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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.3242 shim and fwupd security update 29 September 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: shim and fwupd Publisher: Red Hat Operating System: Red Hat Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Denial of Service -- Existing Account Access Confidential Data -- Existing Account Unauthorised Access -- Existing Account Reduced Security -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-20233 CVE-2021-20225 CVE-2020-27779 CVE-2020-27749 CVE-2020-25647 CVE-2020-25632 CVE-2020-14372 Reference: ESB-2021.2468 ESB-2021.2263 Original Bulletin: https://access.redhat.com/errata/RHSA-2021:3675 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: shim and fwupd security update Advisory ID: RHSA-2021:3675-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:3675 Issue date: 2021-09-28 CVE Names: CVE-2020-14372 CVE-2020-25632 CVE-2020-25647 CVE-2020-27749 CVE-2020-27779 CVE-2021-20225 CVE-2021-20233 ===================================================================== 1. Summary: An update for fwupd, shim, shim-unsigned-aarch64, and shim-unsigned-x64 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) - aarch64, x86_64 Red Hat Enterprise Linux BaseOS EUS (v. 8.1) - aarch64, ppc64le, s390x, x86_64 3. Description: 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. The following packages have been upgraded to a later upstream version: shim (15.4). (BZ#1932410) Security Fix(es): * grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled (CVE-2020-14372) * grub2: Use-after-free in rmmod command (CVE-2020-25632) * grub2: Out-of-bounds write in grub_usb_device_initialize() (CVE-2020-25647) * grub2: Stack buffer overflow in grub_parser_split_cmdline() (CVE-2020-27749) * grub2: cutmem command allows privileged user to remove memory regions when Secure Boot is enabled (CVE-2020-27779) * grub2: Heap out-of-bounds write in short form option parser (CVE-2021-20225) * grub2: Heap out-of-bounds write due to miscalculation of space required for quoting (CVE-2021-20233) 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/): 1873150 - CVE-2020-14372 grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled 1879577 - CVE-2020-25632 grub2: Use-after-free in rmmod command 1886936 - CVE-2020-25647 grub2: Out-of-bounds write in grub_usb_device_initialize() 1899966 - CVE-2020-27749 grub2: Stack buffer overflow in grub_parser_split_cmdline() 1900698 - CVE-2020-27779 grub2: cutmem command allows privileged user to remove memory regions when Secure Boot is enabled 1924696 - CVE-2021-20225 grub2: Heap out-of-bounds write in short form option parser 1926263 - CVE-2021-20233 grub2: Heap out-of-bounds write due to miscalculation of space required for quoting 6. Package List: Red Hat Enterprise Linux BaseOS EUS (v. 8.1): Source: fwupd-1.1.4-4.el8_1.src.rpm shim-15.4-2.el8_1.src.rpm aarch64: fwupd-1.1.4-4.el8_1.aarch64.rpm fwupd-debuginfo-1.1.4-4.el8_1.aarch64.rpm fwupd-debugsource-1.1.4-4.el8_1.aarch64.rpm shim-aa64-15.4-2.el8_1.aarch64.rpm ppc64le: fwupd-1.1.4-4.el8_1.ppc64le.rpm fwupd-debuginfo-1.1.4-4.el8_1.ppc64le.rpm fwupd-debugsource-1.1.4-4.el8_1.ppc64le.rpm s390x: fwupd-1.1.4-4.el8_1.s390x.rpm fwupd-debuginfo-1.1.4-4.el8_1.s390x.rpm fwupd-debugsource-1.1.4-4.el8_1.s390x.rpm x86_64: fwupd-1.1.4-4.el8_1.x86_64.rpm fwupd-debuginfo-1.1.4-4.el8_1.x86_64.rpm fwupd-debugsource-1.1.4-4.el8_1.x86_64.rpm shim-ia32-15.4-2.el8_1.x86_64.rpm shim-x64-15.4-2.el8_1.x86_64.rpm Red Hat CodeReady Linux Builder EUS (v. 8.1): Source: shim-unsigned-aarch64-15-7.el8_1.src.rpm shim-unsigned-x64-15.4-4.el8_1.src.rpm aarch64: shim-unsigned-aarch64-15-7.el8_1.aarch64.rpm x86_64: shim-unsigned-x64-15.4-4.el8_1.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-2020-14372 https://access.redhat.com/security/cve/CVE-2020-25632 https://access.redhat.com/security/cve/CVE-2020-25647 https://access.redhat.com/security/cve/CVE-2020-27749 https://access.redhat.com/security/cve/CVE-2020-27779 https://access.redhat.com/security/cve/CVE-2021-20225 https://access.redhat.com/security/cve/CVE-2021-20233 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/security/vulnerabilities/RHSB-2021-003 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2021 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYVMoXNzjgjWX9erEAQhsGQ/+IXv7ouaquc1VJd6BSCD53UUNjV/pzck7 7wqvfvz4gIpMbgPH/yBMsiJeBRzl+5VlaERYp0S8o35npwokQO7TQP8+CVEi/yCy yq32XWSPquUYo7HPRJaxU9lIQmH7aq6uM/FM4/NA+Bgxo55Pidr6JNwo1hQXUCxp V4GptlYCbaSpBG3yADRxY4ALaxtSnSGH/V9iZvzOS/4d6ma8y+lbOAZHylOE99LK WLJRq/L+BmmTLLvHMwZkjmkQkNX44bADHwP4Tc2eeeaW3IUglUfl64k0Hb69tt7q Ny3xevJobRQGxfc5U59+qgAMlFTR6nldnivFxusWzzLxVQKjFDxUoxj5R0m+LQrI 4jQph1UAHgKyya791R7aNMQtsYs1Dqwio1prbktqy+QPganCagnddWMbytN3lM7o q2+2Q1NT7yB01CnMeBM94Xn3TS4TAUmfhZLJfDvMesjjFX+RrBs1L4JkHl7iXsTq TDH8QNA+q94Xk+8CjHALszzLh3+LdkvoHVN0BWZTT8ElQ8ZNy0dQd+gEZh4F3DSa 4DzCklBeQNmJMuLkbbsaTYphMR5l8m5S0bIOqXMUMaiIpmXflS14x+xnyhyCzyXl YV+V/dUbTbS8ou5/xEZaJ/mArPMrYF8Nb8vJ7tsh0XtH3XTdZPFf6hCSd86V51Fp Pkc98lCNM88= =+0q2 - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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