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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.2468 shim and fwupd security update 21 July 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-2021.2263 ESB-2021.2178 ESB-2021.1739 ESB-2021.0753 ESB-2021.0748 Original Bulletin: https://access.redhat.com/errata/RHSA-2021:2790 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: shim and fwupd security update Advisory ID: RHSA-2021:2790-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:2790 Issue date: 2021-07-20 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 8.2 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. 8.2) - aarch64, x86_64 Red Hat Enterprise Linux BaseOS EUS (v. 8.2) - 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#1932411) 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. 8.2): Source: fwupd-1.1.4-9.el8_2.src.rpm shim-15.4-2.el8_1.src.rpm aarch64: fwupd-1.1.4-9.el8_2.aarch64.rpm fwupd-debuginfo-1.1.4-9.el8_2.aarch64.rpm fwupd-debugsource-1.1.4-9.el8_2.aarch64.rpm shim-aa64-15.4-2.el8_1.aarch64.rpm ppc64le: fwupd-1.1.4-9.el8_2.ppc64le.rpm fwupd-debuginfo-1.1.4-9.el8_2.ppc64le.rpm fwupd-debugsource-1.1.4-9.el8_2.ppc64le.rpm s390x: fwupd-1.1.4-9.el8_2.s390x.rpm fwupd-debuginfo-1.1.4-9.el8_2.s390x.rpm fwupd-debugsource-1.1.4-9.el8_2.s390x.rpm x86_64: fwupd-1.1.4-9.el8_2.x86_64.rpm fwupd-debuginfo-1.1.4-9.el8_2.x86_64.rpm fwupd-debugsource-1.1.4-9.el8_2.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. 8.2): 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 iQIVAwUBYPdKe9zjgjWX9erEAQia/Q/+OF5AfNo/I3l3OsE9kBgmxqXoTANkbpkv rLUizj+khr3q8QQKOvkeS7QrsnRpaUthnHhwu95oYZoJl0lbEVh6k3atkIxI9qsR Ppt5cL7O3BpG9VvnHfUbti9kDl/3WCoywKio5m+aq670FVK4RI4DqYthnVSKlJPP yeyDiBYz+HsqG/hvRrxCv70fVHA+BCGeCM1qaJozqhl18kaSY1KU0K/QJQ7cEMBY G8Px2EVYJE5vc+PQWldkvfskHfJKuC4xEf0A7xNB6eBi/HMMXuvnnvxg02Tvq22m 2SrboHq7OHzvP/wORoU2y7ZvHf/JkXj0vB827h1X/09rjQMc5HcJVT6/14ja+hBd HZQpiVe/+hqWufinfGCBC4Y//dGDDJ/fqMXWvSavJm6PPVqRuXfk5TaaJSx/nShb tJ1i9pjbAqCJbY5RMgNLoul13AINEPOcd+A/fCebpMiDMHts1hbVtiifENbweZTX 1vnP+bpgrKxrU6u/RYg88AeNp+Lga++jnykxK6kb5AP2hUjoy4kMaj380DOQZRvD lOppjgnBGSolfZLt3vdprJgeMGbsh1FiFDt3ls7asO800yZrsCJpAw7byznTPasP U+li7OLKM6F4oP+8G2j3EDE1+BteA9OAUGI0phvLXu0C+zpg7R3cJfCVeTLjC3Qd NSoKps/AMhI= =jbDg - -----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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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBYPfAxeNLKJtyKPYoAQihSw//dChjJzdFKjndNu+QtYv1FXESK5ihYh9C ugIZwIT/T33o9lZnTMMDPvW/c0DtR42/sc7qBtIN6lifgWJYtf/PxC/JkMBAp4di X6CAy2yrEE7zQ1GqJlOh2L84W62XmWTohScrCPIe+PpqaWeWRYMjN/gWMS5cUm+W cesl9oT/EsTDHEGmDo9jONnJUfOKEnHP53adoOHATlxRlxpfDh3x9IAq2xIBi7rZ qy48PYiaLeXzsqe0JQnTvD67jLwcf9RjwQCGmGXBl7YRj4PlIQqOU7Rk0Fja3Kf1 VmjqXP5ZMRdEWR1ErEy9Fj3WisaVICbLrXr89k4Ta/pz7sv1+WWP16ZfHNOmdtpk vjhSxo+f6LfRixQ5wYzFYhLyuFGY1ctaC83O89wP0pwY8L3PjE1KcU1fTWLP6TB0 n5hJlJyF+mYh71KsTSgfra65gXjPNse7WwOXDPQ8QFoi/dh4/mU4TtlK6Gh/uzsy sqH/r7sb1wIpfcYmSB1QuF5Qu4/XhSVLUrAs1E9jNRSGQlBpQ8uek8WV2SY9Bjww 5XgZPglJi8i833pLt92jMvNaGdABOsxmEMct37eFqen0uoi6qRy++lmJOpEngWxL m5kS3sPoo90zTROK7dpI85MpVGBjKtIaoO5HNVOw4t4S3q3SacEQgiJjJjneDtbi GkFQk+a3BVo= =k4tT -----END PGP SIGNATURE-----