-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Moderate: grub2 security and bug fix update Advisory ID: RHSA-2020:3271-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2020:3271 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 7.6 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. 7.6) - noarch, x86_64 Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) - noarch, x86_64 Red Hat Enterprise Linux Server EUS (v. 7.6) - noarch, ppc64, ppc64le, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 7.6) - noarch, x86_64 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, noarch, ppc64le Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, noarch 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#1861857) 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 1861857 - grub2 should get resynced with 7.8 branch 6. Package List: Red Hat Enterprise Linux ComputeNode EUS (v. 7.6): Source: fwupdate-12-6.el7_6.src.rpm grub2-2.02-0.86.el7_6.src.rpm shim-15-8.el7.src.rpm shim-signed-15-8.el7_6.src.rpm noarch: grub2-common-2.02-0.86.el7_6.noarch.rpm grub2-efi-ia32-modules-2.02-0.86.el7_6.noarch.rpm grub2-efi-x64-modules-2.02-0.86.el7_6.noarch.rpm grub2-pc-modules-2.02-0.86.el7_6.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_6.x86_64.rpm fwupdate-debuginfo-12-6.el7_6.x86_64.rpm fwupdate-efi-12-6.el7_6.x86_64.rpm fwupdate-libs-12-6.el7_6.x86_64.rpm grub2-2.02-0.86.el7_6.x86_64.rpm grub2-debuginfo-2.02-0.86.el7_6.x86_64.rpm grub2-efi-ia32-2.02-0.86.el7_6.x86_64.rpm grub2-efi-x64-2.02-0.86.el7_6.x86_64.rpm grub2-pc-2.02-0.86.el7_6.x86_64.rpm grub2-tools-2.02-0.86.el7_6.x86_64.rpm grub2-tools-extra-2.02-0.86.el7_6.x86_64.rpm grub2-tools-minimal-2.02-0.86.el7_6.x86_64.rpm mokutil-15-8.el7_6.x86_64.rpm mokutil-debuginfo-15-8.el7_6.x86_64.rpm shim-ia32-15-8.el7_6.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_6.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6): noarch: grub2-efi-aa64-modules-2.02-0.86.el7_6.noarch.rpm grub2-ppc-modules-2.02-0.86.el7_6.noarch.rpm grub2-ppc64-modules-2.02-0.86.el7_6.noarch.rpm grub2-ppc64le-modules-2.02-0.86.el7_6.noarch.rpm x86_64: fwupdate-debuginfo-12-6.el7_6.x86_64.rpm fwupdate-devel-12-6.el7_6.x86_64.rpm grub2-debuginfo-2.02-0.86.el7_6.x86_64.rpm grub2-efi-ia32-cdboot-2.02-0.86.el7_6.x86_64.rpm grub2-efi-x64-cdboot-2.02-0.86.el7_6.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 7.6): Source: fwupdate-12-6.el7_6.src.rpm grub2-2.02-0.86.el7_6.src.rpm shim-15-8.el7.src.rpm shim-signed-15-8.el7_6.src.rpm noarch: grub2-common-2.02-0.86.el7_6.noarch.rpm grub2-efi-ia32-modules-2.02-0.86.el7_6.noarch.rpm grub2-efi-x64-modules-2.02-0.86.el7_6.noarch.rpm grub2-pc-modules-2.02-0.86.el7_6.noarch.rpm grub2-ppc64-modules-2.02-0.86.el7_6.noarch.rpm grub2-ppc64le-modules-2.02-0.86.el7_6.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_6.ppc64.rpm grub2-debuginfo-2.02-0.86.el7_6.ppc64.rpm grub2-ppc64-2.02-0.86.el7_6.ppc64.rpm grub2-tools-2.02-0.86.el7_6.ppc64.rpm grub2-tools-extra-2.02-0.86.el7_6.ppc64.rpm grub2-tools-minimal-2.02-0.86.el7_6.ppc64.rpm ppc64le: grub2-2.02-0.86.el7_6.ppc64le.rpm grub2-debuginfo-2.02-0.86.el7_6.ppc64le.rpm grub2-ppc64le-2.02-0.86.el7_6.ppc64le.rpm grub2-tools-2.02-0.86.el7_6.ppc64le.rpm grub2-tools-extra-2.02-0.86.el7_6.ppc64le.rpm grub2-tools-minimal-2.02-0.86.el7_6.ppc64le.rpm x86_64: fwupdate-12-6.el7_6.x86_64.rpm fwupdate-debuginfo-12-6.el7_6.x86_64.rpm fwupdate-efi-12-6.el7_6.x86_64.rpm fwupdate-libs-12-6.el7_6.x86_64.rpm grub2-2.02-0.86.el7_6.x86_64.rpm grub2-debuginfo-2.02-0.86.el7_6.x86_64.rpm grub2-efi-ia32-2.02-0.86.el7_6.x86_64.rpm grub2-efi-x64-2.02-0.86.el7_6.x86_64.rpm grub2-pc-2.02-0.86.el7_6.x86_64.rpm grub2-tools-2.02-0.86.el7_6.x86_64.rpm grub2-tools-extra-2.02-0.86.el7_6.x86_64.rpm grub2-tools-minimal-2.02-0.86.el7_6.x86_64.rpm mokutil-15-8.el7_6.x86_64.rpm mokutil-debuginfo-15-8.el7_6.x86_64.rpm shim-ia32-15-8.el7_6.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_6.x86_64.rpm Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7): Source: fwupdate-12-6.el7_6.src.rpm grub2-2.02-0.86.el7_6.src.rpm shim-15-8.el7.src.rpm shim-signed-15-8.el7_6.src.rpm aarch64: fwupdate-12-6.el7_6.aarch64.rpm fwupdate-debuginfo-12-6.el7_6.aarch64.rpm fwupdate-efi-12-6.el7_6.aarch64.rpm fwupdate-libs-12-6.el7_6.aarch64.rpm grub2-2.02-0.86.el7_6.aarch64.rpm grub2-debuginfo-2.02-0.86.el7_6.aarch64.rpm grub2-efi-aa64-2.02-0.86.el7_6.aarch64.rpm grub2-tools-2.02-0.86.el7_6.aarch64.rpm grub2-tools-extra-2.02-0.86.el7_6.aarch64.rpm grub2-tools-minimal-2.02-0.86.el7_6.aarch64.rpm mokutil-15-8.el7_6.aarch64.rpm mokutil-debuginfo-15-8.el7_6.aarch64.rpm shim-aa64-15-8.el7_6.aarch64.rpm shim-unsigned-aa64-15-8.el7.aarch64.rpm noarch: grub2-common-2.02-0.86.el7_6.noarch.rpm grub2-efi-aa64-modules-2.02-0.86.el7_6.noarch.rpm grub2-ppc64le-modules-2.02-0.86.el7_6.noarch.rpm shim-unsigned-ia32-debuginfo-15-8.el7.noarch.rpm shim-unsigned-x64-debuginfo-15-8.el7.noarch.rpm ppc64le: grub2-2.02-0.86.el7_6.ppc64le.rpm grub2-debuginfo-2.02-0.86.el7_6.ppc64le.rpm grub2-ppc64le-2.02-0.86.el7_6.ppc64le.rpm grub2-tools-2.02-0.86.el7_6.ppc64le.rpm grub2-tools-extra-2.02-0.86.el7_6.ppc64le.rpm grub2-tools-minimal-2.02-0.86.el7_6.ppc64le.rpm Red Hat Enterprise Linux Server Optional EUS (v. 7.6): noarch: grub2-efi-aa64-modules-2.02-0.86.el7_6.noarch.rpm grub2-efi-ia32-modules-2.02-0.86.el7_6.noarch.rpm grub2-efi-x64-modules-2.02-0.86.el7_6.noarch.rpm grub2-pc-modules-2.02-0.86.el7_6.noarch.rpm grub2-ppc-modules-2.02-0.86.el7_6.noarch.rpm grub2-ppc64-modules-2.02-0.86.el7_6.noarch.rpm grub2-ppc64le-modules-2.02-0.86.el7_6.noarch.rpm x86_64: fwupdate-debuginfo-12-6.el7_6.x86_64.rpm fwupdate-devel-12-6.el7_6.x86_64.rpm grub2-debuginfo-2.02-0.86.el7_6.x86_64.rpm grub2-efi-ia32-cdboot-2.02-0.86.el7_6.x86_64.rpm grub2-efi-x64-cdboot-2.02-0.86.el7_6.x86_64.rpm Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7): aarch64: fwupdate-debuginfo-12-6.el7_6.aarch64.rpm fwupdate-devel-12-6.el7_6.aarch64.rpm grub2-debuginfo-2.02-0.86.el7_6.aarch64.rpm grub2-efi-aa64-cdboot-2.02-0.86.el7_6.aarch64.rpm noarch: grub2-efi-aa64-modules-2.02-0.86.el7_6.noarch.rpm grub2-efi-ia32-modules-2.02-0.86.el7_6.noarch.rpm grub2-efi-x64-modules-2.02-0.86.el7_6.noarch.rpm grub2-pc-modules-2.02-0.86.el7_6.noarch.rpm grub2-ppc-modules-2.02-0.86.el7_6.noarch.rpm grub2-ppc64-modules-2.02-0.86.el7_6.noarch.rpm grub2-ppc64le-modules-2.02-0.86.el7_6.noarch.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 iQIVAwUBXyf6r9zjgjWX9erEAQiXZhAAmvxv+vP97tlFRXnk9Ymwi66zj8hupZLD qT9AB2KzcXnSqTehHuvjPQh2Ie8mjK3VXSWCUC2QUUc34kPRDNNHKtyuv6eI6kri wJHR+Qgxce4rxUkOG22Ttum7taZtVj1IW0fVGOWv2ChEStbF/BDVqW4Pawb2wuCw LxYSIKNX4coRMc+b5YBCA3BzkbjJbO7kPco1DZG0xkKK08tulhSLW2k2gwfihl6b SLjIg7Vl+rJzKMg6tU0I7M9yo/hq8ullxChlTS9pgpHyrEsXOKeSuhNfBPF1r8a5 lqz5J6pmMzmyl3MApumSFg9XKYZOLSKoZiDeEmuGsR46kbVCdRQazj8sVebAPcAg obDqwX1cfjbBzGmPa4nKb02514wVwwWiY5Q8hPDCLYOPlzNxtramIoT5Ub4GHjTr 1MhddnQVYvPGZNkKCIYh4a1Z6uQQnhGfzRBpvccOT4bV40QqT89xup/nfru2JmpG m/c+uQ+Bdexbf6lMUHqSd26i7ISMeCA0hmgXUTaHvNpW3pGS8dMCAG/ladeENER3 rbSkqJs+SchpbPMr7S6KFPfkiEjTMEWOAqWt6hs62wyrTI6nK8SvXgNlnTY8WkGg pUeK/eNXC7qR1wezBlVBDnv3PxRlG7UWwwb/wILH5YQvjGm7myCh6cxhtaGJ6c9l 7Lyoh+eRNws=x0C3 -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce