-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: grub2 security update Advisory ID: RHSA-2021:0697-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:0697 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 8.2 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. 8.2) - 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. 8.2): Source: grub2-2.02-87.el8_2.3.src.rpm aarch64: grub2-debuginfo-2.02-87.el8_2.3.aarch64.rpm grub2-debugsource-2.02-87.el8_2.3.aarch64.rpm grub2-efi-aa64-2.02-87.el8_2.3.aarch64.rpm grub2-efi-aa64-cdboot-2.02-87.el8_2.3.aarch64.rpm grub2-tools-2.02-87.el8_2.3.aarch64.rpm grub2-tools-debuginfo-2.02-87.el8_2.3.aarch64.rpm grub2-tools-extra-2.02-87.el8_2.3.aarch64.rpm grub2-tools-extra-debuginfo-2.02-87.el8_2.3.aarch64.rpm grub2-tools-minimal-2.02-87.el8_2.3.aarch64.rpm grub2-tools-minimal-debuginfo-2.02-87.el8_2.3.aarch64.rpm noarch: grub2-common-2.02-87.el8_2.3.noarch.rpm grub2-efi-aa64-modules-2.02-87.el8_2.3.noarch.rpm grub2-efi-ia32-modules-2.02-87.el8_2.3.noarch.rpm grub2-efi-x64-modules-2.02-87.el8_2.3.noarch.rpm grub2-pc-modules-2.02-87.el8_2.3.noarch.rpm grub2-ppc64le-modules-2.02-87.el8_2.3.noarch.rpm ppc64le: grub2-debuginfo-2.02-87.el8_2.3.ppc64le.rpm grub2-debugsource-2.02-87.el8_2.3.ppc64le.rpm grub2-ppc64le-2.02-87.el8_2.3.ppc64le.rpm grub2-tools-2.02-87.el8_2.3.ppc64le.rpm grub2-tools-debuginfo-2.02-87.el8_2.3.ppc64le.rpm grub2-tools-extra-2.02-87.el8_2.3.ppc64le.rpm grub2-tools-extra-debuginfo-2.02-87.el8_2.3.ppc64le.rpm grub2-tools-minimal-2.02-87.el8_2.3.ppc64le.rpm grub2-tools-minimal-debuginfo-2.02-87.el8_2.3.ppc64le.rpm x86_64: grub2-debuginfo-2.02-87.el8_2.3.x86_64.rpm grub2-debugsource-2.02-87.el8_2.3.x86_64.rpm grub2-efi-ia32-2.02-87.el8_2.3.x86_64.rpm grub2-efi-ia32-cdboot-2.02-87.el8_2.3.x86_64.rpm grub2-efi-x64-2.02-87.el8_2.3.x86_64.rpm grub2-efi-x64-cdboot-2.02-87.el8_2.3.x86_64.rpm grub2-pc-2.02-87.el8_2.3.x86_64.rpm grub2-tools-2.02-87.el8_2.3.x86_64.rpm grub2-tools-debuginfo-2.02-87.el8_2.3.x86_64.rpm grub2-tools-efi-2.02-87.el8_2.3.x86_64.rpm grub2-tools-efi-debuginfo-2.02-87.el8_2.3.x86_64.rpm grub2-tools-extra-2.02-87.el8_2.3.x86_64.rpm grub2-tools-extra-debuginfo-2.02-87.el8_2.3.x86_64.rpm grub2-tools-minimal-2.02-87.el8_2.3.x86_64.rpm grub2-tools-minimal-debuginfo-2.02-87.el8_2.3.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 iQIVAwUBYD6RWtzjgjWX9erEAQjDVBAAll/r87pivtt3V84bMVZ3zr+/IzHvSSuW o8AEALAmamACgM2gjj9mp5oATW5YTDmMMfFtLQfaoZwKWwsEkrTWo3WuaryxADYb ZBTWrCTNYfHfJ2NOBg8XmKzrrOt8/yRq20P+I4jQ4KI2JrS2udP1tvcZcaDeq8nI 49oZy/J58sGymHbUUF4j5Y1H3Y77ceuRJQO72qcfuSUQdD+t8KD4A4inmKbu2rOO 3xHAuyprEA7uhY3bJ58iP5RxROXX7Q6mPSQeEFNY6WG0R3zaBcekrSuktiqxlMgR ix/yTCD/pQZmZ6zg3T3ad5zD6mALsMYm3KEyJ+JW5uNFVmmIifae2XBKvPAiUfim UkyLvhhBJraEMy1dvOzRGfqNSI/vvhpvpWuex6a5cJIdFvJtg5b4kvP+kqe3NeGt 750f9nezqgw8hz81k1HsgCV6PCt9cukX75XxxfWGv0Y2hwm7UKQiMdKUrFDj41Mk ph9c0oto1Sm8lYx7WV/dpatoAjxLuhcJIHPsjvpxbOgU4irQjU/sgOsFSF7qUvUR 5zRhznrkM2bqkOd8tDe6D+hKjBV/wlekiZf6jyGSdcLuIndgIt+8o0GotktqqwoP FHFYKZZC+hQOXzcL9Sjnaa4Tx5+j8hnOOxkqgsxfh4DhFaO4BOMtK3NYdV4nPgfO jxzIzwEDuJQ= =TS/o -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce