Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2020.2647
grub2 security and bug fix update
4 August 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: grub2
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 7
Red Hat Enterprise Linux WS/Desktop 7
Impact/Access: Root Compromise -- Existing Account
Execute Arbitrary Code/Commands -- Existing Account
Increased Privileges -- Existing Account
Modify Arbitrary Files -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-15707 CVE-2020-15706 CVE-2020-15705
CVE-2020-14311 CVE-2020-14310 CVE-2020-14309
CVE-2020-14308 CVE-2020-10713
Reference: ASB-2020.0135
ESB-2020.2615
ESB-2020.2591
Original Bulletin:
https://access.redhat.com/errata/RHSA-2020:3271
https://access.redhat.com/errata/RHSA-2020:3273
https://access.redhat.com/errata/RHSA-2020:3274
https://access.redhat.com/errata/RHSA-2020:3275
https://access.redhat.com/errata/RHSA-2020:3276
Comment: This bulletin contains five (5) Red Hat security advisories.
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=====================================================================
Red Hat Security Advisory
Synopsis: Moderate: grub2 security and bug fix update
Advisory ID: RHSA-2020:3271-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3271
Issue date: 2020-08-03
CVE Names: CVE-2020-10713 CVE-2020-14308 CVE-2020-14309
CVE-2020-14310 CVE-2020-14311 CVE-2020-15705
CVE-2020-15706 CVE-2020-15707
=====================================================================
1. Summary:
An update for grub2, shim, shim-signed, and fwupdate is now available for
Red Hat Enterprise Linux 7.6 Extended Update Support.
Red Hat Product Security has rated this update as having a security impact
of Moderate. 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 ComputeNode EUS (v. 7.6) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) - noarch, x86_64
Red Hat Enterprise Linux Server EUS (v. 7.6) - noarch, ppc64, ppc64le, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 7.6) - noarch, x86_64
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, noarch, ppc64le
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, noarch
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.
The fwupdate packages provide a service that allows session software to
update device firmware.
Security Fix(es):
* grub2: Crafted grub.cfg file can lead to arbitrary code execution during
boot process (CVE-2020-10713)
* grub2: grub_malloc does not validate allocation size allowing for
arithmetic overflow and subsequent heap-based buffer overflow
(CVE-2020-14308)
* grub2: Integer overflow in grub_squash_read_symlink may lead to
heap-based buffer overflow (CVE-2020-14309)
* grub2: Integer overflow read_section_as_string may lead to heap-based
buffer overflow (CVE-2020-14310)
* grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer
overflow (CVE-2020-14311)
* grub2: Fail kernel validation without shim protocol (CVE-2020-15705)
* grub2: Use-after-free redefining a function whilst the same function is
already executing (CVE-2020-15706)
* grub2: Integer overflow in initrd size handling (CVE-2020-15707)
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):
* grub2 should get resynced with 7.8 branch (BZ#1861857)
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/):
1825243 - CVE-2020-10713 grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process
1852009 - CVE-2020-14308 grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent heap-based buffer overflow
1852014 - CVE-2020-14311 grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow
1852022 - CVE-2020-14309 grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow
1852030 - CVE-2020-14310 grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow
1860978 - CVE-2020-15705 grub2: Fail kernel validation without shim protocol
1861118 - CVE-2020-15706 grub2: Use-after-free redefining a function whilst the same function is already executing
1861581 - CVE-2020-15707 grub2: Integer overflow in initrd size handling
1861857 - grub2 should get resynced with 7.8 branch
6. Package List:
Red Hat Enterprise Linux ComputeNode EUS (v. 7.6):
Source:
fwupdate-12-6.el7_6.src.rpm
grub2-2.02-0.86.el7_6.src.rpm
shim-15-8.el7.src.rpm
shim-signed-15-8.el7_6.src.rpm
noarch:
grub2-common-2.02-0.86.el7_6.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7_6.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7_6.noarch.rpm
grub2-pc-modules-2.02-0.86.el7_6.noarch.rpm
shim-unsigned-aa64-debuginfo-15-8.el7.noarch.rpm
shim-unsigned-ia32-debuginfo-15-8.el7.noarch.rpm
shim-unsigned-x64-debuginfo-15-8.el7.noarch.rpm
x86_64:
fwupdate-12-6.el7_6.x86_64.rpm
fwupdate-debuginfo-12-6.el7_6.x86_64.rpm
fwupdate-efi-12-6.el7_6.x86_64.rpm
fwupdate-libs-12-6.el7_6.x86_64.rpm
grub2-2.02-0.86.el7_6.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7_6.x86_64.rpm
grub2-efi-ia32-2.02-0.86.el7_6.x86_64.rpm
grub2-efi-x64-2.02-0.86.el7_6.x86_64.rpm
grub2-pc-2.02-0.86.el7_6.x86_64.rpm
grub2-tools-2.02-0.86.el7_6.x86_64.rpm
grub2-tools-extra-2.02-0.86.el7_6.x86_64.rpm
grub2-tools-minimal-2.02-0.86.el7_6.x86_64.rpm
mokutil-15-8.el7_6.x86_64.rpm
mokutil-debuginfo-15-8.el7_6.x86_64.rpm
shim-ia32-15-8.el7_6.x86_64.rpm
shim-unsigned-ia32-15-8.el7.x86_64.rpm
shim-unsigned-x64-15-8.el7.x86_64.rpm
shim-x64-15-8.el7_6.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6):
noarch:
grub2-efi-aa64-modules-2.02-0.86.el7_6.noarch.rpm
grub2-ppc-modules-2.02-0.86.el7_6.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7_6.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7_6.noarch.rpm
x86_64:
fwupdate-debuginfo-12-6.el7_6.x86_64.rpm
fwupdate-devel-12-6.el7_6.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7_6.x86_64.rpm
grub2-efi-ia32-cdboot-2.02-0.86.el7_6.x86_64.rpm
grub2-efi-x64-cdboot-2.02-0.86.el7_6.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 7.6):
Source:
fwupdate-12-6.el7_6.src.rpm
grub2-2.02-0.86.el7_6.src.rpm
shim-15-8.el7.src.rpm
shim-signed-15-8.el7_6.src.rpm
noarch:
grub2-common-2.02-0.86.el7_6.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7_6.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7_6.noarch.rpm
grub2-pc-modules-2.02-0.86.el7_6.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7_6.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7_6.noarch.rpm
shim-unsigned-aa64-debuginfo-15-8.el7.noarch.rpm
shim-unsigned-ia32-debuginfo-15-8.el7.noarch.rpm
shim-unsigned-x64-debuginfo-15-8.el7.noarch.rpm
ppc64:
grub2-2.02-0.86.el7_6.ppc64.rpm
grub2-debuginfo-2.02-0.86.el7_6.ppc64.rpm
grub2-ppc64-2.02-0.86.el7_6.ppc64.rpm
grub2-tools-2.02-0.86.el7_6.ppc64.rpm
grub2-tools-extra-2.02-0.86.el7_6.ppc64.rpm
grub2-tools-minimal-2.02-0.86.el7_6.ppc64.rpm
ppc64le:
grub2-2.02-0.86.el7_6.ppc64le.rpm
grub2-debuginfo-2.02-0.86.el7_6.ppc64le.rpm
grub2-ppc64le-2.02-0.86.el7_6.ppc64le.rpm
grub2-tools-2.02-0.86.el7_6.ppc64le.rpm
grub2-tools-extra-2.02-0.86.el7_6.ppc64le.rpm
grub2-tools-minimal-2.02-0.86.el7_6.ppc64le.rpm
x86_64:
fwupdate-12-6.el7_6.x86_64.rpm
fwupdate-debuginfo-12-6.el7_6.x86_64.rpm
fwupdate-efi-12-6.el7_6.x86_64.rpm
fwupdate-libs-12-6.el7_6.x86_64.rpm
grub2-2.02-0.86.el7_6.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7_6.x86_64.rpm
grub2-efi-ia32-2.02-0.86.el7_6.x86_64.rpm
grub2-efi-x64-2.02-0.86.el7_6.x86_64.rpm
grub2-pc-2.02-0.86.el7_6.x86_64.rpm
grub2-tools-2.02-0.86.el7_6.x86_64.rpm
grub2-tools-extra-2.02-0.86.el7_6.x86_64.rpm
grub2-tools-minimal-2.02-0.86.el7_6.x86_64.rpm
mokutil-15-8.el7_6.x86_64.rpm
mokutil-debuginfo-15-8.el7_6.x86_64.rpm
shim-ia32-15-8.el7_6.x86_64.rpm
shim-unsigned-ia32-15-8.el7.x86_64.rpm
shim-unsigned-x64-15-8.el7.x86_64.rpm
shim-x64-15-8.el7_6.x86_64.rpm
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):
Source:
fwupdate-12-6.el7_6.src.rpm
grub2-2.02-0.86.el7_6.src.rpm
shim-15-8.el7.src.rpm
shim-signed-15-8.el7_6.src.rpm
aarch64:
fwupdate-12-6.el7_6.aarch64.rpm
fwupdate-debuginfo-12-6.el7_6.aarch64.rpm
fwupdate-efi-12-6.el7_6.aarch64.rpm
fwupdate-libs-12-6.el7_6.aarch64.rpm
grub2-2.02-0.86.el7_6.aarch64.rpm
grub2-debuginfo-2.02-0.86.el7_6.aarch64.rpm
grub2-efi-aa64-2.02-0.86.el7_6.aarch64.rpm
grub2-tools-2.02-0.86.el7_6.aarch64.rpm
grub2-tools-extra-2.02-0.86.el7_6.aarch64.rpm
grub2-tools-minimal-2.02-0.86.el7_6.aarch64.rpm
mokutil-15-8.el7_6.aarch64.rpm
mokutil-debuginfo-15-8.el7_6.aarch64.rpm
shim-aa64-15-8.el7_6.aarch64.rpm
shim-unsigned-aa64-15-8.el7.aarch64.rpm
noarch:
grub2-common-2.02-0.86.el7_6.noarch.rpm
grub2-efi-aa64-modules-2.02-0.86.el7_6.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7_6.noarch.rpm
shim-unsigned-ia32-debuginfo-15-8.el7.noarch.rpm
shim-unsigned-x64-debuginfo-15-8.el7.noarch.rpm
ppc64le:
grub2-2.02-0.86.el7_6.ppc64le.rpm
grub2-debuginfo-2.02-0.86.el7_6.ppc64le.rpm
grub2-ppc64le-2.02-0.86.el7_6.ppc64le.rpm
grub2-tools-2.02-0.86.el7_6.ppc64le.rpm
grub2-tools-extra-2.02-0.86.el7_6.ppc64le.rpm
grub2-tools-minimal-2.02-0.86.el7_6.ppc64le.rpm
Red Hat Enterprise Linux Server Optional EUS (v. 7.6):
noarch:
grub2-efi-aa64-modules-2.02-0.86.el7_6.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7_6.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7_6.noarch.rpm
grub2-pc-modules-2.02-0.86.el7_6.noarch.rpm
grub2-ppc-modules-2.02-0.86.el7_6.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7_6.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7_6.noarch.rpm
x86_64:
fwupdate-debuginfo-12-6.el7_6.x86_64.rpm
fwupdate-devel-12-6.el7_6.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7_6.x86_64.rpm
grub2-efi-ia32-cdboot-2.02-0.86.el7_6.x86_64.rpm
grub2-efi-x64-cdboot-2.02-0.86.el7_6.x86_64.rpm
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7):
aarch64:
fwupdate-debuginfo-12-6.el7_6.aarch64.rpm
fwupdate-devel-12-6.el7_6.aarch64.rpm
grub2-debuginfo-2.02-0.86.el7_6.aarch64.rpm
grub2-efi-aa64-cdboot-2.02-0.86.el7_6.aarch64.rpm
noarch:
grub2-efi-aa64-modules-2.02-0.86.el7_6.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7_6.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7_6.noarch.rpm
grub2-pc-modules-2.02-0.86.el7_6.noarch.rpm
grub2-ppc-modules-2.02-0.86.el7_6.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7_6.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7_6.noarch.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-2020-10713
https://access.redhat.com/security/cve/CVE-2020-14308
https://access.redhat.com/security/cve/CVE-2020-14309
https://access.redhat.com/security/cve/CVE-2020-14310
https://access.redhat.com/security/cve/CVE-2020-14311
https://access.redhat.com/security/cve/CVE-2020-15705
https://access.redhat.com/security/cve/CVE-2020-15706
https://access.redhat.com/security/cve/CVE-2020-15707
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/security/vulnerabilities/grub2bootloader
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2020 Red Hat, Inc.
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=====================================================================
Red Hat Security Advisory
Synopsis: Moderate: grub2 security and bug fix update
Advisory ID: RHSA-2020:3273-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3273
Issue date: 2020-08-03
CVE Names: CVE-2020-10713 CVE-2020-14308 CVE-2020-14309
CVE-2020-14310 CVE-2020-14311 CVE-2020-15705
CVE-2020-15706
=====================================================================
1. Summary:
An update for grub2, shim, and shim-signed is now available for Red Hat
Enterprise Linux 7.2 Advanced Update Support.
Red Hat Product Security has rated this update as having a security impact
of Moderate. 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 Server AUS (v. 7.2) - noarch, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.2) - 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.
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: Crafted grub.cfg file can lead to arbitrary code execution during
boot process (CVE-2020-10713)
* grub2: grub_malloc does not validate allocation size allowing for
arithmetic overflow and subsequent heap-based buffer overflow
(CVE-2020-14308)
* grub2: Integer overflow in grub_squash_read_symlink may lead to
heap-based buffer overflow (CVE-2020-14309)
* grub2: Integer overflow read_section_as_string may lead to heap-based
buffer overflow (CVE-2020-14310)
* grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer
overflow (CVE-2020-14311)
* grub2: Fail kernel validation without shim protocol (CVE-2020-15705)
* grub2: Use-after-free redefining a function whilst the same function is
already executing (CVE-2020-15706)
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):
* grub2 should get resynced with 7.8 branch (BZ#1861861)
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/):
1825243 - CVE-2020-10713 grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process
1852009 - CVE-2020-14308 grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent heap-based buffer overflow
1852014 - CVE-2020-14311 grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow
1852022 - CVE-2020-14309 grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow
1852030 - CVE-2020-14310 grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow
1860978 - CVE-2020-15705 grub2: Fail kernel validation without shim protocol
1861118 - CVE-2020-15706 grub2: Use-after-free redefining a function whilst the same function is already executing
1861861 - grub2 should get resynced with 7.8 branch
6. Package List:
Red Hat Enterprise Linux Server AUS (v. 7.2):
Source:
grub2-2.02-0.86.el7_2.src.rpm
shim-15-8.el7.src.rpm
shim-signed-15-8.el7_2.src.rpm
noarch:
grub2-common-2.02-0.86.el7_2.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7_2.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7_2.noarch.rpm
grub2-pc-modules-2.02-0.86.el7_2.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7_2.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7_2.noarch.rpm
shim-unsigned-aa64-debuginfo-15-8.el7.noarch.rpm
shim-unsigned-x64-debuginfo-15-8.el7.noarch.rpm
x86_64:
grub2-2.02-0.86.el7_2.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7_2.x86_64.rpm
grub2-efi-ia32-2.02-0.86.el7_2.x86_64.rpm
grub2-efi-x64-2.02-0.86.el7_2.x86_64.rpm
grub2-pc-2.02-0.86.el7_2.x86_64.rpm
grub2-tools-2.02-0.86.el7_2.x86_64.rpm
grub2-tools-extra-2.02-0.86.el7_2.x86_64.rpm
grub2-tools-minimal-2.02-0.86.el7_2.x86_64.rpm
mokutil-15-8.el7_2.x86_64.rpm
mokutil-debuginfo-15-8.el7_2.x86_64.rpm
shim-15-8.el7_2.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 7.2):
Source:
grub2-2.02-0.86.el7_2.src.rpm
shim-15-8.el7.src.rpm
noarch:
grub2-efi-aa64-modules-2.02-0.86.el7_2.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7_2.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7_2.noarch.rpm
grub2-pc-modules-2.02-0.86.el7_2.noarch.rpm
grub2-ppc-modules-2.02-0.86.el7_2.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7_2.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7_2.noarch.rpm
x86_64:
grub2-debuginfo-2.02-0.86.el7_2.x86_64.rpm
grub2-efi-ia32-cdboot-2.02-0.86.el7_2.x86_64.rpm
grub2-efi-x64-cdboot-2.02-0.86.el7_2.x86_64.rpm
shim-unsigned-ia32-15-8.el7.x86_64.rpm
shim-unsigned-x64-15-8.el7.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-2020-10713
https://access.redhat.com/security/cve/CVE-2020-14308
https://access.redhat.com/security/cve/CVE-2020-14309
https://access.redhat.com/security/cve/CVE-2020-14310
https://access.redhat.com/security/cve/CVE-2020-14311
https://access.redhat.com/security/cve/CVE-2020-15705
https://access.redhat.com/security/cve/CVE-2020-15706
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/security/vulnerabilities/grub2bootloader
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2020 Red Hat, Inc.
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Hash: SHA256
=====================================================================
Red Hat Security Advisory
Synopsis: Moderate: grub2 security and bug fix update
Advisory ID: RHSA-2020:3274-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3274
Issue date: 2020-08-03
CVE Names: CVE-2020-10713 CVE-2020-14308 CVE-2020-14309
CVE-2020-14310 CVE-2020-14311 CVE-2020-15705
CVE-2020-15706 CVE-2020-15707
=====================================================================
1. Summary:
An update for grub2, shim, shim-signed, and fwupdate is now available for
Red Hat Enterprise Linux 7.7 Extended Update Support.
Red Hat Product Security has rated this update as having a security impact
of Moderate. 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 ComputeNode EUS (v. 7.7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) - noarch, x86_64
Red Hat Enterprise Linux Server EUS (v. 7.7) - noarch, ppc64, ppc64le, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 7.7) - 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.
The shim package contains a first-stage UEFI boot loader that handles
chaining to a trusted full boot loader under secure boot environments.
The fwupdate packages provide a service that allows session software to
update device firmware.
Security Fix(es):
* grub2: Crafted grub.cfg file can lead to arbitrary code execution during
boot process (CVE-2020-10713)
* grub2: grub_malloc does not validate allocation size allowing for
arithmetic overflow and subsequent heap-based buffer overflow
(CVE-2020-14308)
* grub2: Integer overflow in grub_squash_read_symlink may lead to
heap-based buffer overflow (CVE-2020-14309)
* grub2: Integer overflow read_section_as_string may lead to heap-based
buffer overflow (CVE-2020-14310)
* grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer
overflow (CVE-2020-14311)
* grub2: Fail kernel validation without shim protocol (CVE-2020-15705)
* grub2: Use-after-free redefining a function whilst the same function is
already executing (CVE-2020-15706)
* grub2: Integer overflow in initrd size handling (CVE-2020-15707)
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):
* grub2 should get resynced with 7.8 branch (BZ#1861855)
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/):
1825243 - CVE-2020-10713 grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process
1852009 - CVE-2020-14308 grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent heap-based buffer overflow
1852014 - CVE-2020-14311 grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow
1852022 - CVE-2020-14309 grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow
1852030 - CVE-2020-14310 grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow
1860978 - CVE-2020-15705 grub2: Fail kernel validation without shim protocol
1861118 - CVE-2020-15706 grub2: Use-after-free redefining a function whilst the same function is already executing
1861581 - CVE-2020-15707 grub2: Integer overflow in initrd size handling
1861855 - grub2 should get resynced with 7.8 branch
6. Package List:
Red Hat Enterprise Linux ComputeNode EUS (v. 7.7):
Source:
fwupdate-12-6.el7_7.src.rpm
grub2-2.02-0.86.el7_7.src.rpm
shim-15-8.el7.src.rpm
shim-signed-15-8.el7_7.src.rpm
noarch:
grub2-common-2.02-0.86.el7_7.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7_7.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7_7.noarch.rpm
grub2-pc-modules-2.02-0.86.el7_7.noarch.rpm
shim-unsigned-aa64-debuginfo-15-8.el7.noarch.rpm
shim-unsigned-ia32-debuginfo-15-8.el7.noarch.rpm
shim-unsigned-x64-debuginfo-15-8.el7.noarch.rpm
x86_64:
fwupdate-12-6.el7_7.x86_64.rpm
fwupdate-debuginfo-12-6.el7_7.x86_64.rpm
fwupdate-efi-12-6.el7_7.x86_64.rpm
fwupdate-libs-12-6.el7_7.x86_64.rpm
grub2-2.02-0.86.el7_7.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7_7.x86_64.rpm
grub2-efi-ia32-2.02-0.86.el7_7.x86_64.rpm
grub2-efi-x64-2.02-0.86.el7_7.x86_64.rpm
grub2-pc-2.02-0.86.el7_7.x86_64.rpm
grub2-tools-2.02-0.86.el7_7.x86_64.rpm
grub2-tools-extra-2.02-0.86.el7_7.x86_64.rpm
grub2-tools-minimal-2.02-0.86.el7_7.x86_64.rpm
mokutil-15-8.el7_7.x86_64.rpm
mokutil-debuginfo-15-8.el7_7.x86_64.rpm
shim-ia32-15-8.el7_7.x86_64.rpm
shim-unsigned-ia32-15-8.el7.x86_64.rpm
shim-unsigned-x64-15-8.el7.x86_64.rpm
shim-x64-15-8.el7_7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7):
noarch:
grub2-efi-aa64-modules-2.02-0.86.el7_7.noarch.rpm
grub2-ppc-modules-2.02-0.86.el7_7.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7_7.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7_7.noarch.rpm
x86_64:
fwupdate-debuginfo-12-6.el7_7.x86_64.rpm
fwupdate-devel-12-6.el7_7.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7_7.x86_64.rpm
grub2-efi-ia32-cdboot-2.02-0.86.el7_7.x86_64.rpm
grub2-efi-x64-cdboot-2.02-0.86.el7_7.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 7.7):
Source:
fwupdate-12-6.el7_7.src.rpm
grub2-2.02-0.86.el7_7.src.rpm
shim-15-8.el7.src.rpm
shim-signed-15-8.el7_7.src.rpm
noarch:
grub2-common-2.02-0.86.el7_7.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7_7.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7_7.noarch.rpm
grub2-pc-modules-2.02-0.86.el7_7.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7_7.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7_7.noarch.rpm
shim-unsigned-aa64-debuginfo-15-8.el7.noarch.rpm
shim-unsigned-ia32-debuginfo-15-8.el7.noarch.rpm
shim-unsigned-x64-debuginfo-15-8.el7.noarch.rpm
ppc64:
grub2-2.02-0.86.el7_7.ppc64.rpm
grub2-debuginfo-2.02-0.86.el7_7.ppc64.rpm
grub2-ppc64-2.02-0.86.el7_7.ppc64.rpm
grub2-tools-2.02-0.86.el7_7.ppc64.rpm
grub2-tools-extra-2.02-0.86.el7_7.ppc64.rpm
grub2-tools-minimal-2.02-0.86.el7_7.ppc64.rpm
ppc64le:
grub2-2.02-0.86.el7_7.ppc64le.rpm
grub2-debuginfo-2.02-0.86.el7_7.ppc64le.rpm
grub2-ppc64le-2.02-0.86.el7_7.ppc64le.rpm
grub2-tools-2.02-0.86.el7_7.ppc64le.rpm
grub2-tools-extra-2.02-0.86.el7_7.ppc64le.rpm
grub2-tools-minimal-2.02-0.86.el7_7.ppc64le.rpm
x86_64:
fwupdate-12-6.el7_7.x86_64.rpm
fwupdate-debuginfo-12-6.el7_7.x86_64.rpm
fwupdate-efi-12-6.el7_7.x86_64.rpm
fwupdate-libs-12-6.el7_7.x86_64.rpm
grub2-2.02-0.86.el7_7.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7_7.x86_64.rpm
grub2-efi-ia32-2.02-0.86.el7_7.x86_64.rpm
grub2-efi-x64-2.02-0.86.el7_7.x86_64.rpm
grub2-pc-2.02-0.86.el7_7.x86_64.rpm
grub2-tools-2.02-0.86.el7_7.x86_64.rpm
grub2-tools-extra-2.02-0.86.el7_7.x86_64.rpm
grub2-tools-minimal-2.02-0.86.el7_7.x86_64.rpm
mokutil-15-8.el7_7.x86_64.rpm
mokutil-debuginfo-15-8.el7_7.x86_64.rpm
shim-ia32-15-8.el7_7.x86_64.rpm
shim-unsigned-ia32-15-8.el7.x86_64.rpm
shim-unsigned-x64-15-8.el7.x86_64.rpm
shim-x64-15-8.el7_7.x86_64.rpm
Red Hat Enterprise Linux Server Optional EUS (v. 7.7):
noarch:
grub2-efi-aa64-modules-2.02-0.86.el7_7.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7_7.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7_7.noarch.rpm
grub2-pc-modules-2.02-0.86.el7_7.noarch.rpm
grub2-ppc-modules-2.02-0.86.el7_7.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7_7.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7_7.noarch.rpm
x86_64:
fwupdate-debuginfo-12-6.el7_7.x86_64.rpm
fwupdate-devel-12-6.el7_7.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7_7.x86_64.rpm
grub2-efi-ia32-cdboot-2.02-0.86.el7_7.x86_64.rpm
grub2-efi-x64-cdboot-2.02-0.86.el7_7.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-2020-10713
https://access.redhat.com/security/cve/CVE-2020-14308
https://access.redhat.com/security/cve/CVE-2020-14309
https://access.redhat.com/security/cve/CVE-2020-14310
https://access.redhat.com/security/cve/CVE-2020-14311
https://access.redhat.com/security/cve/CVE-2020-15705
https://access.redhat.com/security/cve/CVE-2020-15706
https://access.redhat.com/security/cve/CVE-2020-15707
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/security/vulnerabilities/grub2bootloader
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2020 Red Hat, Inc.
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Hash: SHA256
=====================================================================
Red Hat Security Advisory
Synopsis: Moderate: grub2 security and bug fix update
Advisory ID: RHSA-2020:3275-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3275
Issue date: 2020-08-03
CVE Names: CVE-2020-10713 CVE-2020-14308 CVE-2020-14309
CVE-2020-14310 CVE-2020-14311 CVE-2020-15705
CVE-2020-15706 CVE-2020-15707
=====================================================================
1. Summary:
An update for grub2, shim, shim-signed, and fwupdate is now available for
Red Hat Enterprise Linux 7.4 Advanced Update Support, Red Hat Enterprise
Linux 7.4 Telco Extended Update Support, and Red Hat Enterprise Linux 7.4
Update Services for SAP Solutions.
Red Hat Product Security has rated this update as having a security impact
of Moderate. 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 Server AUS (v. 7.4) - noarch, x86_64
Red Hat Enterprise Linux Server E4S (v. 7.4) - noarch, ppc64le, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - noarch, x86_64
Red Hat Enterprise Linux Server Optional E4S (v. 7.4) - noarch, x86_64
Red Hat Enterprise Linux Server Optional TUS (v. 7.4) - noarch, x86_64
Red Hat Enterprise Linux Server TUS (v. 7.4) - 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.
The shim package contains a first-stage UEFI boot loader that handles
chaining to a trusted full boot loader under secure boot environments.
The fwupdate packages provide a service that allows session software to
update device firmware.
Security Fix(es):
* grub2: Crafted grub.cfg file can lead to arbitrary code execution during
boot process (CVE-2020-10713)
* grub2: grub_malloc does not validate allocation size allowing for
arithmetic overflow and subsequent heap-based buffer overflow
(CVE-2020-14308)
* grub2: Integer overflow in grub_squash_read_symlink may lead to
heap-based buffer overflow (CVE-2020-14309)
* grub2: Integer overflow read_section_as_string may lead to heap-based
buffer overflow (CVE-2020-14310)
* grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer
overflow (CVE-2020-14311)
* grub2: Fail kernel validation without shim protocol (CVE-2020-15705)
* grub2: Use-after-free redefining a function whilst the same function is
already executing (CVE-2020-15706)
* grub2: Integer overflow in initrd size handling (CVE-2020-15707)
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):
* grub2 should get resynced with 7.8 branch (BZ#1861858)
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/):
1825243 - CVE-2020-10713 grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process
1852009 - CVE-2020-14308 grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent heap-based buffer overflow
1852014 - CVE-2020-14311 grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow
1852022 - CVE-2020-14309 grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow
1852030 - CVE-2020-14310 grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow
1860978 - CVE-2020-15705 grub2: Fail kernel validation without shim protocol
1861118 - CVE-2020-15706 grub2: Use-after-free redefining a function whilst the same function is already executing
1861581 - CVE-2020-15707 grub2: Integer overflow in initrd size handling
1861858 - grub2 should get resynced with 7.8 branch
6. Package List:
Red Hat Enterprise Linux Server AUS (v. 7.4):
Source:
fwupdate-9-10.el7_4.src.rpm
grub2-2.02-0.86.el7_4.src.rpm
shim-15-8.el7.src.rpm
shim-signed-15-8.el7_4.src.rpm
noarch:
grub2-common-2.02-0.86.el7_4.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7_4.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7_4.noarch.rpm
grub2-pc-modules-2.02-0.86.el7_4.noarch.rpm
shim-unsigned-ia32-debuginfo-15-8.el7.noarch.rpm
shim-unsigned-x64-debuginfo-15-8.el7.noarch.rpm
x86_64:
fwupdate-debuginfo-9-10.el7_4.x86_64.rpm
fwupdate-efi-9-10.el7_4.x86_64.rpm
fwupdate-libs-9-10.el7_4.x86_64.rpm
grub2-2.02-0.86.el7_4.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7_4.x86_64.rpm
grub2-efi-ia32-2.02-0.86.el7_4.x86_64.rpm
grub2-efi-x64-2.02-0.86.el7_4.x86_64.rpm
grub2-pc-2.02-0.86.el7_4.x86_64.rpm
grub2-tools-2.02-0.86.el7_4.x86_64.rpm
grub2-tools-extra-2.02-0.86.el7_4.x86_64.rpm
grub2-tools-minimal-2.02-0.86.el7_4.x86_64.rpm
mokutil-15-8.el7_4.x86_64.rpm
mokutil-debuginfo-15-8.el7_4.x86_64.rpm
shim-ia32-15-8.el7_4.x86_64.rpm
shim-unsigned-ia32-15-8.el7.x86_64.rpm
shim-unsigned-x64-15-8.el7.x86_64.rpm
shim-x64-15-8.el7_4.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.4):
Source:
fwupdate-9-10.el7_4.src.rpm
grub2-2.02-0.86.el7_4.src.rpm
shim-15-8.el7.src.rpm
shim-signed-15-8.el7_4.src.rpm
noarch:
grub2-common-2.02-0.86.el7_4.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7_4.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7_4.noarch.rpm
grub2-pc-modules-2.02-0.86.el7_4.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7_4.noarch.rpm
shim-unsigned-ia32-debuginfo-15-8.el7.noarch.rpm
shim-unsigned-x64-debuginfo-15-8.el7.noarch.rpm
ppc64le:
grub2-2.02-0.86.el7_4.ppc64le.rpm
grub2-debuginfo-2.02-0.86.el7_4.ppc64le.rpm
grub2-ppc64le-2.02-0.86.el7_4.ppc64le.rpm
grub2-tools-2.02-0.86.el7_4.ppc64le.rpm
grub2-tools-extra-2.02-0.86.el7_4.ppc64le.rpm
grub2-tools-minimal-2.02-0.86.el7_4.ppc64le.rpm
x86_64:
fwupdate-debuginfo-9-10.el7_4.x86_64.rpm
fwupdate-efi-9-10.el7_4.x86_64.rpm
fwupdate-libs-9-10.el7_4.x86_64.rpm
grub2-2.02-0.86.el7_4.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7_4.x86_64.rpm
grub2-efi-ia32-2.02-0.86.el7_4.x86_64.rpm
grub2-efi-x64-2.02-0.86.el7_4.x86_64.rpm
grub2-pc-2.02-0.86.el7_4.x86_64.rpm
grub2-tools-2.02-0.86.el7_4.x86_64.rpm
grub2-tools-extra-2.02-0.86.el7_4.x86_64.rpm
grub2-tools-minimal-2.02-0.86.el7_4.x86_64.rpm
mokutil-15-8.el7_4.x86_64.rpm
mokutil-debuginfo-15-8.el7_4.x86_64.rpm
shim-ia32-15-8.el7_4.x86_64.rpm
shim-unsigned-ia32-15-8.el7.x86_64.rpm
shim-unsigned-x64-15-8.el7.x86_64.rpm
shim-x64-15-8.el7_4.x86_64.rpm
Red Hat Enterprise Linux Server TUS (v. 7.4):
Source:
fwupdate-9-10.el7_4.src.rpm
grub2-2.02-0.86.el7_4.src.rpm
shim-15-8.el7.src.rpm
shim-signed-15-8.el7_4.src.rpm
noarch:
grub2-common-2.02-0.86.el7_4.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7_4.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7_4.noarch.rpm
grub2-pc-modules-2.02-0.86.el7_4.noarch.rpm
shim-unsigned-ia32-debuginfo-15-8.el7.noarch.rpm
shim-unsigned-x64-debuginfo-15-8.el7.noarch.rpm
x86_64:
fwupdate-debuginfo-9-10.el7_4.x86_64.rpm
fwupdate-efi-9-10.el7_4.x86_64.rpm
fwupdate-libs-9-10.el7_4.x86_64.rpm
grub2-2.02-0.86.el7_4.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7_4.x86_64.rpm
grub2-efi-ia32-2.02-0.86.el7_4.x86_64.rpm
grub2-efi-x64-2.02-0.86.el7_4.x86_64.rpm
grub2-pc-2.02-0.86.el7_4.x86_64.rpm
grub2-tools-2.02-0.86.el7_4.x86_64.rpm
grub2-tools-extra-2.02-0.86.el7_4.x86_64.rpm
grub2-tools-minimal-2.02-0.86.el7_4.x86_64.rpm
mokutil-15-8.el7_4.x86_64.rpm
mokutil-debuginfo-15-8.el7_4.x86_64.rpm
shim-ia32-15-8.el7_4.x86_64.rpm
shim-unsigned-ia32-15-8.el7.x86_64.rpm
shim-unsigned-x64-15-8.el7.x86_64.rpm
shim-x64-15-8.el7_4.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 7.4):
noarch:
grub2-efi-aa64-modules-2.02-0.86.el7_4.noarch.rpm
grub2-ppc-modules-2.02-0.86.el7_4.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7_4.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7_4.noarch.rpm
x86_64:
fwupdate-9-10.el7_4.x86_64.rpm
fwupdate-debuginfo-9-10.el7_4.x86_64.rpm
fwupdate-devel-9-10.el7_4.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7_4.x86_64.rpm
grub2-efi-ia32-cdboot-2.02-0.86.el7_4.x86_64.rpm
grub2-efi-x64-cdboot-2.02-0.86.el7_4.x86_64.rpm
Red Hat Enterprise Linux Server Optional E4S (v. 7.4):
noarch:
grub2-efi-aa64-modules-2.02-0.86.el7_4.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7_4.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7_4.noarch.rpm
grub2-pc-modules-2.02-0.86.el7_4.noarch.rpm
grub2-ppc-modules-2.02-0.86.el7_4.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7_4.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7_4.noarch.rpm
x86_64:
fwupdate-9-10.el7_4.x86_64.rpm
fwupdate-debuginfo-9-10.el7_4.x86_64.rpm
fwupdate-devel-9-10.el7_4.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7_4.x86_64.rpm
grub2-efi-ia32-cdboot-2.02-0.86.el7_4.x86_64.rpm
grub2-efi-x64-cdboot-2.02-0.86.el7_4.x86_64.rpm
Red Hat Enterprise Linux Server Optional TUS (v. 7.4):
noarch:
grub2-efi-aa64-modules-2.02-0.86.el7_4.noarch.rpm
grub2-ppc-modules-2.02-0.86.el7_4.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7_4.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7_4.noarch.rpm
x86_64:
fwupdate-9-10.el7_4.x86_64.rpm
fwupdate-debuginfo-9-10.el7_4.x86_64.rpm
fwupdate-devel-9-10.el7_4.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7_4.x86_64.rpm
grub2-efi-ia32-cdboot-2.02-0.86.el7_4.x86_64.rpm
grub2-efi-x64-cdboot-2.02-0.86.el7_4.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-2020-10713
https://access.redhat.com/security/cve/CVE-2020-14308
https://access.redhat.com/security/cve/CVE-2020-14309
https://access.redhat.com/security/cve/CVE-2020-14310
https://access.redhat.com/security/cve/CVE-2020-14311
https://access.redhat.com/security/cve/CVE-2020-15705
https://access.redhat.com/security/cve/CVE-2020-15706
https://access.redhat.com/security/cve/CVE-2020-15707
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/security/vulnerabilities/grub2bootloader
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2020 Red Hat, Inc.
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Hash: SHA256
=====================================================================
Red Hat Security Advisory
Synopsis: Moderate: grub2 security and bug fix update
Advisory ID: RHSA-2020:3276-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3276
Issue date: 2020-08-03
CVE Names: CVE-2020-10713 CVE-2020-14308 CVE-2020-14309
CVE-2020-14310 CVE-2020-14311 CVE-2020-15705
CVE-2020-15706 CVE-2020-15707
=====================================================================
1. Summary:
An update for grub2, shim, and shim-signed is now available for Red Hat
Enterprise Linux 7.3 Advanced Update Support, Red Hat Enterprise Linux 7.3
Telco Extended Update Support, and Red Hat Enterprise Linux 7.3 Update
Services for SAP Solutions.
Red Hat Product Security has rated this update as having a security impact
of Moderate. 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 Server AUS (v. 7.3) - noarch, x86_64
Red Hat Enterprise Linux Server E4S (v. 7.3) - noarch, ppc64le, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.3) - noarch, x86_64
Red Hat Enterprise Linux Server Optional E4S (v. 7.3) - noarch, ppc64le, x86_64
Red Hat Enterprise Linux Server Optional TUS (v. 7.3) - noarch, x86_64
Red Hat Enterprise Linux Server TUS (v. 7.3) - 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.
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: Crafted grub.cfg file can lead to arbitrary code execution during
boot process (CVE-2020-10713)
* grub2: grub_malloc does not validate allocation size allowing for
arithmetic overflow and subsequent heap-based buffer overflow
(CVE-2020-14308)
* grub2: Integer overflow in grub_squash_read_symlink may lead to
heap-based buffer overflow (CVE-2020-14309)
* grub2: Integer overflow read_section_as_string may lead to heap-based
buffer overflow (CVE-2020-14310)
* grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer
overflow (CVE-2020-14311)
* grub2: Fail kernel validation without shim protocol (CVE-2020-15705)
* grub2: Use-after-free redefining a function whilst the same function is
already executing (CVE-2020-15706)
* grub2: Integer overflow in initrd size handling (CVE-2020-15707)
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):
* grub2 should get resynced with 7.8 branch (BZ#1861860)
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/):
1825243 - CVE-2020-10713 grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process
1852009 - CVE-2020-14308 grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent heap-based buffer overflow
1852014 - CVE-2020-14311 grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow
1852022 - CVE-2020-14309 grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow
1852030 - CVE-2020-14310 grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow
1860978 - CVE-2020-15705 grub2: Fail kernel validation without shim protocol
1861118 - CVE-2020-15706 grub2: Use-after-free redefining a function whilst the same function is already executing
1861581 - CVE-2020-15707 grub2: Integer overflow in initrd size handling
1861860 - grub2 should get resynced with 7.8 branch
6. Package List:
Red Hat Enterprise Linux Server AUS (v. 7.3):
Source:
grub2-2.02-0.86.el7.src.rpm
shim-15-8.el7.src.rpm
shim-signed-15-8.el7_3.src.rpm
noarch:
grub2-common-2.02-0.86.el7.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7.noarch.rpm
grub2-pc-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7.noarch.rpm
x86_64:
grub2-2.02-0.86.el7.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7.x86_64.rpm
grub2-efi-ia32-2.02-0.86.el7.x86_64.rpm
grub2-efi-x64-2.02-0.86.el7.x86_64.rpm
grub2-pc-2.02-0.86.el7.x86_64.rpm
grub2-tools-2.02-0.86.el7.x86_64.rpm
grub2-tools-extra-2.02-0.86.el7.x86_64.rpm
grub2-tools-minimal-2.02-0.86.el7.x86_64.rpm
mokutil-15-8.el7_3.x86_64.rpm
mokutil-debuginfo-15-8.el7_3.x86_64.rpm
shim-15-8.el7_3.x86_64.rpm
shim-unsigned-ia32-15-8.el7.x86_64.rpm
shim-unsigned-x64-15-8.el7.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.3):
Source:
grub2-2.02-0.86.el7.src.rpm
shim-15-8.el7.src.rpm
shim-signed-15-8.el7_3.src.rpm
noarch:
grub2-common-2.02-0.86.el7.noarch.rpm
grub2-efi-aa64-modules-2.02-0.86.el7.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7.noarch.rpm
grub2-pc-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7.noarch.rpm
ppc64le:
grub2-2.02-0.86.el7.ppc64le.rpm
grub2-debuginfo-2.02-0.86.el7.ppc64le.rpm
grub2-ppc64le-2.02-0.86.el7.ppc64le.rpm
grub2-tools-2.02-0.86.el7.ppc64le.rpm
grub2-tools-extra-2.02-0.86.el7.ppc64le.rpm
grub2-tools-minimal-2.02-0.86.el7.ppc64le.rpm
x86_64:
grub2-2.02-0.86.el7.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7.x86_64.rpm
grub2-efi-ia32-2.02-0.86.el7.x86_64.rpm
grub2-efi-ia32-cdboot-2.02-0.86.el7.x86_64.rpm
grub2-efi-x64-2.02-0.86.el7.x86_64.rpm
grub2-efi-x64-cdboot-2.02-0.86.el7.x86_64.rpm
grub2-pc-2.02-0.86.el7.x86_64.rpm
grub2-tools-2.02-0.86.el7.x86_64.rpm
grub2-tools-extra-2.02-0.86.el7.x86_64.rpm
grub2-tools-minimal-2.02-0.86.el7.x86_64.rpm
mokutil-15-8.el7_3.x86_64.rpm
mokutil-debuginfo-15-8.el7_3.x86_64.rpm
shim-15-8.el7_3.x86_64.rpm
shim-unsigned-ia32-15-8.el7.x86_64.rpm
shim-unsigned-x64-15-8.el7.x86_64.rpm
Red Hat Enterprise Linux Server TUS (v. 7.3):
Source:
grub2-2.02-0.86.el7.src.rpm
shim-15-8.el7.src.rpm
shim-signed-15-8.el7_3.src.rpm
noarch:
grub2-common-2.02-0.86.el7.noarch.rpm
grub2-efi-aa64-modules-2.02-0.86.el7.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7.noarch.rpm
grub2-pc-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7.noarch.rpm
x86_64:
grub2-2.02-0.86.el7.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7.x86_64.rpm
grub2-efi-ia32-2.02-0.86.el7.x86_64.rpm
grub2-efi-ia32-cdboot-2.02-0.86.el7.x86_64.rpm
grub2-efi-x64-2.02-0.86.el7.x86_64.rpm
grub2-efi-x64-cdboot-2.02-0.86.el7.x86_64.rpm
grub2-pc-2.02-0.86.el7.x86_64.rpm
grub2-tools-2.02-0.86.el7.x86_64.rpm
grub2-tools-extra-2.02-0.86.el7.x86_64.rpm
grub2-tools-minimal-2.02-0.86.el7.x86_64.rpm
mokutil-15-8.el7_3.x86_64.rpm
mokutil-debuginfo-15-8.el7_3.x86_64.rpm
shim-15-8.el7_3.x86_64.rpm
shim-unsigned-ia32-15-8.el7.x86_64.rpm
shim-unsigned-x64-15-8.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 7.3):
Source:
grub2-2.02-0.86.el7.src.rpm
shim-15-8.el7.src.rpm
noarch:
grub2-common-2.02-0.86.el7.noarch.rpm
grub2-efi-aa64-modules-2.02-0.86.el7.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7.noarch.rpm
grub2-pc-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7.noarch.rpm
x86_64:
grub2-2.02-0.86.el7.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7.x86_64.rpm
grub2-efi-ia32-2.02-0.86.el7.x86_64.rpm
grub2-efi-ia32-cdboot-2.02-0.86.el7.x86_64.rpm
grub2-efi-x64-2.02-0.86.el7.x86_64.rpm
grub2-efi-x64-cdboot-2.02-0.86.el7.x86_64.rpm
grub2-pc-2.02-0.86.el7.x86_64.rpm
grub2-tools-2.02-0.86.el7.x86_64.rpm
grub2-tools-extra-2.02-0.86.el7.x86_64.rpm
grub2-tools-minimal-2.02-0.86.el7.x86_64.rpm
shim-unsigned-ia32-15-8.el7.x86_64.rpm
shim-unsigned-x64-15-8.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional E4S (v. 7.3):
Source:
grub2-2.02-0.86.el7.src.rpm
shim-15-8.el7.src.rpm
noarch:
grub2-common-2.02-0.86.el7.noarch.rpm
grub2-efi-aa64-modules-2.02-0.86.el7.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7.noarch.rpm
grub2-pc-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7.noarch.rpm
ppc64le:
grub2-2.02-0.86.el7.ppc64le.rpm
grub2-debuginfo-2.02-0.86.el7.ppc64le.rpm
grub2-ppc64le-2.02-0.86.el7.ppc64le.rpm
grub2-tools-2.02-0.86.el7.ppc64le.rpm
grub2-tools-extra-2.02-0.86.el7.ppc64le.rpm
grub2-tools-minimal-2.02-0.86.el7.ppc64le.rpm
x86_64:
grub2-2.02-0.86.el7.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7.x86_64.rpm
grub2-efi-ia32-2.02-0.86.el7.x86_64.rpm
grub2-efi-ia32-cdboot-2.02-0.86.el7.x86_64.rpm
grub2-efi-x64-2.02-0.86.el7.x86_64.rpm
grub2-efi-x64-cdboot-2.02-0.86.el7.x86_64.rpm
grub2-pc-2.02-0.86.el7.x86_64.rpm
grub2-tools-2.02-0.86.el7.x86_64.rpm
grub2-tools-extra-2.02-0.86.el7.x86_64.rpm
grub2-tools-minimal-2.02-0.86.el7.x86_64.rpm
shim-unsigned-ia32-15-8.el7.x86_64.rpm
shim-unsigned-x64-15-8.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional TUS (v. 7.3):
Source:
grub2-2.02-0.86.el7.src.rpm
shim-15-8.el7.src.rpm
noarch:
grub2-common-2.02-0.86.el7.noarch.rpm
grub2-efi-aa64-modules-2.02-0.86.el7.noarch.rpm
grub2-efi-ia32-modules-2.02-0.86.el7.noarch.rpm
grub2-efi-x64-modules-2.02-0.86.el7.noarch.rpm
grub2-pc-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc64-modules-2.02-0.86.el7.noarch.rpm
grub2-ppc64le-modules-2.02-0.86.el7.noarch.rpm
x86_64:
grub2-2.02-0.86.el7.x86_64.rpm
grub2-debuginfo-2.02-0.86.el7.x86_64.rpm
grub2-efi-ia32-2.02-0.86.el7.x86_64.rpm
grub2-efi-ia32-cdboot-2.02-0.86.el7.x86_64.rpm
grub2-efi-x64-2.02-0.86.el7.x86_64.rpm
grub2-efi-x64-cdboot-2.02-0.86.el7.x86_64.rpm
grub2-pc-2.02-0.86.el7.x86_64.rpm
grub2-tools-2.02-0.86.el7.x86_64.rpm
grub2-tools-extra-2.02-0.86.el7.x86_64.rpm
grub2-tools-minimal-2.02-0.86.el7.x86_64.rpm
shim-unsigned-ia32-15-8.el7.x86_64.rpm
shim-unsigned-x64-15-8.el7.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-2020-10713
https://access.redhat.com/security/cve/CVE-2020-14308
https://access.redhat.com/security/cve/CVE-2020-14309
https://access.redhat.com/security/cve/CVE-2020-14310
https://access.redhat.com/security/cve/CVE-2020-14311
https://access.redhat.com/security/cve/CVE-2020-15705
https://access.redhat.com/security/cve/CVE-2020-15706
https://access.redhat.com/security/cve/CVE-2020-15707
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/security/vulnerabilities/grub2bootloader
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2020 Red Hat, Inc.
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