grub2: bypass the GRUB password protection feature

An authentication bypass flaw was found in GRUB due to the way that GRUB uses the UUID of a device to search for the configuration file that contains the password hash for the GRUB password protection feature. An attacker capable of attaching an external drive such as a USB stick containing a fil...

DEBIAN-CVE-2024-23301

Relax-and-Recover aka ReaR through 2.7 creates a world-readable initrd when using GRUBRESCUE=y. This allows local attackers to gain access to system secrets otherwise only readable by root...

PT-2023-5885 · Grub2 +10 · Grub2 +10

Name of the Vulnerable Software and Affected Versions: Grub2 affected versions not specified Description: The issue is related to an out-of-bounds read flaw in Grub2's NTFS filesystem driver. This flaw may allow a physically present attacker to present a specially crafted NTFS file system image t...

The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.

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DEBIAN-CVE-2022-28734

Out-of-bounds write when handling split HTTP headers; When handling split HTTP headers, GRUB2 HTTP code accidentally moves its internal data buffer point by one position. This can lead to a out-of-bound write further when parsing the HTTP request, writing a NULL byte past the buffer. It's...

UBUNTU-CVE-2022-28735

The GRUB2's shimlock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain...

PT-2023-2264 · Cisco · Cisco Ios Xr

Name of the Vulnerable Software and Affected Versions: Cisco IOS XR Software affected versions not specified Description: A vulnerability in the GRand Unified Bootloader GRUB for Cisco IOS XR Software could allow an unauthenticated attacker with physical access to the device to view sensitive fil...

SUSE CVE-2019-14865

A flaw was found in the grub2-set-bootflag utility of grub2. A local attacker could run this utility under resource pressure for example by setting RLIMIT, causing grub2 configuration files to be truncated and leaving the system unbootable on subsequent reboots...

SUSE CVE-2020-15707

Integer overflows were discovered in the functions grubcmdinitrd and grubinitrdinit 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...

CLSA-2023-1674815966 grub2: Fix of 2 CVEs

font: Reject glyphs exceeds font-maxglyphwidth or font-maxglyph height - font: Fix size overflow in grubfontgetglyphinternal - CVE-2022-2601: font: Fix several integer overflows in grubfontconstructglyph - CVE-2022-3775: font: Fix an integer underflow in blitcomb...

grub2: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass

A flaw was found where a maliciously crafted pf2 font could lead to an out-of-bounds write in grub2. A successful attack can lead to memory corruption and secure boot circumvention...

AZL-34792 CVE-2022-3775 affecting package grub2 for versions less than 2.06-14

When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption an...

grub2: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass

A flaw was found where a maliciously crafted pf2 font could lead to an out-of-bounds write in grub2. A successful attack can lead to memory corruption and secure boot circumvention...

The vulnerability of the Grub configuration file allows a perpetrator to gain access to confidential data, compromise its integrity, and cause service failures.

The vulnerability of the Grub configuration file is related to writing beyond the buffer boundaries. Exploiting this vulnerability allows an attacker to access confidential data, compromise its integrity, and cause service failures...

[SECURITY] Fedora 37 Update: grub2-2.06-63.fc37

The GRand Unified Bootloader GRUB is a highly configurable and customizable bootloader with modular architecture. It supports a rich variety of kernel formats, file systems, computer architectures and hardware devices...

The vulnerability of the grub_font_construct_glyph() function, a loader for the Grub2 operating system, allows a hacker to execute arbitrary code.

The vulnerability of the grubfontconstructglyph function, a part of the Grub2 operating system loader, is related to the issue where an operation goes beyond the buffer boundaries in memory when processing specially formatted glyphs in the pf2 format. Exploiting this vulnerability allows an...

Default credentials

Fedora CoreOS supports setting a GRUB bootloader password using a Butane config. When this feature is enabled, GRUB requires a password to access the GRUB command-line, modify kernel command-line arguments, or boot non-default OSTree deployments. Recent Fedora CoreOS releases have a...

CVE-2022-3675

Fedora CoreOS supports setting a GRUB bootloader password using a Butane config. When this feature is enabled, GRUB requires a password to access the GRUB command-line, modify kernel command-line arguments, or boot non-default OSTree deployments. Recent Fedora CoreOS releases have a...

CVE-2022-3675

CVE-2022-3675 affects Fedora CoreOS where a misconfiguration in GRUB password handling allows booting non-default OSTree deployments without entering a password, potentially reverting security fixes. Affected behavior: GRUB password protects access to GRUB CLI and kernel cmdline modifications, bu...

CVE-2022-3675

Fedora CoreOS supports setting a GRUB bootloader password using a Butane config. When this feature is enabled, GRUB requires a password to access the GRUB command-line, modify kernel command-line arguments, or boot non-default OSTree deployments. Recent Fedora CoreOS releases have a...