-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Moderate: grub2 security update Advisory ID: RHSA-2020:3223-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2020:3223 Issue date: 2020-07-29 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-unsigned-x64, and fwupd is now available for Red Hat Enterprise Linux 8.1 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 CodeReady Linux Builder EUS (v. 8.1) - x86_64 Red Hat Enterprise Linux BaseOS EUS (v. 8.1) - aarch64, noarch, ppc64le, s390x, 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 fwupd 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. 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 6. Package List: Red Hat Enterprise Linux BaseOS EUS (v. 8.1): Source: fwupd-1.1.4-2.el8_1.src.rpm grub2-2.02-87.el8_1.src.rpm shim-15-14.el8_1.src.rpm aarch64: fwupd-1.1.4-2.el8_1.aarch64.rpm fwupd-debuginfo-1.1.4-2.el8_1.aarch64.rpm fwupd-debugsource-1.1.4-2.el8_1.aarch64.rpm grub2-debuginfo-2.02-87.el8_1.aarch64.rpm grub2-debugsource-2.02-87.el8_1.aarch64.rpm grub2-efi-aa64-2.02-87.el8_1.aarch64.rpm grub2-efi-aa64-cdboot-2.02-87.el8_1.aarch64.rpm grub2-tools-2.02-87.el8_1.aarch64.rpm grub2-tools-debuginfo-2.02-87.el8_1.aarch64.rpm grub2-tools-extra-2.02-87.el8_1.aarch64.rpm grub2-tools-extra-debuginfo-2.02-87.el8_1.aarch64.rpm grub2-tools-minimal-2.02-87.el8_1.aarch64.rpm grub2-tools-minimal-debuginfo-2.02-87.el8_1.aarch64.rpm shim-aa64-15-14.el8_1.aarch64.rpm noarch: grub2-common-2.02-87.el8_1.noarch.rpm grub2-efi-aa64-modules-2.02-87.el8_1.noarch.rpm grub2-efi-ia32-modules-2.02-87.el8_1.noarch.rpm grub2-efi-x64-modules-2.02-87.el8_1.noarch.rpm grub2-pc-modules-2.02-87.el8_1.noarch.rpm grub2-ppc64le-modules-2.02-87.el8_1.noarch.rpm ppc64le: fwupd-1.1.4-2.el8_1.ppc64le.rpm fwupd-debuginfo-1.1.4-2.el8_1.ppc64le.rpm fwupd-debugsource-1.1.4-2.el8_1.ppc64le.rpm grub2-debuginfo-2.02-87.el8_1.ppc64le.rpm grub2-debugsource-2.02-87.el8_1.ppc64le.rpm grub2-ppc64le-2.02-87.el8_1.ppc64le.rpm grub2-tools-2.02-87.el8_1.ppc64le.rpm grub2-tools-debuginfo-2.02-87.el8_1.ppc64le.rpm grub2-tools-extra-2.02-87.el8_1.ppc64le.rpm grub2-tools-extra-debuginfo-2.02-87.el8_1.ppc64le.rpm grub2-tools-minimal-2.02-87.el8_1.ppc64le.rpm grub2-tools-minimal-debuginfo-2.02-87.el8_1.ppc64le.rpm s390x: fwupd-1.1.4-2.el8_1.s390x.rpm fwupd-debuginfo-1.1.4-2.el8_1.s390x.rpm fwupd-debugsource-1.1.4-2.el8_1.s390x.rpm x86_64: fwupd-1.1.4-2.el8_1.x86_64.rpm fwupd-debuginfo-1.1.4-2.el8_1.x86_64.rpm fwupd-debugsource-1.1.4-2.el8_1.x86_64.rpm grub2-debuginfo-2.02-87.el8_1.x86_64.rpm grub2-debugsource-2.02-87.el8_1.x86_64.rpm grub2-efi-ia32-2.02-87.el8_1.x86_64.rpm grub2-efi-ia32-cdboot-2.02-87.el8_1.x86_64.rpm grub2-efi-x64-2.02-87.el8_1.x86_64.rpm grub2-efi-x64-cdboot-2.02-87.el8_1.x86_64.rpm grub2-pc-2.02-87.el8_1.x86_64.rpm grub2-tools-2.02-87.el8_1.x86_64.rpm grub2-tools-debuginfo-2.02-87.el8_1.x86_64.rpm grub2-tools-efi-2.02-87.el8_1.x86_64.rpm grub2-tools-efi-debuginfo-2.02-87.el8_1.x86_64.rpm grub2-tools-extra-2.02-87.el8_1.x86_64.rpm grub2-tools-extra-debuginfo-2.02-87.el8_1.x86_64.rpm grub2-tools-minimal-2.02-87.el8_1.x86_64.rpm grub2-tools-minimal-debuginfo-2.02-87.el8_1.x86_64.rpm shim-ia32-15-14.el8_1.x86_64.rpm shim-x64-15-14.el8_1.x86_64.rpm Red Hat CodeReady Linux Builder EUS (v. 8.1): Source: shim-unsigned-x64-15-7.el8.src.rpm x86_64: shim-unsigned-x64-15-7.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-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 iQIVAwUBXyHQgNzjgjWX9erEAQhnvhAAgryO0E3ox1uIRkWKWXF1NoRq9X+r4dpJ Oc0Wn2t/hgG3S/lzqQJWDGkRVSrIycSd2NhAuC2nsCzIZNsngSkNP6jFrnl6MHYy Q4ZS/RF1hFZxaHMGb1DDOsKGxjlKdqgk2V7TN5nfJBLjEOB+REiO8ih2bzwjLNUi maiWwra1beKdEmSBPPbJ+M1yzRgZIbY7d9zNY7G7xzrovDq/S99iSB1D58tNbh/u Us91GL1MTUTd3YSBt1qjIF8p+4f2JXuu0NeNTTkBAsyjHDqATniSFH+ZoDRp6lxW PDMGABFh6479y50mLS69ac647xFKCAbzDutc04rBL/BzivxzOp4prO39ebZVe4XP S4O/EU5Iu62YtIx6iwiQ8razXqW/Zb+y2xCi8VaxJqJwogk0HqVxfXewUbPmmvjR 9fLEEBz1bir+rDYU59KAhT0+w5iAYQZmKbpD/zjyGqedSDoCgWlORF8JND+4B6IB xwmiDZWrfH3lsg4rzIIFr4rd6vzI9d4Rc5LFVyqSIZ/REWhJDxKWs/8H5PvNzDk0 3UqmAdfosJFQvWFhrFxfZy/ITBz6p9ScSe8s2aFudOUwGYbR8eY3mTqAqCJJq+wT LG9XZAfSAB6Xwolvwa5jKVna34EqzDMexJp76ZZ3I9agH7IXeYA/xnMTKt/tt18Z kEuD5ben5IU=j/2T -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce