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Red Hat 8.2: RHSA-2022:8800-01 Moderate: Grub2 Buffer Overflow

red hat
Calendar Grey December 6, 2022
Dist Redhat Esm H88
Recent security patch for grub2 in Red Hat Enterprise Linux focuses on mitigating buffer overflow vulnerabilities and potential exploit vectors.
An update for grub2 is now available for Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Enterprise Linux 8.2 Telecommunications Update Service, and Red Hat Enterpris...

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 security update Red Hat buffer overflow heap overflow grub2

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 AUS (v. 8.2):
Source: grub2-2.02-87.el8_2.11.src.rpm
aarch64: grub2-debuginfo-2.02-87.el8_2.11.aarch64.rpm grub2-debugsource-2.02-87.el8_2.11.aarch64.rpm grub2-efi-aa64-2.02-87.el8_2.11.aarch64.rpm grub2-efi-aa64-cdboot-2.02-87.el8_2.11.aarch64.rpm grub2-tools-2.02-87.el8_2.11.aarch64.rpm grub2-tools-debuginfo-2.02-87.el8_2.11.aarch64.rpm grub2-tools-extra-2.02-87.el8_2.11.aarch64.rpm grub2-tools-extra-debuginfo-2.02-87.el8_2.11.aarch64.rpm grub2-tools-minimal-2.02-87.el8_2.11.aarch64.rpm grub2-tools-minimal-debuginfo-2.02-87.el8_2.11.aarch64.rpm
noarch: grub2-common-2.02-87.el8_2.11.noarch.rpm grub2-efi-aa64-modules-2.02-87.el8_2.11.noarch.rpm grub2-efi-ia32-modules-2.02-87.el8_2.11.noarch.rpm grub2-efi-x64-modules-2.02-87.el8_2.11.noarch.rpm grub2-pc-modules-2.02-87.el8_2.11.noarch.rpm grub2-ppc64le-modules-2.02-87.el8_2.11.noarch.rpm
x86_64: grub2-debuginfo-2.02-87.el8_2.11.x86_64.rpm grub2-debugsource-2.02-87.el8_2.11.x86_64.rpm grub2-efi-ia32-2.02-87.el8_2.11.x86_64.rpm grub2-efi-ia32-cdboot-2.02-87.el8_2.11.x86_64.rpm grub2-efi-x64-2.02-87.el8_2.11.x86_64.rpm grub2-efi-x64-cdboot-2.02-87.el8_2.11.x86_64.rpm grub2-pc-2.02-87.el8_2.11.x86_64.rpm grub2-tools-2.02-87.el8_2.11.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2022:8800-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:8800
Issue date: 2022-12-06

Topic

An update for grub2 is now available for Red Hat Enterprise Linux 8.2Advanced Update Support, Red Hat Enterprise Linux 8.2 TelecommunicationsUpdate Service, and Red Hat Enterprise Linux 8.2 Update Services for SAPSolutions.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 security update Red Hat buffer overflow heap overflow grub2

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS AUS (v. 8.2) - aarch64, noarch, x86_64

Red Hat Enterprise Linux BaseOS E4S (v. 8.2) - aarch64, noarch, ppc64le, x86_64

Red Hat Enterprise Linux BaseOS TUS (v. 8.2) - aarch64, noarch, 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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