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...

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...

PT-2022-23603 · Unknown · Fedora Core

Name of the Vulnerable Software and Affected Versions: Fedora CoreOS affected versions not specified Description: The issue is related to a misconfiguration in recent Fedora CoreOS releases that allows booting non-default OSTree deployments without entering a password, even when a GRUB bootloader...

GLSA-202209-12 : GRUB: Multiple Vulnerabilities

The remote host is affected by the vulnerability described in GLSA-202209-12 GRUB: Multiple Vulnerabilities - A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code...

GRUB: Multiple Vulnerabilities

Background GNU GRUB is a multiboot boot loader used by most Linux systems. Description Multiple vulnerabilities have been discovered in GRUB. Please review the CVE identifiers referenced below for details. Impact Please review the referenced CVE identifiers for details. Workaround There is no kno...

The vulnerability of the implementation of the shim_lock verification mechanism in the Grub2 operating system allows a perpetrator to execute arbitrary code and gain full control over the device.

The vulnerability of the shimlock verification mechanism in the Grub2 operating system’s loader is related to incorrect checking of the cryptographic signature. Exploiting this vulnerability allows an attacker to execute arbitrary code and gain full control over the device...

The vulnerability affects the implementation of the Secure Boot protocol for operating system bootloaders like Grub2. This allows attackers to execute arbitrary code and gain full control over the device.

The vulnerability of the Secure Boot implementation of the Grub2 operating system is related to improper verification of the cryptographic signature. Exploiting this vulnerability allows a attacker to execute arbitrary code and gain full control over the device...

ROS-20220920-01

The grubscriptfunctioncreate function of the Grub configuration file has a vulnerability due to a function override error. function override error while this function is already executed. Exploitation of the vulnerability allows an attacker to gain access to confidential data, compromise its...

Insecure Cryptographic Function

grub has insecure cryptographic function. The vulnerability exists due to a lack of validation allowing signed grub which is installed into the db to be booted directly...

grub2: Integer underflow in grub_net_recv_ip4_packets

A flaw was found in grub2 when handling IPv4 packets. This flaw allows an attacker to craft a malicious packet, triggering an integer underflow in grub code. Consequently, the memory allocation for handling the packet data may be smaller than the size needed. This issue causes an out-of-bands wri...

AZL-31036 CVE-2021-3697 affecting package grub2 for versions less than 2.06-12

A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerabili...

AZL-31034 CVE-2021-3695 affecting package grub2 for versions less than 2.06-12

A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent secure boot protections. This issue has a high complexity to be exploited as an...

AZL-34785 CVE-2021-3697 affecting package grub2 for versions less than 2.06-14

A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerabili...

DEBIAN-CVE-2021-3695

A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent secure boot protections. This issue has a high complexity to be exploited as an...

DEBIAN-CVE-2021-3697

A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerabili...

AZL-34783 CVE-2021-3695 affecting package grub2 for versions less than 2.06-14

A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent secure boot protections. This issue has a high complexity to be exploited as an...

ALPINE-CVE-2021-3697

A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerabili...