-----BEGIN PGP SIGNED MESSAGE----- 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 . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2020 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBXyf99tzjgjWX9erEAQiZ6RAAokK6LM/9MM6syKIOExWSIiWJaB0jdmwi p9PA+MmGY3BTaIgtHpbovjp2Mliyewv11ldpB9hjtNEe2zDbmOsmtBgTjWI3xENw 68M+wq7q9r1N5v6Mj9RIvqigmDU3M2c/i9XvDlv8f+AlbbG7XNbc14jt4a4Nrfmo ouwpiJeEnu5NA2sR2PFeSsybtc5nkb4AACAYwQpVoKnLO1Vj7CZnlEA8NcrcNf6W EPZuy4Lw5xisfQiuLERfwWDm2RRnO8vF8NwXkZY0DMbdxKx6mSeZOoSC6pzhTxs7 9ro98v/ETxEWOHA5ww6aqDuJJEVsO4xkjC2K59FP4H+uTiIts43slYWaBXbno+B+ ZDSVyHCvroPgymnPZge4mjQ8Xg1SijvDuLxgI+sGMlrAyYxbxUxHbortvABiFtfI LI/Pvx8PP934rWkiRB/8QXoYU2ycXYZaKt6e+AUal6NxmsuYE5Jogjnj0TWhPSL0 hcUz2xa8xn2FnUOZNUp1nYYDHcbUyfjI051+O/rk7+UC3hejklyxyuejOh6WmJiF d9+ptjelhOKWLDVAq4vLOPRhxNGtGsKWUbGhRR7hZzXYN2Zes4KUUhnJH4IIq1ZH 1A30+Uk23pLbOkJWkh6hNt2iZcOegEsHeJTQ1XiHjvoNGlUZVOz693bhz6boBN9z owBYPA0ZtQQ=zTsD -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce