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Red Hat: RHSA-2022-8494 Moderate: Grub2 Buffer Overflow Issues

red hat
Calendar Grey November 16, 2022
Dist Redhat Esm H88
Grub2 patch issued for Red Hat Enterprise Linux 8.1, resolving several security vulnerabilities such as buffer overflow risks.
An update for grub2 is now available for Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions

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 buffer overflow red hat security fix 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 E4S (v. 8.1):
Source: grub2-2.02-87.el8_1.11.src.rpm
aarch64: grub2-debuginfo-2.02-87.el8_1.11.aarch64.rpm grub2-debugsource-2.02-87.el8_1.11.aarch64.rpm grub2-efi-aa64-2.02-87.el8_1.11.aarch64.rpm grub2-efi-aa64-cdboot-2.02-87.el8_1.11.aarch64.rpm grub2-tools-2.02-87.el8_1.11.aarch64.rpm grub2-tools-debuginfo-2.02-87.el8_1.11.aarch64.rpm grub2-tools-extra-2.02-87.el8_1.11.aarch64.rpm grub2-tools-extra-debuginfo-2.02-87.el8_1.11.aarch64.rpm grub2-tools-minimal-2.02-87.el8_1.11.aarch64.rpm grub2-tools-minimal-debuginfo-2.02-87.el8_1.11.aarch64.rpm
noarch: grub2-common-2.02-87.el8_1.11.noarch.rpm grub2-efi-aa64-modules-2.02-87.el8_1.11.noarch.rpm grub2-efi-ia32-modules-2.02-87.el8_1.11.noarch.rpm grub2-efi-x64-modules-2.02-87.el8_1.11.noarch.rpm grub2-pc-modules-2.02-87.el8_1.11.noarch.rpm grub2-ppc64le-modules-2.02-87.el8_1.11.noarch.rpm
ppc64le: grub2-debuginfo-2.02-87.el8_1.11.ppc64le.rpm grub2-debugsource-2.02-87.el8_1.11.ppc64le.rpm grub2-ppc64le-2.02-87.el8_1.11.ppc64le.rpm grub2-tools-2.02-87.el8_1.11.ppc64le.rpm grub2-tools-debuginfo-2.02-87.el8_1.11.ppc64le.rpm grub2-tools-extra-2.02-87.el8_1.11.ppc64le.rpm grub2-tools-extra-debuginfo-2.02-87.el8_1.11.ppc64le.rpm grub2-tools-minimal-2.02-87.el8_1.11.ppc64le.rpm

Read the Full Advisory


Advisory ID: RHSA-2022:8494-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:8494
Issue date: 2022-11-16

Topic

An update for grub2 is now available for Red Hat Enterprise Linux 8.1Update Services for SAP Solutions.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 buffer overflow red hat security fix heap overflow grub2

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS E4S (v. 8.1) - 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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