CVSS2
Attack Vector
LOCAL
Attack 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
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
EPSS
Percentile
62.3%
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.
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):
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
RedHat | 7 | x86_64 | grub2-tools-extra | < 2.02-0.86.el7 | grub2-tools-extra-2.02-0.86.el7.x86_64.rpm |
RedHat | 7 | ppc64le | grub2-debuginfo | < 2.02-0.86.el7 | grub2-debuginfo-2.02-0.86.el7.ppc64le.rpm |
RedHat | 7 | noarch | grub2-ppc-modules | < 2.02-0.86.el7 | grub2-ppc-modules-2.02-0.86.el7.noarch.rpm |
RedHat | 7 | x86_64 | shim-unsigned-ia32 | < 15-8.el7 | shim-unsigned-ia32-15-8.el7.x86_64.rpm |
RedHat | 7 | noarch | grub2-ppc64-modules | < 2.02-0.86.el7 | grub2-ppc64-modules-2.02-0.86.el7.noarch.rpm |
RedHat | 7 | ppc64le | grub2 | < 2.02-0.86.el7 | grub2-2.02-0.86.el7.ppc64le.rpm |
RedHat | 7 | ppc64le | grub2-tools-extra | < 2.02-0.86.el7 | grub2-tools-extra-2.02-0.86.el7.ppc64le.rpm |
RedHat | 7 | noarch | grub2-pc-modules | < 2.02-0.86.el7 | grub2-pc-modules-2.02-0.86.el7.noarch.rpm |
RedHat | 7 | x86_64 | grub2 | < 2.02-0.86.el7 | grub2-2.02-0.86.el7.x86_64.rpm |
RedHat | 7 | x86_64 | grub2-efi-x64-cdboot | < 2.02-0.86.el7 | grub2-efi-x64-cdboot-2.02-0.86.el7.x86_64.rpm |
CVSS2
Attack Vector
LOCAL
Attack 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
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
EPSS
Percentile
62.3%