-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: grub2 security update Advisory ID: RHSA-2021:0696-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:0696 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. 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 (v. 8) - 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 (v. 8): Source: grub2-2.02-90.el8_3.1.src.rpm aarch64: grub2-debuginfo-2.02-90.el8_3.1.aarch64.rpm grub2-debugsource-2.02-90.el8_3.1.aarch64.rpm grub2-efi-aa64-2.02-90.el8_3.1.aarch64.rpm grub2-efi-aa64-cdboot-2.02-90.el8_3.1.aarch64.rpm grub2-tools-2.02-90.el8_3.1.aarch64.rpm grub2-tools-debuginfo-2.02-90.el8_3.1.aarch64.rpm grub2-tools-extra-2.02-90.el8_3.1.aarch64.rpm grub2-tools-extra-debuginfo-2.02-90.el8_3.1.aarch64.rpm grub2-tools-minimal-2.02-90.el8_3.1.aarch64.rpm grub2-tools-minimal-debuginfo-2.02-90.el8_3.1.aarch64.rpm noarch: grub2-common-2.02-90.el8_3.1.noarch.rpm grub2-efi-aa64-modules-2.02-90.el8_3.1.noarch.rpm grub2-efi-ia32-modules-2.02-90.el8_3.1.noarch.rpm grub2-efi-x64-modules-2.02-90.el8_3.1.noarch.rpm grub2-pc-modules-2.02-90.el8_3.1.noarch.rpm grub2-ppc64le-modules-2.02-90.el8_3.1.noarch.rpm ppc64le: grub2-debuginfo-2.02-90.el8_3.1.ppc64le.rpm grub2-debugsource-2.02-90.el8_3.1.ppc64le.rpm grub2-ppc64le-2.02-90.el8_3.1.ppc64le.rpm grub2-tools-2.02-90.el8_3.1.ppc64le.rpm grub2-tools-debuginfo-2.02-90.el8_3.1.ppc64le.rpm grub2-tools-extra-2.02-90.el8_3.1.ppc64le.rpm grub2-tools-extra-debuginfo-2.02-90.el8_3.1.ppc64le.rpm grub2-tools-minimal-2.02-90.el8_3.1.ppc64le.rpm grub2-tools-minimal-debuginfo-2.02-90.el8_3.1.ppc64le.rpm x86_64: grub2-debuginfo-2.02-90.el8_3.1.x86_64.rpm grub2-debugsource-2.02-90.el8_3.1.x86_64.rpm grub2-efi-ia32-2.02-90.el8_3.1.x86_64.rpm grub2-efi-ia32-cdboot-2.02-90.el8_3.1.x86_64.rpm grub2-efi-x64-2.02-90.el8_3.1.x86_64.rpm grub2-efi-x64-cdboot-2.02-90.el8_3.1.x86_64.rpm grub2-pc-2.02-90.el8_3.1.x86_64.rpm grub2-tools-2.02-90.el8_3.1.x86_64.rpm grub2-tools-debuginfo-2.02-90.el8_3.1.x86_64.rpm grub2-tools-efi-2.02-90.el8_3.1.x86_64.rpm grub2-tools-efi-debuginfo-2.02-90.el8_3.1.x86_64.rpm grub2-tools-extra-2.02-90.el8_3.1.x86_64.rpm grub2-tools-extra-debuginfo-2.02-90.el8_3.1.x86_64.rpm grub2-tools-minimal-2.02-90.el8_3.1.x86_64.rpm grub2-tools-minimal-debuginfo-2.02-90.el8_3.1.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 iQIVAwUBYD6QatzjgjWX9erEAQh0Ug/+IYvhtbOMTb2cmlPCjA1mTMirtfRT4kC0 qLh1KnUws4H8mT/uUDIJ19xcCujBmtYWpv63BPRxRxUYIdLGWQk7zTOYwwSvXnSG 1uMRZXdg8lH5Vyb4AitHW/d42eD/sblWGIZuuO8dhUcaXVJF7NnE6Er5qa4cblcM +pv3Q5PrBIGSGiM0hSiaAvd6Ph7R/iiGz2kSE5PGD/XthWsV6vtK2nZoFI4Rx+Wm X9VFlzuveXSYCv5IL2R19+pnDfqcWXuZXLTVJBuB9hBW3GKaBvBdxPvVPHAgGuBa HdNTsuM0MlxlKRYX7/luKUBB5Woht1PZg40ikL+jLVe1CR1rdkiXkU3ECEhqhbqo avmyAsDd8PMr5JUyOpwUrxOoAEZgibLvZtUemp3WRp8ViI+8o7feQ8r4zKHu6H/7 9DtVn5ZOT6BTeTEAyIWrOnM/O1Q+epgJ0vprGK7+Jau5HG8DxF/lXnnJeNJlN65F BsFg98DRwlAmwoYPGYCPWN0XgMHUhP1ykGkf+FI4nQXM5uTtfiEi28E7t3HM2CS2 +39sxjCrgG+PY6gG7bHDZEYPoNYKWfpScVU+JVkp2eHKGwS046/Oxx/GX4aOQGrO 2Rsi2pb8WIcxLqqXsBmsD0VLIvWb9qGj1SojvNvYxy64KaazGlypuCpJ+h8LDYKn y8b8pQ+T4sY= =3GJr -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce