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 grub2-efi-x64-cdbootUpgrade grub2-toolsUpgrade grub2-debugsourceUpgrade grub2-ppc64le-modulesUpgrade grub2-tools-efi-debuginfoUpgrade grub2-efi-x64Upgrade grub2-ppc64-modulesUpgrade grub2Upgrade fwupdate-debuginfoUpgrade grub2-efi-ia32Upgrade grub2-efi-ia32-modulesUpgrade fwupd-debuginfoUpgrade fwupdateUpgrade grub2-pcUpgrade grub2-tools-minimalUpgrade shim-ia32Upgrade shim-unsigned-x64Upgrade grub2-tools-efiUpgrade grub2-tools-minimal-debuginfoUpgrade mokutil-debuginfoUpgrade grub2-efi-ia32-cdbootUpgrade shim-unsigned-ia32Upgrade grub2-tools-extraUpgrade fwupd-debugsourceUpgrade grub2-efi-x64-modulesUpgrade fwupdUpgrade mokutilUpgrade shim-x64Upgrade grub2-efi-aa64-modulesUpgrade grub2-commonUpgrade grub2-tools-extra-debuginfoUpgrade grub2-tools-debuginfoUpgrade grub2-ppc-modulesUpgrade fwupdate-develUpgrade fwupdate-libsUpgrade fwupdate-efiUpgrade grub2-pc-modulesUpgrade grub2-debuginfo | 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-efi-aa64-modulesUpgrade grub2-tools-minimalUpgrade grub2-tools-extraUpgrade grub2-efi-aa64Upgrade grub2-efi-aa64-cdbootUpgrade grub2-toolsUpgrade grub2-common | Aug 31, 2020 | Jul 29, 2020 |
| Oracle_linux | — | Upgrade grub2-tools-efiUpgrade grub2-efi-aa64-cdbootUpgrade grub2-efi-x64-cdbootUpgrade grub2-efi-x64Upgrade grub2-tools-extraUpgrade grub2-efi-aa64Upgrade grub2-tools-minimalUpgrade grub2-pc-modulesUpgrade grub2-efi-ia32Upgrade grub2-toolsUpgrade grub2-efi-x64-modulesUpgrade grub2-efi-aa64-modulesUpgrade grub2-efi-ia32-cdbootUpgrade grub2-pcUpgrade grub2-efi-ia32-modulesUpgrade grub2-commonUpgrade grub2 | Jul 30, 2020 | Jul 29, 2020 |
| Redhat_linux | — | Upgrade fwupdate-debuginfoUpgrade shim-x64Upgrade fwupdate-develUpgrade grub2-efi-aa64-modulesUpgrade shim-unsigned-ia32-debuginfoUpgrade shim-unsigned-x64Upgrade grub2-debuginfoUpgrade shim-unsigned-aa64-debuginfoUpgrade fwupd-debugsourceUpgrade fwupdate-libsUpgrade grub2-pc-modulesUpgrade mokutil-debuginfoUpgrade fwupdUpgrade shim-unsigned-ia32Upgrade grub2-pcUpgrade fwupd-debuginfoUpgrade grub2-tools-extra-debuginfoUpgrade grub2-ppc64le-modulesUpgrade grub2-commonUpgrade grub2-toolsUpgrade grub2-ppc-modulesUpgrade fwupdate-efiUpgrade grub2Upgrade grub2-efi-x64-modulesUpgrade mokutilUpgrade grub2-tools-extraUpgrade grub2-tools-efi-debuginfoUpgrade grub2-tools-debuginfoUpgrade grub2-efi-ia32-cdbootUpgrade grub2-efi-ia32-modulesUpgrade grub2-efi-x64-cdbootUpgrade grub2-tools-efiUpgrade grub2-debugsourceUpgrade grub2-tools-minimal-debuginfoUpgrade grub2-efi-ia32Upgrade grub2-ppc64-modulesUpgrade grub2-efi-x64Upgrade shim-unsigned-x64-debuginfoUpgrade shim-ia32Upgrade fwupdateUpgrade grub2-tools-minimal | Jul 30, 2020 | Jul 29, 2020 |
| Suse | — | Upgrade grub2-snapper-pluginUpgrade grub2Upgrade grub2-x86_64-xenUpgrade grub2-i386-efi-debugUpgrade grub2-i386-pc-debugUpgrade grub2-i386-xenUpgrade grub2-x86_64-efi-debugUpgrade grub2-branding-upstreamUpgrade grub2-powerpc-ieee1275Upgrade grub2-arm64-efiUpgrade grub2-x86_64-efiUpgrade grub2-s390x-emuUpgrade grub2-i386-efiUpgrade grub2-i386-pcUpgrade grub2-systemd-sleep-plugin | Jul 30, 2020 | Jul 29, 2020 |
| Ubuntu | — | Upgrade grub-efi-arm-binUpgrade grub-efi-arm64-binUpgrade grub-efi-amd64-binUpgrade grub-efi-arm64-signedUpgrade grub-efi-ia32-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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