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redhatRedHatRHSA-2023:0048
HistoryJan 09, 2023 - 2:22 p.m.

(RHSA-2023:0048) Moderate: grub2 security and bug fix update

2023-01-0914:22:50
access.redhat.com
14
grub2
security
bug fix
buffer overflow
secure boot
heap based
out-of-bounds write
kernel formats
file systems
modular architecture

8.6 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

0.001 Low

EPSS

Percentile

26.4%

JSON

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.

Bug Fix(es):

  • [RHEL8.6][SecureBoot][Denali/P10] boot process stops at grub prompt after copying the signed grub to prep partition (BZ#2108049)
OSVersionArchitecturePackageVersionFilename
RedHat8x86_64grub2-tools-minimal< 2.02-123.el8_6.12grub2-tools-minimal-2.02-123.el8_6.12.x86_64.rpm
RedHat8noarchgrub2-ppc64le-modules< 2.02-123.el8_6.12grub2-ppc64le-modules-2.02-123.el8_6.12.noarch.rpm
RedHat8x86_64grub2-tools-debuginfo< 2.02-123.el8_6.12grub2-tools-debuginfo-2.02-123.el8_6.12.x86_64.rpm
RedHat8noarchgrub2-pc-modules< 2.02-123.el8_6.12grub2-pc-modules-2.02-123.el8_6.12.noarch.rpm
RedHat8ppc64legrub2-tools< 2.02-123.el8_6.12grub2-tools-2.02-123.el8_6.12.ppc64le.rpm
RedHat8ppc64legrub2-tools-extra< 2.02-123.el8_6.12grub2-tools-extra-2.02-123.el8_6.12.ppc64le.rpm
RedHat8aarch64grub2-tools< 2.02-123.el8_6.12grub2-tools-2.02-123.el8_6.12.aarch64.rpm
RedHat8aarch64grub2-debuginfo< 2.02-123.el8_6.12grub2-debuginfo-2.02-123.el8_6.12.aarch64.rpm
RedHat8ppc64legrub2-tools-extra-debuginfo< 2.02-123.el8_6.12grub2-tools-extra-debuginfo-2.02-123.el8_6.12.ppc64le.rpm
RedHat8x86_64grub2-pc< 2.02-123.el8_6.12grub2-pc-2.02-123.el8_6.12.x86_64.rpm
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8.6 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

0.001 Low

EPSS

Percentile

26.4%

JSON
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