-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Low: grub2 security, bug fix, and enhancement update Advisory ID: RHSA-2022:2110-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2022:2110 Issue date: 2022-05-10 CVE Names: CVE-2021-3981 ===================================================================== 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 Low. 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: Incorrect permission in grub.cfg allow unprivileged user to read the file content (CVE-2021-3981) 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. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.6 Release Notes linked from 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/): 1809246 - [RFE] GRUB does not consider information from proxy dhcp server 1899903 - grub2-mkconfig is never run on kernel upgrade even if GRUB_ENABLE_BLSCFG=false 1914575 - grub-boot-success.service should not be started inside systemd-nspawn container 2016269 - RPM grub2-tools-minimal is shipping prelink config files although prelink is absent in rhel8 2020927 - GRUB_TERMINAL_INPUT=at_keyboard makes grub stay on boot menu instead of starting the timeout 2024170 - CVE-2021-3981 grub2: Incorrect permission in grub.cfg allow unprivileged user to read the file content 2048904 - Cannot EFI chainload onto local disk when EFI partition is in Software Raid 2061252 - grub on OpenFirmware : search --hint-ieee1275= does not work 2069157 - grub2 signed by Red Hat Test Certificate 6. Package List: Red Hat Enterprise Linux BaseOS (v. 8): Source: grub2-2.02-123.el8.src.rpm aarch64: grub2-debuginfo-2.02-123.el8.aarch64.rpm grub2-debugsource-2.02-123.el8.aarch64.rpm grub2-efi-aa64-2.02-123.el8.aarch64.rpm grub2-efi-aa64-cdboot-2.02-123.el8.aarch64.rpm grub2-tools-2.02-123.el8.aarch64.rpm grub2-tools-debuginfo-2.02-123.el8.aarch64.rpm grub2-tools-extra-2.02-123.el8.aarch64.rpm grub2-tools-extra-debuginfo-2.02-123.el8.aarch64.rpm grub2-tools-minimal-2.02-123.el8.aarch64.rpm grub2-tools-minimal-debuginfo-2.02-123.el8.aarch64.rpm noarch: grub2-common-2.02-123.el8.noarch.rpm grub2-efi-aa64-modules-2.02-123.el8.noarch.rpm grub2-efi-ia32-modules-2.02-123.el8.noarch.rpm grub2-efi-x64-modules-2.02-123.el8.noarch.rpm grub2-pc-modules-2.02-123.el8.noarch.rpm grub2-ppc64le-modules-2.02-123.el8.noarch.rpm ppc64le: grub2-debuginfo-2.02-123.el8.ppc64le.rpm grub2-debugsource-2.02-123.el8.ppc64le.rpm grub2-ppc64le-2.02-123.el8.ppc64le.rpm grub2-tools-2.02-123.el8.ppc64le.rpm grub2-tools-debuginfo-2.02-123.el8.ppc64le.rpm grub2-tools-extra-2.02-123.el8.ppc64le.rpm grub2-tools-extra-debuginfo-2.02-123.el8.ppc64le.rpm grub2-tools-minimal-2.02-123.el8.ppc64le.rpm grub2-tools-minimal-debuginfo-2.02-123.el8.ppc64le.rpm x86_64: grub2-debuginfo-2.02-123.el8.x86_64.rpm grub2-debugsource-2.02-123.el8.x86_64.rpm grub2-efi-ia32-2.02-123.el8.x86_64.rpm grub2-efi-ia32-cdboot-2.02-123.el8.x86_64.rpm grub2-efi-x64-2.02-123.el8.x86_64.rpm grub2-efi-x64-cdboot-2.02-123.el8.x86_64.rpm grub2-pc-2.02-123.el8.x86_64.rpm grub2-tools-2.02-123.el8.x86_64.rpm grub2-tools-debuginfo-2.02-123.el8.x86_64.rpm grub2-tools-efi-2.02-123.el8.x86_64.rpm grub2-tools-efi-debuginfo-2.02-123.el8.x86_64.rpm grub2-tools-extra-2.02-123.el8.x86_64.rpm grub2-tools-extra-debuginfo-2.02-123.el8.x86_64.rpm grub2-tools-minimal-2.02-123.el8.x86_64.rpm grub2-tools-minimal-debuginfo-2.02-123.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-2021-3981 https://access.redhat.com/security/updates/classification/#low https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.6_release_notes/ 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2022 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYnqRstzjgjWX9erEAQgbGA//Yt1p6YQS2BSVdTiseVPgoc+JJui5N5wn /YkZy6vGvKSdtaYNegyb4arqW8+qIbLrlNF5j1p16nrZ2a+ONRFxozO866M1FIXa Lc6edJKULuW20398JD7Txu4mYnTZO692HLHSYvTsadS6wF+oXm1NqoTnaQBJM6F+ MiTxXE6iOb247LTNElA2Zqq+0qGR4EJ84DNmF82Y4OVmcawCpCmVQFPNXRasfhNl EqKuhGvt3vRCW5VY51b6nwC5b+AiAClFkIIlkfaurqgZzPInnX0fZyrO41Jy81So ECK+ZZlOpZDhh8r6XnjPVvzVHwY8iG3LvAPvG3UWqwcXViRUheajdL2LhJyPjg9j sf2Q+eVrf9WfKGWdPHsw1+bu08ebHkKdAth6psW7QuUuCjj4AW+X2amm0jE/eFUi SLiSfh3V7rhpLWaPg+S4ptTyuAswpkXR2smMBmljojfx3wGvJVelO+183asFHR4B +aXSxw05jkiwNZB+7TMdhNiiKkC7TagxeQcMqMqD+yvk8mOeTBNafG7WzbyLO8io HFn8VrzXWc3RHJcyMT3oeR6bBVM3ro1mm8BOiikK1nFwNJtkT0ct+Yj9glwUXmGy EAQempaqwkyyrYtmrIdDu2pp07bO2/LHHloDm4JF3V8bHfWlHc/IPEP6QiibSx5P Q+YUwE3ShUs= =ZVXv -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce