-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: grub2 security update Advisory ID: RHSA-2021:0698-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:0698 Issue date: 2021-03-02 CVE Names: CVE-2020-14372 CVE-2020-25632 CVE-2020-25647 CVE-2020-27749 CVE-2020-27779 CVE-2021-20225 CVE-2021-20233 ===================================================================== 1. Summary: An update for grub2 is now available for Red Hat Enterprise Linux 8.1 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 BaseOS EUS (v. 8.1) - 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. Security Fix(es): * grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled (CVE-2020-14372) * grub2: Use-after-free in rmmod command (CVE-2020-25632) * grub2: Out-of-bounds write in grub_usb_device_initialize() (CVE-2020-25647) * grub2: Stack buffer overflow in grub_parser_split_cmdline() (CVE-2020-27749) * grub2: cutmem command allows privileged user to remove memory regions when Secure Boot is enabled (CVE-2020-27779) * grub2: Heap out-of-bounds write in short form option parser (CVE-2021-20225) * grub2: Heap out-of-bounds write due to miscalculation of space required for quoting (CVE-2021-20233) 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/): 1873150 - CVE-2020-14372 grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled 1879577 - CVE-2020-25632 grub2: Use-after-free in rmmod command 1886936 - CVE-2020-25647 grub2: Out-of-bounds write in grub_usb_device_initialize() 1899966 - CVE-2020-27749 grub2: Stack buffer overflow in grub_parser_split_cmdline() 1900698 - CVE-2020-27779 grub2: cutmem command allows privileged user to remove memory regions when Secure Boot is enabled 1924696 - CVE-2021-20225 grub2: Heap out-of-bounds write in short form option parser 1926263 - CVE-2021-20233 grub2: Heap out-of-bounds write due to miscalculation of space required for quoting 6. Package List: Red Hat Enterprise Linux BaseOS EUS (v. 8.1): Source: grub2-2.02-87.el8_1.2.src.rpm aarch64: grub2-debuginfo-2.02-87.el8_1.2.aarch64.rpm grub2-debugsource-2.02-87.el8_1.2.aarch64.rpm grub2-efi-aa64-2.02-87.el8_1.2.aarch64.rpm grub2-efi-aa64-cdboot-2.02-87.el8_1.2.aarch64.rpm grub2-tools-2.02-87.el8_1.2.aarch64.rpm grub2-tools-debuginfo-2.02-87.el8_1.2.aarch64.rpm grub2-tools-extra-2.02-87.el8_1.2.aarch64.rpm grub2-tools-extra-debuginfo-2.02-87.el8_1.2.aarch64.rpm grub2-tools-minimal-2.02-87.el8_1.2.aarch64.rpm grub2-tools-minimal-debuginfo-2.02-87.el8_1.2.aarch64.rpm noarch: grub2-common-2.02-87.el8_1.2.noarch.rpm grub2-efi-aa64-modules-2.02-87.el8_1.2.noarch.rpm grub2-efi-ia32-modules-2.02-87.el8_1.2.noarch.rpm grub2-efi-x64-modules-2.02-87.el8_1.2.noarch.rpm grub2-pc-modules-2.02-87.el8_1.2.noarch.rpm grub2-ppc64le-modules-2.02-87.el8_1.2.noarch.rpm ppc64le: grub2-debuginfo-2.02-87.el8_1.2.ppc64le.rpm grub2-debugsource-2.02-87.el8_1.2.ppc64le.rpm grub2-ppc64le-2.02-87.el8_1.2.ppc64le.rpm grub2-tools-2.02-87.el8_1.2.ppc64le.rpm grub2-tools-debuginfo-2.02-87.el8_1.2.ppc64le.rpm grub2-tools-extra-2.02-87.el8_1.2.ppc64le.rpm grub2-tools-extra-debuginfo-2.02-87.el8_1.2.ppc64le.rpm grub2-tools-minimal-2.02-87.el8_1.2.ppc64le.rpm grub2-tools-minimal-debuginfo-2.02-87.el8_1.2.ppc64le.rpm x86_64: grub2-debuginfo-2.02-87.el8_1.2.x86_64.rpm grub2-debugsource-2.02-87.el8_1.2.x86_64.rpm grub2-efi-ia32-2.02-87.el8_1.2.x86_64.rpm grub2-efi-ia32-cdboot-2.02-87.el8_1.2.x86_64.rpm grub2-efi-x64-2.02-87.el8_1.2.x86_64.rpm grub2-efi-x64-cdboot-2.02-87.el8_1.2.x86_64.rpm grub2-pc-2.02-87.el8_1.2.x86_64.rpm grub2-tools-2.02-87.el8_1.2.x86_64.rpm grub2-tools-debuginfo-2.02-87.el8_1.2.x86_64.rpm grub2-tools-efi-2.02-87.el8_1.2.x86_64.rpm grub2-tools-efi-debuginfo-2.02-87.el8_1.2.x86_64.rpm grub2-tools-extra-2.02-87.el8_1.2.x86_64.rpm grub2-tools-extra-debuginfo-2.02-87.el8_1.2.x86_64.rpm grub2-tools-minimal-2.02-87.el8_1.2.x86_64.rpm grub2-tools-minimal-debuginfo-2.02-87.el8_1.2.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-2020-14372 https://access.redhat.com/security/cve/CVE-2020-25632 https://access.redhat.com/security/cve/CVE-2020-25647 https://access.redhat.com/security/cve/CVE-2020-27749 https://access.redhat.com/security/cve/CVE-2020-27779 https://access.redhat.com/security/cve/CVE-2021-20225 https://access.redhat.com/security/cve/CVE-2021-20233 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/security/vulnerabilities/RHSB-2021-003 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2021 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYD6PetzjgjWX9erEAQge4w//X4LMCgdEyddzAjEadldbcx361X9s8q2p ui87hEkTHzOfw0jHNauUAbbDyq/pWY1ADFIxYBrrGwGslLQevjdR4vm/JnD0xl6N vHw/+XndfvvMhAdB7yfcTfUVdIDdTEzQq9SXHAYhCWom789aa0di6eiOiStvJhAs mEZKJyHsdW/M7GXggvY7Q8zGzJgN4P82xTo32hlpkd0Jr509MXFQqv25kxcqBGV6 p2xSnbuXLQyiP23Y3f1EeMd4sUVISaaBvS6Ddtu88k8cQiwixovTQB2BqUraMwuJ JaPmy9V/BI1E41+b2A68qX3IPstVeS8OS9iGxREeovfzEJpmOSlWiCUX6vrOJSJD FRGujC1Bj9iKfjwC3Zxy3oRCKrx8e3JiuCzE2t07PQEffJLu7MO/NvzBhkkcnPGy j6vfraUp5/Rf7YelerNfjPTm2RNbfMuHX1v6VUN8m97BFFRJCFC4ZaDg35bSn4m4 NzbPDMKUV11RRzHeV1Uyb1PSO2EGuFGbXS/01e1IQ6Akiu6BBIk/Gg7wjmx2wQOr r87Jq7SmUN1mv4YBE/m8hwnD1IWn5UCDKbGEjXdbx78GuK/WpRezXPm2hpU57qtA k3s+tFSJ/Cz6c/nwXNsS1pir+EUUmjRHxCAuAtYXb1zl9koDiy+F2GjEoSFvhKWr 3OBAZ4E5qzA= =DeYj -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce