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Amazon Linux AMI 2: CVE-2021-3697: Security patch for grub2 (ALAS-2023-2146)

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Amazon Linux AMI 2: CVE-2021-3697: Security patch for grub2 (ALAS-2023-2146)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
07/06/2022
Created
07/21/2023
Added
07/21/2023
Modified
07/21/2023

Description

A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.

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

References

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