Issued:

2023-01-09

Updated:

2023-01-09

RHSA-2023:0048 - Moderate: grub2 security and bug fix update

Synopsis

Moderate: grub2 security and bug fix update

Type/Severity

Security Advisory: Moderate

Topic

An update for grub2 is now available for Red Hat Enterprise Linux 8.6 Extended Update Support.

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: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass (CVE-2022-2601)

• grub2: Heap based out-of-bounds write when redering certain unicode sequences (CVE-2022-3775)

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.

Bug Fix(es):

• [RHEL8.6][SecureBoot][Denali/P10] boot process stops at grub prompt after copying the signed grub to prep partition (BZ#2108049)

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

Updated Packages

• grub2-tools-minimal-debuginfo-2.02-123.el8_6.12.x86_64.rpm
• grub2-efi-x64-modules-2.02-123.el8_6.12.noarch.rpm
• grub2-efi-aa64-2.02-123.el8_6.12.aarch64.rpm
• grub2-tools-minimal-2.02-123.el8_6.12.aarch64.rpm
• grub2-efi-x64-2.02-123.el8_6.12.x86_64.rpm
• grub2-tools-extra-debuginfo-2.02-123.el8_6.12.aarch64.rpm
• grub2-common-2.02-123.el8_6.12.noarch.rpm
• grub2-tools-minimal-2.02-123.el8_6.12.ppc64le.rpm
• grub2-tools-2.02-123.el8_6.12.x86_64.rpm
• grub2-debugsource-2.02-123.el8_6.12.x86_64.rpm
• grub2-pc-modules-2.02-123.el8_6.12.noarch.rpm
• grub2-ppc64le-2.02-123.el8_6.12.ppc64le.rpm
• grub2-tools-2.02-123.el8_6.12.ppc64le.rpm
• grub2-tools-extra-2.02-123.el8_6.12.ppc64le.rpm
• grub2-tools-minimal-2.02-123.el8_6.12.x86_64.rpm
• grub2-pc-2.02-123.el8_6.12.x86_64.rpm
• grub2-ppc64le-modules-2.02-123.el8_6.12.noarch.rpm
• grub2-tools-efi-debuginfo-2.02-123.el8_6.12.x86_64.rpm
• grub2-tools-extra-2.02-123.el8_6.12.x86_64.rpm
• grub2-debugsource-2.02-123.el8_6.12.aarch64.rpm
• grub2-tools-2.02-123.el8_6.12.aarch64.rpm
• grub2-efi-ia32-cdboot-2.02-123.el8_6.12.x86_64.rpm
• grub2-efi-aa64-modules-2.02-123.el8_6.12.noarch.rpm
• grub2-tools-efi-2.02-123.el8_6.12.x86_64.rpm
• grub2-debuginfo-2.02-123.el8_6.12.aarch64.rpm
• grub2-efi-ia32-2.02-123.el8_6.12.x86_64.rpm
• grub2-tools-extra-2.02-123.el8_6.12.aarch64.rpm
• grub2-tools-extra-debuginfo-2.02-123.el8_6.12.ppc64le.rpm
• grub2-tools-minimal-debuginfo-2.02-123.el8_6.12.aarch64.rpm
• grub2-debugsource-2.02-123.el8_6.12.ppc64le.rpm
• grub2-2.02-123.el8_6.12.src.rpm
• grub2-efi-aa64-cdboot-2.02-123.el8_6.12.aarch64.rpm
• grub2-efi-ia32-modules-2.02-123.el8_6.12.noarch.rpm
• grub2-debuginfo-2.02-123.el8_6.12.ppc64le.rpm
• grub2-tools-minimal-debuginfo-2.02-123.el8_6.12.ppc64le.rpm
• grub2-tools-extra-debuginfo-2.02-123.el8_6.12.x86_64.rpm
• grub2-debuginfo-2.02-123.el8_6.12.x86_64.rpm
• grub2-tools-debuginfo-2.02-123.el8_6.12.aarch64.rpm
• grub2-tools-debuginfo-2.02-123.el8_6.12.x86_64.rpm
• grub2-efi-x64-cdboot-2.02-123.el8_6.12.x86_64.rpm
• grub2-tools-debuginfo-2.02-123.el8_6.12.ppc64le.rpm

Fixes

• This content is not included.BZ - 2112975
• This content is not included.BZ - 2138880

CVEs

• CVE-2022-2601
• CVE-2022-3775

References

• https://access.redhat.com/security/updates/classification/#moderate

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at Security Contacts and Procedures.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.