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
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
Debian Security Advisory DSA-4867-1 [email protected]
https://www.debian.org/security/ Salvatore Bonaccorso
March 02, 2021 https://www.debian.org/security/faq
Package : grub2
CVE ID : CVE-2020-14372 CVE-2020-25632 CVE-2020-25647 CVE-2020-27749
CVE-2020-27779 CVE-2021-20225 CVE-2021-20233
Several vulnerabilities have been discovered in the GRUB2 bootloader.
CVE-2020-14372
It was discovered that the acpi command allows a privileged user to
load crafted ACPI tables when Secure Boot is enabled.
CVE-2020-25632
A use-after-free vulnerability was found in the rmmod command.
CVE-2020-25647
An out-of-bound write vulnerability was found in the
grub_usb_device_initialize() function, which is called to handle USB
device initialization.
CVE-2020-27749
A stack buffer overflow flaw was found in grub_parser_split_cmdline.
CVE-2020-27779
It was discovered that the cutmem command allows a privileged user
to remove memory regions when Secure Boot is enabled.
CVE-2021-20225
A heap out-of-bounds write vulnerability was found in the short form
option parser.
CVE-2021-20233
A heap out-of-bound write flaw was found caused by mis-calculation
of space required for quoting in the menu rendering.
Further detailed information can be found at
https://www.debian.org/security/2021-GRUB-UEFI-SecureBoot
For the stable distribution (buster), these problems have been fixed in
version 2.02+dfsg1-20+deb10u4.
We recommend that you upgrade your grub2 packages.
For the detailed security status of grub2 please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/grub2
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: [email protected]
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 10 | amd64 | grub-xen-host | < 2.02+dfsg1-20+deb10u4 | grub-xen-host_2.02+dfsg1-20+deb10u4_amd64.deb |
Debian | 10 | amd64 | grub-coreboot-bin | < 2.02+dfsg1-20+deb10u4 | grub-coreboot-bin_2.02+dfsg1-20+deb10u4_amd64.deb |
Debian | 10 | arm64 | grub-mount-udeb | < 2.02+dfsg1-20+deb10u4 | grub-mount-udeb_2.02+dfsg1-20+deb10u4_arm64.deb |
Debian | 10 | i386 | grub-pc-bin | < 2.02+dfsg1-20+deb10u4 | grub-pc-bin_2.02+dfsg1-20+deb10u4_i386.deb |
Debian | 10 | armhf | grub-common | < 2.02+dfsg1-20+deb10u4 | grub-common_2.02+dfsg1-20+deb10u4_armhf.deb |
Debian | 10 | i386 | grub2-common-dbgsym | < 2.02+dfsg1-20+deb10u4 | grub2-common-dbgsym_2.02+dfsg1-20+deb10u4_i386.deb |
Debian | 10 | armel | grub-common | < 2.02+dfsg1-20+deb10u4 | grub-common_2.02+dfsg1-20+deb10u4_armel.deb |
Debian | 10 | amd64 | grub-xen-dbg | < 2.02+dfsg1-20+deb10u4 | grub-xen-dbg_2.02+dfsg1-20+deb10u4_amd64.deb |
Debian | 10 | armhf | grub-mount-udeb | < 2.02+dfsg1-20+deb10u4 | grub-mount-udeb_2.02+dfsg1-20+deb10u4_armhf.deb |
Debian | 10 | mipsel | grub-mount-udeb | < 2.02+dfsg1-20+deb10u4 | grub-mount-udeb_2.02+dfsg1-20+deb10u4_mipsel.deb |
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
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C