-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Moderate: grub2 security and bug fix update Advisory ID: RHSA-2020:3275-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2020:3275 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 7.4 Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update Support, and Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions. 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 Server AUS (v. 7.4) - noarch, x86_64 Red Hat Enterprise Linux Server E4S (v. 7.4) - noarch, ppc64le, x86_64 Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - noarch, x86_64 Red Hat Enterprise Linux Server Optional E4S (v. 7.4) - noarch, x86_64 Red Hat Enterprise Linux Server Optional TUS (v. 7.4) - noarch, x86_64 Red Hat Enterprise Linux Server TUS (v. 7.4) - 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#1861858) 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 1861858 - grub2 should get resynced with 7.8 branch 6. Package List: Red Hat Enterprise Linux Server AUS (v. 7.4): Source: fwupdate-9-10.el7_4.src.rpm grub2-2.02-0.86.el7_4.src.rpm shim-15-8.el7.src.rpm shim-signed-15-8.el7_4.src.rpm noarch: grub2-common-2.02-0.86.el7_4.noarch.rpm grub2-efi-ia32-modules-2.02-0.86.el7_4.noarch.rpm grub2-efi-x64-modules-2.02-0.86.el7_4.noarch.rpm grub2-pc-modules-2.02-0.86.el7_4.noarch.rpm shim-unsigned-ia32-debuginfo-15-8.el7.noarch.rpm shim-unsigned-x64-debuginfo-15-8.el7.noarch.rpm x86_64: fwupdate-debuginfo-9-10.el7_4.x86_64.rpm fwupdate-efi-9-10.el7_4.x86_64.rpm fwupdate-libs-9-10.el7_4.x86_64.rpm grub2-2.02-0.86.el7_4.x86_64.rpm grub2-debuginfo-2.02-0.86.el7_4.x86_64.rpm grub2-efi-ia32-2.02-0.86.el7_4.x86_64.rpm grub2-efi-x64-2.02-0.86.el7_4.x86_64.rpm grub2-pc-2.02-0.86.el7_4.x86_64.rpm grub2-tools-2.02-0.86.el7_4.x86_64.rpm grub2-tools-extra-2.02-0.86.el7_4.x86_64.rpm grub2-tools-minimal-2.02-0.86.el7_4.x86_64.rpm mokutil-15-8.el7_4.x86_64.rpm mokutil-debuginfo-15-8.el7_4.x86_64.rpm shim-ia32-15-8.el7_4.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_4.x86_64.rpm Red Hat Enterprise Linux Server E4S (v. 7.4): Source: fwupdate-9-10.el7_4.src.rpm grub2-2.02-0.86.el7_4.src.rpm shim-15-8.el7.src.rpm shim-signed-15-8.el7_4.src.rpm noarch: grub2-common-2.02-0.86.el7_4.noarch.rpm grub2-efi-ia32-modules-2.02-0.86.el7_4.noarch.rpm grub2-efi-x64-modules-2.02-0.86.el7_4.noarch.rpm grub2-pc-modules-2.02-0.86.el7_4.noarch.rpm grub2-ppc64le-modules-2.02-0.86.el7_4.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_4.ppc64le.rpm grub2-debuginfo-2.02-0.86.el7_4.ppc64le.rpm grub2-ppc64le-2.02-0.86.el7_4.ppc64le.rpm grub2-tools-2.02-0.86.el7_4.ppc64le.rpm grub2-tools-extra-2.02-0.86.el7_4.ppc64le.rpm grub2-tools-minimal-2.02-0.86.el7_4.ppc64le.rpm x86_64: fwupdate-debuginfo-9-10.el7_4.x86_64.rpm fwupdate-efi-9-10.el7_4.x86_64.rpm fwupdate-libs-9-10.el7_4.x86_64.rpm grub2-2.02-0.86.el7_4.x86_64.rpm grub2-debuginfo-2.02-0.86.el7_4.x86_64.rpm grub2-efi-ia32-2.02-0.86.el7_4.x86_64.rpm grub2-efi-x64-2.02-0.86.el7_4.x86_64.rpm grub2-pc-2.02-0.86.el7_4.x86_64.rpm grub2-tools-2.02-0.86.el7_4.x86_64.rpm grub2-tools-extra-2.02-0.86.el7_4.x86_64.rpm grub2-tools-minimal-2.02-0.86.el7_4.x86_64.rpm mokutil-15-8.el7_4.x86_64.rpm mokutil-debuginfo-15-8.el7_4.x86_64.rpm shim-ia32-15-8.el7_4.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_4.x86_64.rpm Red Hat Enterprise Linux Server TUS (v. 7.4): Source: fwupdate-9-10.el7_4.src.rpm grub2-2.02-0.86.el7_4.src.rpm shim-15-8.el7.src.rpm shim-signed-15-8.el7_4.src.rpm noarch: grub2-common-2.02-0.86.el7_4.noarch.rpm grub2-efi-ia32-modules-2.02-0.86.el7_4.noarch.rpm grub2-efi-x64-modules-2.02-0.86.el7_4.noarch.rpm grub2-pc-modules-2.02-0.86.el7_4.noarch.rpm shim-unsigned-ia32-debuginfo-15-8.el7.noarch.rpm shim-unsigned-x64-debuginfo-15-8.el7.noarch.rpm x86_64: fwupdate-debuginfo-9-10.el7_4.x86_64.rpm fwupdate-efi-9-10.el7_4.x86_64.rpm fwupdate-libs-9-10.el7_4.x86_64.rpm grub2-2.02-0.86.el7_4.x86_64.rpm grub2-debuginfo-2.02-0.86.el7_4.x86_64.rpm grub2-efi-ia32-2.02-0.86.el7_4.x86_64.rpm grub2-efi-x64-2.02-0.86.el7_4.x86_64.rpm grub2-pc-2.02-0.86.el7_4.x86_64.rpm grub2-tools-2.02-0.86.el7_4.x86_64.rpm grub2-tools-extra-2.02-0.86.el7_4.x86_64.rpm grub2-tools-minimal-2.02-0.86.el7_4.x86_64.rpm mokutil-15-8.el7_4.x86_64.rpm mokutil-debuginfo-15-8.el7_4.x86_64.rpm shim-ia32-15-8.el7_4.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_4.x86_64.rpm Red Hat Enterprise Linux Server Optional AUS (v. 7.4): noarch: grub2-efi-aa64-modules-2.02-0.86.el7_4.noarch.rpm grub2-ppc-modules-2.02-0.86.el7_4.noarch.rpm grub2-ppc64-modules-2.02-0.86.el7_4.noarch.rpm grub2-ppc64le-modules-2.02-0.86.el7_4.noarch.rpm x86_64: fwupdate-9-10.el7_4.x86_64.rpm fwupdate-debuginfo-9-10.el7_4.x86_64.rpm fwupdate-devel-9-10.el7_4.x86_64.rpm grub2-debuginfo-2.02-0.86.el7_4.x86_64.rpm grub2-efi-ia32-cdboot-2.02-0.86.el7_4.x86_64.rpm grub2-efi-x64-cdboot-2.02-0.86.el7_4.x86_64.rpm Red Hat Enterprise Linux Server Optional E4S (v. 7.4): noarch: grub2-efi-aa64-modules-2.02-0.86.el7_4.noarch.rpm grub2-efi-ia32-modules-2.02-0.86.el7_4.noarch.rpm grub2-efi-x64-modules-2.02-0.86.el7_4.noarch.rpm grub2-pc-modules-2.02-0.86.el7_4.noarch.rpm grub2-ppc-modules-2.02-0.86.el7_4.noarch.rpm grub2-ppc64-modules-2.02-0.86.el7_4.noarch.rpm grub2-ppc64le-modules-2.02-0.86.el7_4.noarch.rpm x86_64: fwupdate-9-10.el7_4.x86_64.rpm fwupdate-debuginfo-9-10.el7_4.x86_64.rpm fwupdate-devel-9-10.el7_4.x86_64.rpm grub2-debuginfo-2.02-0.86.el7_4.x86_64.rpm grub2-efi-ia32-cdboot-2.02-0.86.el7_4.x86_64.rpm grub2-efi-x64-cdboot-2.02-0.86.el7_4.x86_64.rpm Red Hat Enterprise Linux Server Optional TUS (v. 7.4): noarch: grub2-efi-aa64-modules-2.02-0.86.el7_4.noarch.rpm grub2-ppc-modules-2.02-0.86.el7_4.noarch.rpm grub2-ppc64-modules-2.02-0.86.el7_4.noarch.rpm grub2-ppc64le-modules-2.02-0.86.el7_4.noarch.rpm x86_64: fwupdate-9-10.el7_4.x86_64.rpm fwupdate-debuginfo-9-10.el7_4.x86_64.rpm fwupdate-devel-9-10.el7_4.x86_64.rpm grub2-debuginfo-2.02-0.86.el7_4.x86_64.rpm grub2-efi-ia32-cdboot-2.02-0.86.el7_4.x86_64.rpm grub2-efi-x64-cdboot-2.02-0.86.el7_4.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 iQIVAwUBXyfyAtzjgjWX9erEAQiRow//Y7KwSaS4w6RBm70szfygE0Ytkk/NWUBr 9vw125do5gPURKFkLz+7h25KAwc6H5uVXaKC4upqPe7Ay5e4FBT5wqbXS+SQSdbC VPs5bHdvW3X5Cd3qp3RQWPGmTGhXmsYcFmiyWD/kfQ7+gbwrTF1+JP1ubxMTh4eh 3QPl4kPy8rZgsW6/EgFrPO9F5Sg+duV2ZQCplUryYMozBx4TVEeVO+UTUFyyE2aV S9bGCoMZeztpqlZmG4w2uLzRhHgDiSgF0Yd7pA4wSsxchY7PBR/FV8JkP8qAA2lk 4WT5ApleTlI8+4r/9vwpMmwtY/JTrA3pCz9ESMnwoIZOfgnXT/AwNVzBwTZvJlno Lo77XPcisdehGHQwk38YDTE93LggK1TBSlfVDtjTms+uAlGv76C9EF02FalEUE5h W1Sz3yIwybYQAswkXi+eMAd284E29bHyxz49MO1F2pKpVe81Ri9n3r2ZkZdsLjMt v5JYpJ0e2ioC4UdmEbVux01HcTn2pxXNCytLVUi/ZU7ilDzTXdxeQgyhiZlVLPQe u7icTfhPXvipFQjlSjhORkGh0tl2t96xfchxuP2holaElKnOFszSZp4FIuKH3tI2 stTlJc5wh30ddiq29xiTOWKD4IYROy6LtHYOcMEDBis2HIYenOK6OrDdhOsZQ985 iCQTHZLwufQ=zCiB -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce