Home / mailings [RHSA-2023:0048-01] Moderate: grub2 security and bug fix update
Posted on 09 January 2023
RedHat===================================================================== Red Hat Security Advisory
Synopsis: Moderate: grub2 security and bug fix update
Advisory ID: RHSA-2023:0048-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:0048
Issue date: 2023-01-09
CVE Names: CVE-2022-2601 CVE-2022-3775
=====================================================================
1. Summary:
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.
2. Relevant releases/architectures:
Red Hat Enterprise Linux BaseOS EUS (v.8.6) - aarch64, noarch, ppc64le, x86_64
3. 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)
4. 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
5. Bugs fixed (https://bugzilla.redhat.com/):
2112975 - CVE-2022-2601 grub2: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass
2138880 - CVE-2022-3775 grub2: Heap based out-of-bounds write when redering certain unicode sequences
6. Package List:
Red Hat Enterprise Linux BaseOS EUS (v.8.6):
Source:
grub2-2.02-123.el8_6.12.src.rpm
aarch64:
grub2-debuginfo-2.02-123.el8_6.12.aarch64.rpm
grub2-debugsource-2.02-123.el8_6.12.aarch64.rpm
grub2-efi-aa64-2.02-123.el8_6.12.aarch64.rpm
grub2-efi-aa64-cdboot-2.02-123.el8_6.12.aarch64.rpm
grub2-tools-2.02-123.el8_6.12.aarch64.rpm
grub2-tools-debuginfo-2.02-123.el8_6.12.aarch64.rpm
grub2-tools-extra-2.02-123.el8_6.12.aarch64.rpm
grub2-tools-extra-debuginfo-2.02-123.el8_6.12.aarch64.rpm
grub2-tools-minimal-2.02-123.el8_6.12.aarch64.rpm
grub2-tools-minimal-debuginfo-2.02-123.el8_6.12.aarch64.rpm
noarch:
grub2-common-2.02-123.el8_6.12.noarch.rpm
grub2-efi-aa64-modules-2.02-123.el8_6.12.noarch.rpm
grub2-efi-ia32-modules-2.02-123.el8_6.12.noarch.rpm
grub2-efi-x64-modules-2.02-123.el8_6.12.noarch.rpm
grub2-pc-modules-2.02-123.el8_6.12.noarch.rpm
grub2-ppc64le-modules-2.02-123.el8_6.12.noarch.rpm
ppc64le:
grub2-debuginfo-2.02-123.el8_6.12.ppc64le.rpm
grub2-debugsource-2.02-123.el8_6.12.ppc64le.rpm
grub2-ppc64le-2.02-123.el8_6.12.ppc64le.rpm
grub2-tools-2.02-123.el8_6.12.ppc64le.rpm
grub2-tools-debuginfo-2.02-123.el8_6.12.ppc64le.rpm
grub2-tools-extra-2.02-123.el8_6.12.ppc64le.rpm
grub2-tools-extra-debuginfo-2.02-123.el8_6.12.ppc64le.rpm
grub2-tools-minimal-2.02-123.el8_6.12.ppc64le.rpm
grub2-tools-minimal-debuginfo-2.02-123.el8_6.12.ppc64le.rpm
x86_64:
grub2-debuginfo-2.02-123.el8_6.12.x86_64.rpm
grub2-debugsource-2.02-123.el8_6.12.x86_64.rpm
grub2-efi-ia32-2.02-123.el8_6.12.x86_64.rpm
grub2-efi-ia32-cdboot-2.02-123.el8_6.12.x86_64.rpm
grub2-efi-x64-2.02-123.el8_6.12.x86_64.rpm
grub2-efi-x64-cdboot-2.02-123.el8_6.12.x86_64.rpm
grub2-pc-2.02-123.el8_6.12.x86_64.rpm
grub2-tools-2.02-123.el8_6.12.x86_64.rpm
grub2-tools-debuginfo-2.02-123.el8_6.12.x86_64.rpm
grub2-tools-efi-2.02-123.el8_6.12.x86_64.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-tools-extra-debuginfo-2.02-123.el8_6.12.x86_64.rpm
grub2-tools-minimal-2.02-123.el8_6.12.x86_64.rpm
grub2-tools-minimal-debuginfo-2.02-123.el8_6.12.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
7. References:
https://access.redhat.com/security/cve/CVE-2022-2601
https://access.redhat.com/security/cve/CVE-2022-3775
https://access.redhat.com/security/updates/classification/#moderate
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2023 Red Hat, Inc.
