security patch for grub2 (ALAS-2021-1684)

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Amazon Linux AMI 2: CVE-2020-25632: Security patch for grub2 (ALAS-2021-1684)

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
03/03/2021
Created
07/20/2021
Added
07/19/2021
Modified
07/19/2021

Description

A flaw was found in grub2 in versions prior to 2.06. The rmmod implementation allows the unloading of a module used as a dependency without checking if any other dependent module is still loaded leading to a use-after-free scenario. This could allow arbitrary code to be executed or a bypass of Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Solution(s)

  • amazon-linux-ami-2-upgrade-grub2
  • amazon-linux-ami-2-upgrade-grub2-common
  • amazon-linux-ami-2-upgrade-grub2-debuginfo
  • amazon-linux-ami-2-upgrade-grub2-efi-aa64
  • amazon-linux-ami-2-upgrade-grub2-efi-aa64-cdboot
  • amazon-linux-ami-2-upgrade-grub2-efi-aa64-ec2
  • amazon-linux-ami-2-upgrade-grub2-efi-aa64-modules
  • amazon-linux-ami-2-upgrade-grub2-efi-x64
  • amazon-linux-ami-2-upgrade-grub2-efi-x64-cdboot
  • amazon-linux-ami-2-upgrade-grub2-efi-x64-ec2
  • amazon-linux-ami-2-upgrade-grub2-efi-x64-modules
  • amazon-linux-ami-2-upgrade-grub2-emu
  • amazon-linux-ami-2-upgrade-grub2-emu-modules
  • amazon-linux-ami-2-upgrade-grub2-pc
  • amazon-linux-ami-2-upgrade-grub2-pc-modules
  • amazon-linux-ami-2-upgrade-grub2-tools
  • amazon-linux-ami-2-upgrade-grub2-tools-efi
  • amazon-linux-ami-2-upgrade-grub2-tools-extra
  • amazon-linux-ami-2-upgrade-grub2-tools-minimal

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