A flaw was found in grub2 in versions prior to 2.06. The cutmem command does not honor secure boot locking allowing an privileged attacker to remove address ranges from memory creating an opportunity to circumvent SecureBoot protections after proper triage about grubs memory layout. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
Name | Vendor | Start Version | End Version |
---|---|---|---|
Grub2 | Gnu | * | 2.06 (excluding) |
Red Hat Enterprise Linux 7 | RedHat | grub2-1:2.02-0.87.el7_9.2 | * |
Red Hat Enterprise Linux 7.2 Advanced Update Support | RedHat | grub2-1:2.02-0.86.el7_2.2 | * |
Red Hat Enterprise Linux 7.3 Advanced Update Support | RedHat | grub2-1:2.02-0.86.el7_3.2 | * |
Red Hat Enterprise Linux 7.4 Advanced Update Support | RedHat | grub2-1:2.02-0.86.el7_4.2 | * |
Red Hat Enterprise Linux 7.4 Telco Extended Update Support | RedHat | grub2-1:2.02-0.86.el7_4.2 | * |
Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions | RedHat | grub2-1:2.02-0.86.el7_4.2 | * |
Red Hat Enterprise Linux 7.6 Extended Update Support | RedHat | grub2-1:2.02-0.86.el7_6.3 | * |
Red Hat Enterprise Linux 7.7 Extended Update Support | RedHat | grub2-1:2.02-0.86.el7_7.3 | * |
Red Hat Enterprise Linux 8 | RedHat | grub2-1:2.02-90.el8_3.1 | * |
Red Hat Enterprise Linux 8 | RedHat | shim-0:15.4-2.el8_1 | * |
Red Hat Enterprise Linux 8 | RedHat | shim-unsigned-aarch64-0:15-7.el8_1 | * |
Red Hat Enterprise Linux 8 | RedHat | shim-unsigned-x64-0:15.4-4.el8_1 | * |
Red Hat Enterprise Linux 8 | RedHat | fwupd-0:1.5.9-1.el8_4 | * |
Red Hat Enterprise Linux 8.1 Extended Update Support | RedHat | grub2-1:2.02-87.el8_1.2 | * |
Red Hat Enterprise Linux 8.1 Extended Update Support | RedHat | fwupd-0:1.1.4-4.el8_1 | * |
Red Hat Enterprise Linux 8.1 Extended Update Support | RedHat | shim-0:15.4-2.el8_1 | * |
Red Hat Enterprise Linux 8.1 Extended Update Support | RedHat | shim-unsigned-aarch64-0:15-7.el8_1 | * |
Red Hat Enterprise Linux 8.1 Extended Update Support | RedHat | shim-unsigned-x64-0:15.4-4.el8_1 | * |
Red Hat Enterprise Linux 8.2 Extended Update Support | RedHat | grub2-1:2.02-87.el8_2.3 | * |
Red Hat Enterprise Linux 8.2 Extended Update Support | RedHat | fwupd-0:1.1.4-9.el8_2 | * |
Red Hat Enterprise Linux 8.2 Extended Update Support | RedHat | shim-0:15.4-2.el8_1 | * |
Red Hat Enterprise Linux 8.2 Extended Update Support | RedHat | shim-unsigned-aarch64-0:15-7.el8_1 | * |
Red Hat Enterprise Linux 8.2 Extended Update Support | RedHat | shim-unsigned-x64-0:15.4-4.el8_1 | * |
Grub2 | Ubuntu | bionic | * |
Grub2 | Ubuntu | trusty | * |
Grub2 | Ubuntu | xenial | * |
Grub2-signed | Ubuntu | bionic | * |
Grub2-signed | Ubuntu | esm-infra-legacy/trusty | * |
Grub2-signed | Ubuntu | focal | * |
Grub2-signed | Ubuntu | groovy | * |
Grub2-signed | Ubuntu | hirsute | * |
Grub2-signed | Ubuntu | impish | * |
Grub2-signed | Ubuntu | trusty | * |
Grub2-signed | Ubuntu | trusty/esm | * |
Grub2-signed | Ubuntu | xenial | * |
Grub2-unsigned | Ubuntu | bionic | * |
Grub2-unsigned | Ubuntu | focal | * |
Grub2-unsigned | Ubuntu | groovy | * |
Grub2-unsigned | Ubuntu | hirsute | * |
Grub2-unsigned | Ubuntu | impish | * |
Grub2-unsigned | Ubuntu | precise/esm | * |
Grub2-unsigned | Ubuntu | trusty | * |
Grub2-unsigned | Ubuntu | xenial | * |
Assuming a user with a given identity, authorization is the process of determining whether that user can access a given resource, based on the user’s privileges and any permissions or other access-control specifications that apply to the resource. When access control checks are not applied consistently - or not at all - users are able to access data or perform actions that they should not be allowed to perform. This can lead to a wide range of problems, including information exposures, denial of service, and arbitrary code execution.