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====================================================================                   
Red Hat Security Advisory

Synopsis:          Important: grub2 security update
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
CVE Names:         CVE-2022-28733
====================================================================
1. Summary:

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 impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. 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

3. Description:

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.

4. 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

5. Bugs fixed (https://bugzilla.redhat.com/):

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

6. 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
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 ComputeNode 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 Server (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
grub2-ppc64-modules-2.02-0.87.el7_9.11.noarch.rpm
grub2-ppc64le-modules-2.02-0.87.el7_9.11.noarch.rpm

ppc64:
grub2-2.02-0.87.el7_9.11.ppc64.rpm
grub2-debuginfo-2.02-0.87.el7_9.11.ppc64.rpm
grub2-ppc64-2.02-0.87.el7_9.11.ppc64.rpm
grub2-tools-2.02-0.87.el7_9.11.ppc64.rpm
grub2-tools-extra-2.02-0.87.el7_9.11.ppc64.rpm
grub2-tools-minimal-2.02-0.87.el7_9.11.ppc64.rpm

ppc64le:
grub2-2.02-0.87.el7_9.11.ppc64le.rpm
grub2-debuginfo-2.02-0.87.el7_9.11.ppc64le.rpm
grub2-ppc64le-2.02-0.87.el7_9.11.ppc64le.rpm
grub2-tools-2.02-0.87.el7_9.11.ppc64le.rpm
grub2-tools-extra-2.02-0.87.el7_9.11.ppc64le.rpm
grub2-tools-minimal-2.02-0.87.el7_9.11.ppc64le.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 Server Optional (v. 7):

noarch:
grub2-efi-aa64-modules-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
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 Workstation (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 Workstation 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

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

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

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2022 Red Hat, Inc.
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