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Red Hat: RHSA-2022:8900-01 Important: Grub2 Integer Underflow

red hat
Calendar Grey December 8, 2022
Dist Redhat Esm H88
A significant security patch from Red Hat tackles severe vulnerabilities in the boot loader, impacting various hardware architectures.
An update for grub2 is now available for Red Hat Enterprise Linux 7

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: Integer underflow in grub_net_recv_ip4_packets (CVE-2022-28733)
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 security update Red Hat Enterprise Linux important integer underflow grub2 boot loader

References

https://access.redhat.com/security/cve/CVE-2022-28733 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: grub2-2.02-0.87.el7_9.11.src.rpm
noarch: grub2-common-2.02-0.87.el7_9.11.noarch.rpm grub2-efi-ia32-modules-2.02-0.87.el7_9.11.noarch.rpm grub2-efi-x64-modules-2.02-0.87.el7_9.11.noarch.rpm grub2-pc-modules-2.02-0.87.el7_9.11.noarch.rpm
x86_64: grub2-2.02-0.87.el7_9.11.x86_64.rpm grub2-debuginfo-2.02-0.87.el7_9.11.x86_64.rpm grub2-efi-ia32-2.02-0.87.el7_9.11.x86_64.rpm grub2-efi-x64-2.02-0.87.el7_9.11.x86_64.rpm grub2-pc-2.02-0.87.el7_9.11.x86_64.rpm grub2-tools-2.02-0.87.el7_9.11.x86_64.rpm grub2-tools-extra-2.02-0.87.el7_9.11.x86_64.rpm grub2-tools-minimal-2.02-0.87.el7_9.11.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
noarch: grub2-efi-aa64-modules-2.02-0.87.el7_9.11.noarch.rpm grub2-ppc-modules-2.02-0.87.el7_9.11.noarch.rpm grub2-ppc64-modules-2.02-0.87.el7_9.11.noarch.rpm grub2-ppc64le-modules-2.02-0.87.el7_9.11.noarch.rpm
x86_64: grub2-debuginfo-2.02-0.87.el7_9.11.x86_64.rpm grub2-efi-ia32-cdboot-2.02-0.87.el7_9.11.x86_64.rpm grub2-efi-x64-cdboot-2.02-0.87.el7_9.11.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: grub2-2.02-0.87.el7_9.11.src.rpm
noarch: grub2-common-2.02-0.87.el7_9.11.noarch.rpm grub2-efi-ia32-modules-2.02-0.87.el7_9.11.noarch.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:8900-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:8900
Issue date: 2022-12-08

Topic

An update for grub2 is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security update Red Hat Enterprise Linux important integer underflow grub2 boot loader

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - noarch, x86_64

Bugs Fixed

2083339 - CVE-2022-28733 grub2: Integer underflow in grub_net_recv_ip4_packets

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