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Red Hat 8: RHSA-2022-2110-01 Minor Grub2 Vulnerability Resolved

red hat
Calendar Grey May 10, 2022
Dist Redhat Esm H88
A new patch for grub2 resolves a minor security flaw in Red Hat Enterprise Linux 8, correcting vital access rights.
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: Incorrect permission in grub.cfg allow unprivileged user to read the file content (CVE-2021-3981)
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.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.6 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory Red Hat bug fix low severity grub2

References

https://access.redhat.com/security/cve/CVE-2021-3981 https://access.redhat.com/security/updates/classification/#low https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.6_release_notes/

Package List

Red Hat Enterprise Linux BaseOS (v. 8):
Source: grub2-2.02-123.el8.src.rpm
aarch64: grub2-debuginfo-2.02-123.el8.aarch64.rpm grub2-debugsource-2.02-123.el8.aarch64.rpm grub2-efi-aa64-2.02-123.el8.aarch64.rpm grub2-efi-aa64-cdboot-2.02-123.el8.aarch64.rpm grub2-tools-2.02-123.el8.aarch64.rpm grub2-tools-debuginfo-2.02-123.el8.aarch64.rpm grub2-tools-extra-2.02-123.el8.aarch64.rpm grub2-tools-extra-debuginfo-2.02-123.el8.aarch64.rpm grub2-tools-minimal-2.02-123.el8.aarch64.rpm grub2-tools-minimal-debuginfo-2.02-123.el8.aarch64.rpm
noarch: grub2-common-2.02-123.el8.noarch.rpm grub2-efi-aa64-modules-2.02-123.el8.noarch.rpm grub2-efi-ia32-modules-2.02-123.el8.noarch.rpm grub2-efi-x64-modules-2.02-123.el8.noarch.rpm grub2-pc-modules-2.02-123.el8.noarch.rpm grub2-ppc64le-modules-2.02-123.el8.noarch.rpm
ppc64le: grub2-debuginfo-2.02-123.el8.ppc64le.rpm grub2-debugsource-2.02-123.el8.ppc64le.rpm grub2-ppc64le-2.02-123.el8.ppc64le.rpm grub2-tools-2.02-123.el8.ppc64le.rpm grub2-tools-debuginfo-2.02-123.el8.ppc64le.rpm grub2-tools-extra-2.02-123.el8.ppc64le.rpm grub2-tools-extra-debuginfo-2.02-123.el8.ppc64le.rpm grub2-tools-minimal-2.02-123.el8.ppc64le.rpm grub2-tools-minimal-debuginfo-2.02-123.el8.ppc64le.rpm
x86_64: grub2-debuginfo-2.02-123.el8.x86_64.rpm

Read the Full Advisory


Severity
low
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:2110-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:2110
Issue date: 2022-05-10

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 Low. 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 Red Hat bug fix low severity grub2

Relevant Releases Architectures

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

Bugs Fixed

1809246 - [RFE] GRUB does not consider information from proxy dhcp server

1899903 - grub2-mkconfig is never run on kernel upgrade even if GRUB_ENABLE_BLSCFG=false

1914575 - grub-boot-success.service should not be started inside systemd-nspawn container

2016269 - RPM grub2-tools-minimal is shipping prelink config files although prelink is absent in rhel8

2020927 - GRUB_TERMINAL_INPUT=at_keyboard makes grub stay on boot menu instead of starting the timeout

2024170 - CVE-2021-3981 grub2: Incorrect permission in grub.cfg allow unprivileged user to read the file content

2048904 - Cannot EFI chainload onto local disk when EFI partition is in Software Raid

2061252 - grub on OpenFirmware : search --hint-ieee1275= does not work

2069157 - grub2 signed by Red Hat Test Certificate

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