VULNERABILITY

Red Hat: CVE-2021-20233: Heap out-of-bounds write due to miscalculation of space required for quoting (Multiple Advisories)

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Red Hat: CVE-2021-20233: Heap out-of-bounds write due to miscalculation of space required for quoting (Multiple Advisories)

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
03/02/2021
Created
03/04/2021
Added
03/03/2021
Modified
12/15/2023

Description

A flaw was found in grub2 in versions prior to 2.06. Setparam_prefix() in the menu rendering code performs a length calculation on the assumption that expressing a quoted single quote will require 3 characters, while it actually requires 4 characters which allows an attacker to corrupt memory by one byte for each quote in the input. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Solution(s)

  • redhat-upgrade-fwupd
  • redhat-upgrade-fwupd-debuginfo
  • redhat-upgrade-fwupd-debugsource
  • redhat-upgrade-fwupd-tests-debuginfo
  • redhat-upgrade-grub2
  • redhat-upgrade-grub2-common
  • redhat-upgrade-grub2-debuginfo
  • redhat-upgrade-grub2-debugsource
  • redhat-upgrade-grub2-efi-aa64-modules
  • redhat-upgrade-grub2-efi-ia32
  • redhat-upgrade-grub2-efi-ia32-cdboot
  • redhat-upgrade-grub2-efi-ia32-modules
  • redhat-upgrade-grub2-efi-x64
  • redhat-upgrade-grub2-efi-x64-cdboot
  • redhat-upgrade-grub2-efi-x64-modules
  • redhat-upgrade-grub2-pc
  • redhat-upgrade-grub2-pc-modules
  • redhat-upgrade-grub2-ppc-modules
  • redhat-upgrade-grub2-ppc64-modules
  • redhat-upgrade-grub2-ppc64le-modules
  • redhat-upgrade-grub2-tools
  • redhat-upgrade-grub2-tools-debuginfo
  • redhat-upgrade-grub2-tools-efi
  • redhat-upgrade-grub2-tools-efi-debuginfo
  • redhat-upgrade-grub2-tools-extra
  • redhat-upgrade-grub2-tools-extra-debuginfo
  • redhat-upgrade-grub2-tools-minimal
  • redhat-upgrade-grub2-tools-minimal-debuginfo
  • redhat-upgrade-shim-ia32
  • redhat-upgrade-shim-unsigned-x64
  • redhat-upgrade-shim-x64

References

  • CVE-2021-20233
  • RHSA-2021:0696
  • RHSA-2021:0697
  • RHSA-2021:0698
  • RHSA-2021:0699
  • RHSA-2021:0700
  • RHSA-2021:0701
  • RHSA-2021:1734
  • RHSA-2021:2566
  • RHSA-2021:2790
  • RHSA-2021:3675
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