Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. This issue affects GRUB2 version 2.04 and prior versions.
CVSS Details
- CVSS 3.1 Base Score: 5.7
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade grub | Aug 22, 2024 | Jul 29, 2020 |
| Centos_linux | — | Upgrade fwupdateUpgrade grub2-efi-x64-cdbootUpgrade fwupd-debuginfoUpgrade grub2-efi-ia32-modulesUpgrade grub2-tools-minimal-debuginfoUpgrade grub2-tools-efiUpgrade shim-ia32Upgrade grub2-tools-efi-debuginfoUpgrade grub2-ppc64le-modulesUpgrade grub2-ppc64-modulesUpgrade fwupdate-debuginfoUpgrade grub2Upgrade grub2-efi-ia32Upgrade grub2-efi-x64Upgrade grub2-pcUpgrade grub2-debugsourceUpgrade grub2-tools-minimalUpgrade shim-unsigned-x64Upgrade grub2-toolsUpgrade shim-unsigned-ia32Upgrade shim-x64Upgrade grub2-efi-aa64-modulesUpgrade grub2-debuginfoUpgrade grub2-tools-extraUpgrade grub2-efi-ia32-cdbootUpgrade mokutil-debuginfoUpgrade fwupd-debugsourceUpgrade grub2-tools-extra-debuginfoUpgrade grub2-tools-debuginfoUpgrade grub2-ppc-modulesUpgrade fwupdate-develUpgrade fwupdate-efiUpgrade grub2-commonUpgrade fwupdate-libsUpgrade mokutilUpgrade grub2-pc-modulesUpgrade grub2-efi-x64-modulesUpgrade fwupd | Jul 30, 2020 | Jul 29, 2020 |
| Debian | — | Upgrade grub2 | Jul 31, 2020 | Jul 29, 2020 |
| Gentoo Linux | — | Upgrade sys-devel/grub. | May 3, 2021 | Jul 29, 2020 |
| Huawei Euleros 2_0_sp8 | — | Upgrade grub2-commonUpgrade grub2-toolsUpgrade grub2-efi-aa64-cdbootUpgrade grub2-efi-aa64-modulesUpgrade grub2-tools-extraUpgrade grub2-tools-minimalUpgrade grub2-efi-aa64 | Aug 31, 2020 | Jul 29, 2020 |
| Oracle_linux | — | Upgrade grub2-tools-efiUpgrade grub2-efi-aa64Upgrade grub2-efi-ia32Upgrade grub2-tools-extraUpgrade grub2-efi-aa64-cdbootUpgrade grub2-tools-minimalUpgrade grub2-efi-x64-cdbootUpgrade grub2-efi-x64Upgrade grub2-pc-modulesUpgrade grub2-efi-aa64-modulesUpgrade grub2-toolsUpgrade grub2-efi-x64-modulesUpgrade grub2-pcUpgrade grub2-commonUpgrade grub2-efi-ia32-cdbootUpgrade grub2Upgrade grub2-efi-ia32-modules | Jul 30, 2020 | Jul 29, 2020 |
| Redhat_linux | — | Upgrade shim-ia32Upgrade fwupdateUpgrade grub2-efi-ia32-cdbootUpgrade grub2-tools-debuginfoUpgrade grub2Upgrade mokutilUpgrade grub2-toolsUpgrade grub2-tools-extraUpgrade shim-unsigned-x64-debuginfoUpgrade grub2-efi-x64-cdbootUpgrade grub2-tools-minimalUpgrade grub2-efi-x64-modulesUpgrade grub2-tools-efi-debuginfoUpgrade grub2-efi-ia32-modulesUpgrade grub2-ppc-modulesUpgrade grub2-efi-x64Upgrade grub2-ppc64-modulesUpgrade grub2-efi-ia32Upgrade grub2-tools-minimal-debuginfoUpgrade fwupdate-efiUpgrade grub2-tools-efiUpgrade grub2-debugsourceUpgrade shim-unsigned-ia32Upgrade grub2-pc-modulesUpgrade fwupd-debuginfoUpgrade grub2-debuginfoUpgrade shim-x64Upgrade fwupdUpgrade grub2-commonUpgrade fwupdate-debuginfoUpgrade fwupdate-develUpgrade shim-unsigned-aa64-debuginfoUpgrade mokutil-debuginfoUpgrade fwupdate-libsUpgrade grub2-ppc64le-modulesUpgrade shim-unsigned-ia32-debuginfoUpgrade fwupd-debugsourceUpgrade grub2-tools-extra-debuginfoUpgrade grub2-efi-aa64-modulesUpgrade shim-unsigned-x64Upgrade grub2-pc | Jul 30, 2020 | Jul 29, 2020 |
| Suse | — | Upgrade grub2-powerpc-ieee1275Upgrade grub2-i386-pcUpgrade grub2-arm64-efiUpgrade grub2-s390x-emuUpgrade grub2-i386-efiUpgrade grub2-systemd-sleep-pluginUpgrade grub2-x86_64-efiUpgrade grub2-i386-xenUpgrade grub2-branding-upstreamUpgrade grub2-x86_64-xenUpgrade grub2-snapper-pluginUpgrade grub2-i386-efi-debugUpgrade grub2-i386-pc-debugUpgrade grub2-x86_64-efi-debugUpgrade grub2 | Jul 30, 2020 | Jul 29, 2020 |
| Ubuntu | — | Upgrade grub-efi-ia32-binUpgrade grub-efi-arm64-binUpgrade grub-efi-amd64-binUpgrade grub-efi-arm64-signedUpgrade grub-efi-arm-binUpgrade grub-efi-amd64-signed | Aug 5, 2020 | Jul 29, 2020 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Jul 29, 2020 |
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