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Red Hat Enterprise Linux 8 RHSA-2023:0049 Moderate Grub2 Security Fix

red hat
Calendar Grey January 9, 2023
Dist Redhat Esm H88
A substantial patch for grub2 on Red Hat Enterprise Linux 8 has been released to tackle significant vulnerabilities.
An update for grub2 is now available for Red Hat Enterprise Linux 8

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

Summary

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.

Topics%20covered

Topics Covered

security advisory moderate buffer overflow Red Hat Enterprise Linux heap overflow grub2 update

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

Package List

Red Hat Enterprise Linux BaseOS (v. 8):
Source: grub2-2.02-142.el8_7.1.src.rpm
aarch64: grub2-debuginfo-2.02-142.el8_7.1.aarch64.rpm grub2-debugsource-2.02-142.el8_7.1.aarch64.rpm grub2-efi-aa64-2.02-142.el8_7.1.aarch64.rpm grub2-efi-aa64-cdboot-2.02-142.el8_7.1.aarch64.rpm grub2-tools-2.02-142.el8_7.1.aarch64.rpm grub2-tools-debuginfo-2.02-142.el8_7.1.aarch64.rpm grub2-tools-extra-2.02-142.el8_7.1.aarch64.rpm grub2-tools-extra-debuginfo-2.02-142.el8_7.1.aarch64.rpm grub2-tools-minimal-2.02-142.el8_7.1.aarch64.rpm grub2-tools-minimal-debuginfo-2.02-142.el8_7.1.aarch64.rpm
noarch: grub2-common-2.02-142.el8_7.1.noarch.rpm grub2-efi-aa64-modules-2.02-142.el8_7.1.noarch.rpm grub2-efi-ia32-modules-2.02-142.el8_7.1.noarch.rpm grub2-efi-x64-modules-2.02-142.el8_7.1.noarch.rpm grub2-pc-modules-2.02-142.el8_7.1.noarch.rpm grub2-ppc64le-modules-2.02-142.el8_7.1.noarch.rpm
ppc64le: grub2-debuginfo-2.02-142.el8_7.1.ppc64le.rpm grub2-debugsource-2.02-142.el8_7.1.ppc64le.rpm grub2-ppc64le-2.02-142.el8_7.1.ppc64le.rpm grub2-tools-2.02-142.el8_7.1.ppc64le.rpm grub2-tools-debuginfo-2.02-142.el8_7.1.ppc64le.rpm grub2-tools-extra-2.02-142.el8_7.1.ppc64le.rpm grub2-tools-extra-debuginfo-2.02-142.el8_7.1.ppc64le.rpm grub2-tools-minimal-2.02-142.el8_7.1.ppc64le.rpm

Read the Full Advisory


Advisory ID: RHSA-2023:0049-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:0049
Issue date: 2023-01-09

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 impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory moderate buffer overflow Red Hat Enterprise Linux heap overflow grub2 update

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, noarch, ppc64le, x86_64

Bugs Fixed

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

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