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Red Hat Security Advisory 2023-0752-01

Red Hat Security Advisory 2023-0752-01 - The grub2 packages provide version 2 of the Grand Unified Boot Loader, 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. Issues addressed include buffer overflow, bypass, and out of bounds write vulnerabilities.

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====================================================================
Red Hat Security Advisory

Synopsis: Moderate: grub2 security update
Advisory ID: RHSA-2023:0752-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:0752
Issue date: 2023-02-14
CVE Names: CVE-2022-2601 CVE-2022-3775
====================================================================

  1. Summary:

An update for grub2 is now available for Red Hat Enterprise Linux 9.

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.

  1. Relevant releases/architectures:

Red Hat Enterprise Linux BaseOS (v. 9) - aarch64, noarch, ppc64le, x86_64

  1. 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.

  1. 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

  1. 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

  1. Package List:

Red Hat Enterprise Linux BaseOS (v. 9):

Source:
grub2-2.06-46.el9_1.3.src.rpm

aarch64:
grub2-debuginfo-2.06-46.el9_1.3.aarch64.rpm
grub2-debugsource-2.06-46.el9_1.3.aarch64.rpm
grub2-efi-aa64-2.06-46.el9_1.3.aarch64.rpm
grub2-efi-aa64-cdboot-2.06-46.el9_1.3.aarch64.rpm
grub2-emu-debuginfo-2.06-46.el9_1.3.aarch64.rpm
grub2-tools-2.06-46.el9_1.3.aarch64.rpm
grub2-tools-debuginfo-2.06-46.el9_1.3.aarch64.rpm
grub2-tools-extra-2.06-46.el9_1.3.aarch64.rpm
grub2-tools-extra-debuginfo-2.06-46.el9_1.3.aarch64.rpm
grub2-tools-minimal-2.06-46.el9_1.3.aarch64.rpm
grub2-tools-minimal-debuginfo-2.06-46.el9_1.3.aarch64.rpm

noarch:
grub2-common-2.06-46.el9_1.3.noarch.rpm
grub2-efi-aa64-modules-2.06-46.el9_1.3.noarch.rpm
grub2-efi-x64-modules-2.06-46.el9_1.3.noarch.rpm
grub2-pc-modules-2.06-46.el9_1.3.noarch.rpm
grub2-ppc64le-modules-2.06-46.el9_1.3.noarch.rpm

ppc64le:
grub2-debuginfo-2.06-46.el9_1.3.ppc64le.rpm
grub2-debugsource-2.06-46.el9_1.3.ppc64le.rpm
grub2-ppc64le-2.06-46.el9_1.3.ppc64le.rpm
grub2-tools-2.06-46.el9_1.3.ppc64le.rpm
grub2-tools-debuginfo-2.06-46.el9_1.3.ppc64le.rpm
grub2-tools-extra-2.06-46.el9_1.3.ppc64le.rpm
grub2-tools-extra-debuginfo-2.06-46.el9_1.3.ppc64le.rpm
grub2-tools-minimal-2.06-46.el9_1.3.ppc64le.rpm
grub2-tools-minimal-debuginfo-2.06-46.el9_1.3.ppc64le.rpm

x86_64:
grub2-debuginfo-2.06-46.el9_1.3.x86_64.rpm
grub2-debugsource-2.06-46.el9_1.3.x86_64.rpm
grub2-efi-x64-2.06-46.el9_1.3.x86_64.rpm
grub2-efi-x64-cdboot-2.06-46.el9_1.3.x86_64.rpm
grub2-emu-debuginfo-2.06-46.el9_1.3.x86_64.rpm
grub2-pc-2.06-46.el9_1.3.x86_64.rpm
grub2-tools-2.06-46.el9_1.3.x86_64.rpm
grub2-tools-debuginfo-2.06-46.el9_1.3.x86_64.rpm
grub2-tools-efi-2.06-46.el9_1.3.x86_64.rpm
grub2-tools-efi-debuginfo-2.06-46.el9_1.3.x86_64.rpm
grub2-tools-extra-2.06-46.el9_1.3.x86_64.rpm
grub2-tools-extra-debuginfo-2.06-46.el9_1.3.x86_64.rpm
grub2-tools-minimal-2.06-46.el9_1.3.x86_64.rpm
grub2-tools-minimal-debuginfo-2.06-46.el9_1.3.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/

  1. 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

  1. Contact:

The Red Hat security contact is [email protected]. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2023 Red Hat, Inc.
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