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CentOS Linux: CVE-2021-3696: Important: grub2, mokutil, shim, and shim-unsigned-x64 security update (Multiple Advisories)

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CentOS Linux: CVE-2021-3696: Important: grub2, mokutil, shim, and shim-unsigned-x64 security update (Multiple Advisories)

Severity
7
CVSS
(AV:L/AC:M/Au:N/C:C/I:C/A:C)
Published
06/16/2022
Created
06/18/2022
Added
06/17/2022
Modified
06/19/2023

Description

A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.

Solution(s)

  • centos-upgrade-grub2-common
  • centos-upgrade-grub2-debuginfo
  • centos-upgrade-grub2-debugsource
  • centos-upgrade-grub2-efi-aa64-modules
  • centos-upgrade-grub2-efi-ia32
  • centos-upgrade-grub2-efi-ia32-cdboot
  • centos-upgrade-grub2-efi-ia32-modules
  • centos-upgrade-grub2-efi-x64
  • centos-upgrade-grub2-efi-x64-cdboot
  • centos-upgrade-grub2-efi-x64-modules
  • centos-upgrade-grub2-emu-debuginfo
  • centos-upgrade-grub2-pc
  • centos-upgrade-grub2-pc-modules
  • centos-upgrade-grub2-ppc64le-modules
  • centos-upgrade-grub2-tools
  • centos-upgrade-grub2-tools-debuginfo
  • centos-upgrade-grub2-tools-efi
  • centos-upgrade-grub2-tools-efi-debuginfo
  • centos-upgrade-grub2-tools-extra
  • centos-upgrade-grub2-tools-extra-debuginfo
  • centos-upgrade-grub2-tools-minimal
  • centos-upgrade-grub2-tools-minimal-debuginfo
  • centos-upgrade-mokutil
  • centos-upgrade-mokutil-debuginfo
  • centos-upgrade-mokutil-debugsource
  • centos-upgrade-shim-ia32
  • centos-upgrade-shim-x64

References

  • CVE-2021-3696

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