8.2 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
4.6 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
0.002 Low
EPSS
Percentile
60.2%
The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices.
The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments.
The fwupdate packages provide a service that allows session software to update device firmware.
Security Fix(es):
grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process (CVE-2020-10713)
grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent heap-based buffer overflow (CVE-2020-14308)
grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow (CVE-2020-14309)
grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow (CVE-2020-14310)
grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow (CVE-2020-14311)
grub2: Fail kernel validation without shim protocol (CVE-2020-15705)
grub2: Use-after-free redefining a function whilst the same function is already executing (CVE-2020-15706)
grub2: Integer overflow in initrd size handling (CVE-2020-15707)
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.
Bug Fix(es):
grub2 doesn’t handle relative paths correctly for UEFI HTTP Boot (BZ#1616395)
UEFI HTTP boot over IPv6 does not work (BZ#1732765)
Users of grub2 are advised to upgrade to these updated packages, which fix these bugs.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
RedHat | 7 | x86_64 | grub2-tools-extra | < 2.02-0.86.el7_8 | grub2-tools-extra-2.02-0.86.el7_8.x86_64.rpm |
RedHat | 7 | x86_64 | shim-unsigned-ia32 | < 15-7.el7_9 | shim-unsigned-ia32-15-7.el7_9.x86_64.rpm |
RedHat | 7 | ppc64le | grub2-tools | < 2.02-0.86.el7_8 | grub2-tools-2.02-0.86.el7_8.ppc64le.rpm |
RedHat | 7 | x86_64 | grub2-tools-minimal | < 2.02-0.86.el7_8 | grub2-tools-minimal-2.02-0.86.el7_8.x86_64.rpm |
RedHat | 7 | ppc64le | grub2-tools-minimal | < 2.02-0.86.el7_8 | grub2-tools-minimal-2.02-0.86.el7_8.ppc64le.rpm |
RedHat | 7 | x86_64 | mokutil-debuginfo | < 15-7.el7_8 | mokutil-debuginfo-15-7.el7_8.x86_64.rpm |
RedHat | 7 | x86_64 | fwupdate-efi | < 12-6.el7_8 | fwupdate-efi-12-6.el7_8.x86_64.rpm |
RedHat | 7 | x86_64 | grub2-efi-ia32-cdboot | < 2.02-0.86.el7_8 | grub2-efi-ia32-cdboot-2.02-0.86.el7_8.x86_64.rpm |
RedHat | 7 | x86_64 | grub2-tools | < 2.02-0.86.el7_8 | grub2-tools-2.02-0.86.el7_8.x86_64.rpm |
RedHat | 7 | x86_64 | shim-unsigned-x64 | < 15-7.el7_9 | shim-unsigned-x64-15-7.el7_9.x86_64.rpm |
8.2 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
4.6 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
0.002 Low
EPSS
Percentile
60.2%