RedHat: RHSA-2022-5096:01 Important: grub2, mokutil, shim, | LinuxS...
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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: grub2, mokutil, shim, and shim-unsigned-x64 security update
Advisory ID:       RHSA-2022:5096-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2022:5096
Issue date:        2022-06-16
CVE Names:         CVE-2021-3695 CVE-2021-3696 CVE-2021-3697 
                   CVE-2022-28733 CVE-2022-28734 CVE-2022-28735 
                   CVE-2022-28736 CVE-2022-28737 
=====================================================================

1. Summary:

An update for grub2, mokutil, shim, and shim-unsigned-x64 is now available
for Red Hat Enterprise Linux 8.4 Extended Update Support.

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 CodeReady Linux Builder EUS (v. 8.4) - x86_64
Red Hat Enterprise Linux BaseOS EUS (v.8.4) - aarch64, noarch, ppc64le, 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.

The shim package contains a first-stage UEFI boot loader that handles
chaining to a trusted full boot loader under secure boot environments.

Security Fix(es):

* grub2: Integer underflow in grub_net_recv_ip4_packets (CVE-2022-28733)

* grub2: Crafted PNG grayscale images may lead to out-of-bounds write in
heap (CVE-2021-3695)

* grub2: Crafted PNG image may lead to out-of-bound write during huffman
table handling (CVE-2021-3696)

* grub2: Crafted JPEG image can lead to buffer underflow write in the heap
(CVE-2021-3697)

* grub2: Out-of-bound write when handling split HTTP headers
(CVE-2022-28734)

* grub2: shim_lock verifier allows non-kernel files to be loaded
(CVE-2022-28735)

* grub2: use-after-free in grub_cmd_chainloader() (CVE-2022-28736)

* shim: Buffer overflow when loading crafted EFI images (CVE-2022-28737)

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/):

1991685 - CVE-2021-3695 grub2: Crafted PNG grayscale images may lead to out-of-bounds write in heap
1991686 - CVE-2021-3696 grub2: Crafted PNG image may lead to out-of-bound write during huffman table handling
1991687 - CVE-2021-3697 grub2: Crafted JPEG image can lead to buffer underflow write in the heap
2083339 - CVE-2022-28733 grub2: Integer underflow in grub_net_recv_ip4_packets
2090463 - CVE-2022-28734 grub2: Out-of-bound write when handling split HTTP headers
2090857 - CVE-2022-28735 grub2: shim_lock verifier allows non-kernel files to be loaded
2090899 - CVE-2022-28737 shim: Buffer overflow when loading crafted EFI images
2092613 - CVE-2022-28736 grub2: use-after-free in grub_cmd_chainloader()

6. Package List:

Red Hat Enterprise Linux BaseOS EUS (v.8.4):

Source:
grub2-2.02-99.el8_4.9.src.rpm
mokutil-0.3.0-11.el8_4.1.src.rpm
shim-15.6-1.el8.src.rpm

aarch64:
grub2-debuginfo-2.02-99.el8_4.9.aarch64.rpm
grub2-debugsource-2.02-99.el8_4.9.aarch64.rpm
grub2-efi-aa64-2.02-99.el8_4.9.aarch64.rpm
grub2-efi-aa64-cdboot-2.02-99.el8_4.9.aarch64.rpm
grub2-tools-2.02-99.el8_4.9.aarch64.rpm
grub2-tools-debuginfo-2.02-99.el8_4.9.aarch64.rpm
grub2-tools-extra-2.02-99.el8_4.9.aarch64.rpm
grub2-tools-extra-debuginfo-2.02-99.el8_4.9.aarch64.rpm
grub2-tools-minimal-2.02-99.el8_4.9.aarch64.rpm
grub2-tools-minimal-debuginfo-2.02-99.el8_4.9.aarch64.rpm
mokutil-0.3.0-11.el8_4.1.aarch64.rpm
mokutil-debuginfo-0.3.0-11.el8_4.1.aarch64.rpm
mokutil-debugsource-0.3.0-11.el8_4.1.aarch64.rpm
shim-aa64-15.6-1.el8.aarch64.rpm

noarch:
grub2-common-2.02-99.el8_4.9.noarch.rpm
grub2-efi-aa64-modules-2.02-99.el8_4.9.noarch.rpm
grub2-efi-ia32-modules-2.02-99.el8_4.9.noarch.rpm
grub2-efi-x64-modules-2.02-99.el8_4.9.noarch.rpm
grub2-pc-modules-2.02-99.el8_4.9.noarch.rpm
grub2-ppc64le-modules-2.02-99.el8_4.9.noarch.rpm

ppc64le:
grub2-debuginfo-2.02-99.el8_4.9.ppc64le.rpm
grub2-debugsource-2.02-99.el8_4.9.ppc64le.rpm
grub2-ppc64le-2.02-99.el8_4.9.ppc64le.rpm
grub2-tools-2.02-99.el8_4.9.ppc64le.rpm
grub2-tools-debuginfo-2.02-99.el8_4.9.ppc64le.rpm
grub2-tools-extra-2.02-99.el8_4.9.ppc64le.rpm
grub2-tools-extra-debuginfo-2.02-99.el8_4.9.ppc64le.rpm
grub2-tools-minimal-2.02-99.el8_4.9.ppc64le.rpm
grub2-tools-minimal-debuginfo-2.02-99.el8_4.9.ppc64le.rpm

x86_64:
grub2-debuginfo-2.02-99.el8_4.9.x86_64.rpm
grub2-debugsource-2.02-99.el8_4.9.x86_64.rpm
grub2-efi-ia32-2.02-99.el8_4.9.x86_64.rpm
grub2-efi-ia32-cdboot-2.02-99.el8_4.9.x86_64.rpm
grub2-efi-x64-2.02-99.el8_4.9.x86_64.rpm
grub2-efi-x64-cdboot-2.02-99.el8_4.9.x86_64.rpm
grub2-pc-2.02-99.el8_4.9.x86_64.rpm
grub2-tools-2.02-99.el8_4.9.x86_64.rpm
grub2-tools-debuginfo-2.02-99.el8_4.9.x86_64.rpm
grub2-tools-efi-2.02-99.el8_4.9.x86_64.rpm
grub2-tools-efi-debuginfo-2.02-99.el8_4.9.x86_64.rpm
grub2-tools-extra-2.02-99.el8_4.9.x86_64.rpm
grub2-tools-extra-debuginfo-2.02-99.el8_4.9.x86_64.rpm
grub2-tools-minimal-2.02-99.el8_4.9.x86_64.rpm
grub2-tools-minimal-debuginfo-2.02-99.el8_4.9.x86_64.rpm
mokutil-0.3.0-11.el8_4.1.x86_64.rpm
mokutil-debuginfo-0.3.0-11.el8_4.1.x86_64.rpm
mokutil-debugsource-0.3.0-11.el8_4.1.x86_64.rpm
shim-ia32-15.6-1.el8.x86_64.rpm
shim-x64-15.6-1.el8.x86_64.rpm

Red Hat CodeReady Linux Builder EUS (v. 8.4):

Source:
shim-unsigned-x64-15.6-1.el8.src.rpm

x86_64:
shim-unsigned-x64-15.6-1.el8.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-2021-3695
https://access.redhat.com/security/cve/CVE-2021-3696
https://access.redhat.com/security/cve/CVE-2021-3697
https://access.redhat.com/security/cve/CVE-2022-28733
https://access.redhat.com/security/cve/CVE-2022-28734
https://access.redhat.com/security/cve/CVE-2022-28735
https://access.redhat.com/security/cve/CVE-2022-28736
https://access.redhat.com/security/cve/CVE-2022-28737
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2022 Red Hat, Inc.
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RedHat: RHSA-2022-5096:01 Important: grub2, mokutil, shim,

An update for grub2, mokutil, shim, and shim-unsigned-x64 is now available for Red Hat Enterprise Linux 8.4 Extended Update Support

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.
The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments.
Security Fix(es):
* grub2: Integer underflow in grub_net_recv_ip4_packets (CVE-2022-28733)
* grub2: Crafted PNG grayscale images may lead to out-of-bounds write in heap (CVE-2021-3695)
* grub2: Crafted PNG image may lead to out-of-bound write during huffman table handling (CVE-2021-3696)
* grub2: Crafted JPEG image can lead to buffer underflow write in the heap (CVE-2021-3697)
* grub2: Out-of-bound write when handling split HTTP headers (CVE-2022-28734)
* grub2: shim_lock verifier allows non-kernel files to be loaded (CVE-2022-28735)
* grub2: use-after-free in grub_cmd_chainloader() (CVE-2022-28736)
* shim: Buffer overflow when loading crafted EFI images (CVE-2022-28737)
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.

Solution

For details on how to apply this update, which includes the changesdescribed in this advisory, refer to:https://access.redhat.com/articles/11258

References

https://access.redhat.com/security/cve/CVE-2021-3695 https://access.redhat.com/security/cve/CVE-2021-3696 https://access.redhat.com/security/cve/CVE-2021-3697 https://access.redhat.com/security/cve/CVE-2022-28733 https://access.redhat.com/security/cve/CVE-2022-28734 https://access.redhat.com/security/cve/CVE-2022-28735 https://access.redhat.com/security/cve/CVE-2022-28736 https://access.redhat.com/security/cve/CVE-2022-28737 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux BaseOS EUS (v.8.4):
Source: grub2-2.02-99.el8_4.9.src.rpm mokutil-0.3.0-11.el8_4.1.src.rpm shim-15.6-1.el8.src.rpm
aarch64: grub2-debuginfo-2.02-99.el8_4.9.aarch64.rpm grub2-debugsource-2.02-99.el8_4.9.aarch64.rpm grub2-efi-aa64-2.02-99.el8_4.9.aarch64.rpm grub2-efi-aa64-cdboot-2.02-99.el8_4.9.aarch64.rpm grub2-tools-2.02-99.el8_4.9.aarch64.rpm grub2-tools-debuginfo-2.02-99.el8_4.9.aarch64.rpm grub2-tools-extra-2.02-99.el8_4.9.aarch64.rpm grub2-tools-extra-debuginfo-2.02-99.el8_4.9.aarch64.rpm grub2-tools-minimal-2.02-99.el8_4.9.aarch64.rpm grub2-tools-minimal-debuginfo-2.02-99.el8_4.9.aarch64.rpm mokutil-0.3.0-11.el8_4.1.aarch64.rpm mokutil-debuginfo-0.3.0-11.el8_4.1.aarch64.rpm mokutil-debugsource-0.3.0-11.el8_4.1.aarch64.rpm shim-aa64-15.6-1.el8.aarch64.rpm
noarch: grub2-common-2.02-99.el8_4.9.noarch.rpm grub2-efi-aa64-modules-2.02-99.el8_4.9.noarch.rpm grub2-efi-ia32-modules-2.02-99.el8_4.9.noarch.rpm grub2-efi-x64-modules-2.02-99.el8_4.9.noarch.rpm grub2-pc-modules-2.02-99.el8_4.9.noarch.rpm grub2-ppc64le-modules-2.02-99.el8_4.9.noarch.rpm
ppc64le: grub2-debuginfo-2.02-99.el8_4.9.ppc64le.rpm grub2-debugsource-2.02-99.el8_4.9.ppc64le.rpm grub2-ppc64le-2.02-99.el8_4.9.ppc64le.rpm grub2-tools-2.02-99.el8_4.9.ppc64le.rpm grub2-tools-debuginfo-2.02-99.el8_4.9.ppc64le.rpm grub2-tools-extra-2.02-99.el8_4.9.ppc64le.rpm grub2-tools-extra-debuginfo-2.02-99.el8_4.9.ppc64le.rpm grub2-tools-minimal-2.02-99.el8_4.9.ppc64le.rpm grub2-tools-minimal-debuginfo-2.02-99.el8_4.9.ppc64le.rpm
x86_64: grub2-debuginfo-2.02-99.el8_4.9.x86_64.rpm grub2-debugsource-2.02-99.el8_4.9.x86_64.rpm grub2-efi-ia32-2.02-99.el8_4.9.x86_64.rpm grub2-efi-ia32-cdboot-2.02-99.el8_4.9.x86_64.rpm grub2-efi-x64-2.02-99.el8_4.9.x86_64.rpm grub2-efi-x64-cdboot-2.02-99.el8_4.9.x86_64.rpm grub2-pc-2.02-99.el8_4.9.x86_64.rpm grub2-tools-2.02-99.el8_4.9.x86_64.rpm grub2-tools-debuginfo-2.02-99.el8_4.9.x86_64.rpm grub2-tools-efi-2.02-99.el8_4.9.x86_64.rpm grub2-tools-efi-debuginfo-2.02-99.el8_4.9.x86_64.rpm grub2-tools-extra-2.02-99.el8_4.9.x86_64.rpm grub2-tools-extra-debuginfo-2.02-99.el8_4.9.x86_64.rpm grub2-tools-minimal-2.02-99.el8_4.9.x86_64.rpm grub2-tools-minimal-debuginfo-2.02-99.el8_4.9.x86_64.rpm mokutil-0.3.0-11.el8_4.1.x86_64.rpm mokutil-debuginfo-0.3.0-11.el8_4.1.x86_64.rpm mokutil-debugsource-0.3.0-11.el8_4.1.x86_64.rpm shim-ia32-15.6-1.el8.x86_64.rpm shim-x64-15.6-1.el8.x86_64.rpm
Red Hat CodeReady Linux Builder EUS (v. 8.4):
Source: shim-unsigned-x64-15.6-1.el8.src.rpm
x86_64: shim-unsigned-x64-15.6-1.el8.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/

Severity
Advisory ID: RHSA-2022:5096-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:5096
Issued Date: : 2022-06-16
CVE Names: CVE-2021-3695 CVE-2021-3696 CVE-2021-3697 CVE-2022-28733 CVE-2022-28734 CVE-2022-28735 CVE-2022-28736 CVE-2022-28737

Topic

An update for grub2, mokutil, shim, and shim-unsigned-x64 is now availablefor Red Hat Enterprise Linux 8.4 Extended Update Support.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.

Relevant Releases Architectures

Red Hat CodeReady Linux Builder EUS (v. 8.4) - x86_64

Red Hat Enterprise Linux BaseOS EUS (v.8.4) - aarch64, noarch, ppc64le, x86_64

Bugs Fixed

1991685 - CVE-2021-3695 grub2: Crafted PNG grayscale images may lead to out-of-bounds write in heap

1991686 - CVE-2021-3696 grub2: Crafted PNG image may lead to out-of-bound write during huffman table handling

1991687 - CVE-2021-3697 grub2: Crafted JPEG image can lead to buffer underflow write in the heap

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

2090463 - CVE-2022-28734 grub2: Out-of-bound write when handling split HTTP headers

2090857 - CVE-2022-28735 grub2: shim_lock verifier allows non-kernel files to be loaded

2090899 - CVE-2022-28737 shim: Buffer overflow when loading crafted EFI images

2092613 - CVE-2022-28736 grub2: use-after-free in grub_cmd_chainloader()

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