2020-07-29 20:15:00 2020-08-08 20:15:00

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.

Vector

LOCAL

Complexity

MEDIUM

Authentication

NONE

Confidentiality

PARTIAL

Integrity

PARTIAL

Availability

PARTIAL
Microsoft Windows server 2019 - * * * (not an official CPE) Microsoft Windows server 2016 2004 * * * (not an official CPE) Microsoft Windows server 2016 1909 * * * (not an official CPE) Microsoft Windows server 2016 1903 * * * (not an official CPE) Microsoft Windows server 2016 - * * * (not an official CPE) Microsoft Windows server 2012 R2 * * * (not an official CPE) Microsoft Windows server 2012 - * * * (not an official CPE) Microsoft Windows rt 8.1 - * * * (not an official CPE) Microsoft Windows 8.1 - * * * (not an official CPE) Microsoft Windows 10 2004 * * * (not an official CPE) Microsoft Windows 10 1909 * * * (not an official CPE) Microsoft Windows 10 1903 * * * (not an official CPE) Microsoft Windows 10 1809 * * * (not an official CPE) Microsoft Windows 10 1803 * * * (not an official CPE) Microsoft Windows 10 1709 * * * (not an official CPE) Microsoft Windows 10 1607 * * * (not an official CPE) Microsoft Windows 10 - * * * (not an official CPE) Suse Suse linux enterprise server 15 * * * (not an official CPE) Suse Suse linux enterprise server 12 * * * (not an official CPE) Suse Suse linux enterprise server 11 * * * (not an official CPE) Redhat Enterprise linux 8.0 * * * (not an official CPE) Redhat Enterprise linux 7.0 * * * (not an official CPE) Debian Debian linux 10 * * * (not an official CPE) Canonical Ubuntu linux 20.04 * * * (not an official CPE) Canonical Ubuntu linux 18.04 * * * (not an official CPE) Canonical Ubuntu linux 16.04 * * * (not an official CPE) Canonical Ubuntu linux 14.04 * * * (not an official CPE)