Issued:
2021-03-02
Updated:
2021-03-02

RHSA-2021:0696 - Moderate: grub2 security update

Synopsis

Moderate: grub2 security update

Type/Severity

Security Advisory Moderate

Topic

An update for grub2 is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices.

Security Fix(es):

  • grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled (CVE-2020-14372)

  • grub2: Use-after-free in rmmod command (CVE-2020-25632)

  • grub2: Out-of-bounds write in grub_usb_device_initialize() (CVE-2020-25647)

  • grub2: Stack buffer overflow in grub_parser_split_cmdline() (CVE-2020-27749)

  • grub2: cutmem command allows privileged user to remove memory regions when Secure Boot is enabled (CVE-2020-27779)

  • grub2: Heap out-of-bounds write in short form option parser (CVE-2021-20225)

  • grub2: Heap out-of-bounds write due to miscalculation of space required for quoting (CVE-2021-20233)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for x86_648x86_64
Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions8.8x86_64
Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions8.6x86_64
Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions8.4x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support8.8x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support8.6x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support8.4x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension8.8x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension8.6x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension8.4x86_64
Red Hat Enterprise Linux for x86_64 - Extended Life Cycle8.10x86_64
Red Hat Enterprise Linux for Power, little endian8ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Update Support8.8ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Update Support8.6ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Update Support8.4ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle8.10ppc64le
Red Hat Enterprise Linux for ARM 648aarch64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support8.8aarch64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support8.6aarch64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support8.4aarch64
Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle8.10aarch64
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions8.8ppc64le
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions8.6ppc64le
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions8.4ppc64le
Red Hat Enterprise Linux Server - TUS8.8x86_64
Red Hat Enterprise Linux Server - TUS8.6x86_64
Red Hat Enterprise Linux Server - TUS8.4x86_64
Red Hat Enterprise Linux Server - AUS8.6x86_64
Red Hat Enterprise Linux Server - AUS8.4x86_64

Updated Packages

  • grub2-tools-2.02-90.el8_3.1.ppc64le.rpm
  • grub2-tools-minimal-debuginfo-2.02-90.el8_3.1.ppc64le.rpm
  • grub2-tools-debuginfo-2.02-90.el8_3.1.x86_64.rpm
  • grub2-tools-extra-2.02-90.el8_3.1.x86_64.rpm
  • grub2-pc-modules-2.02-90.el8_3.1.noarch.rpm
  • grub2-tools-extra-2.02-90.el8_3.1.ppc64le.rpm
  • grub2-tools-debuginfo-2.02-90.el8_3.1.aarch64.rpm
  • grub2-efi-aa64-modules-2.02-90.el8_3.1.noarch.rpm
  • grub2-debuginfo-2.02-90.el8_3.1.ppc64le.rpm
  • grub2-common-2.02-90.el8_3.1.noarch.rpm
  • grub2-pc-2.02-90.el8_3.1.x86_64.rpm
  • grub2-tools-2.02-90.el8_3.1.aarch64.rpm
  • grub2-tools-2.02-90.el8_3.1.x86_64.rpm
  • grub2-debugsource-2.02-90.el8_3.1.x86_64.rpm
  • grub2-efi-x64-cdboot-2.02-90.el8_3.1.x86_64.rpm
  • grub2-efi-ia32-modules-2.02-90.el8_3.1.noarch.rpm
  • grub2-tools-efi-2.02-90.el8_3.1.x86_64.rpm
  • grub2-tools-extra-2.02-90.el8_3.1.aarch64.rpm
  • grub2-tools-extra-debuginfo-2.02-90.el8_3.1.x86_64.rpm
  • grub2-debuginfo-2.02-90.el8_3.1.aarch64.rpm
  • grub2-efi-ia32-2.02-90.el8_3.1.x86_64.rpm
  • grub2-tools-extra-debuginfo-2.02-90.el8_3.1.aarch64.rpm
  • grub2-2.02-90.el8_3.1.src.rpm
  • grub2-tools-efi-debuginfo-2.02-90.el8_3.1.x86_64.rpm
  • grub2-debugsource-2.02-90.el8_3.1.ppc64le.rpm
  • grub2-tools-minimal-debuginfo-2.02-90.el8_3.1.aarch64.rpm
  • grub2-tools-minimal-2.02-90.el8_3.1.aarch64.rpm
  • grub2-ppc64le-modules-2.02-90.el8_3.1.noarch.rpm
  • grub2-tools-extra-debuginfo-2.02-90.el8_3.1.ppc64le.rpm
  • grub2-tools-debuginfo-2.02-90.el8_3.1.ppc64le.rpm
  • grub2-efi-ia32-cdboot-2.02-90.el8_3.1.x86_64.rpm
  • grub2-ppc64le-2.02-90.el8_3.1.ppc64le.rpm
  • grub2-tools-minimal-debuginfo-2.02-90.el8_3.1.x86_64.rpm
  • grub2-efi-x64-2.02-90.el8_3.1.x86_64.rpm
  • grub2-debuginfo-2.02-90.el8_3.1.x86_64.rpm
  • grub2-efi-aa64-2.02-90.el8_3.1.aarch64.rpm
  • grub2-efi-aa64-cdboot-2.02-90.el8_3.1.aarch64.rpm
  • grub2-tools-minimal-2.02-90.el8_3.1.ppc64le.rpm
  • grub2-tools-minimal-2.02-90.el8_3.1.x86_64.rpm
  • grub2-debugsource-2.02-90.el8_3.1.aarch64.rpm
  • grub2-efi-x64-modules-2.02-90.el8_3.1.noarch.rpm

Fixes

CVEs

References

Additional information