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...

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...

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...

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...

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-2021-3697

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...

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...

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...

UBUNTU-CVE-2021-3696

A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of...

UBUNTU-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...

Fedora: Security Advisory for grub2 (FEDORA-2022-9b4f9af4ce)

The remote host is missing an update for the Copyright C 2022 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software; you can...

CLSA-2022-1655822366 Update of grub2

Use CloudLinux vendor cert...

IBM Power System 安全漏洞

The IBM Power System is a Power processor-based server computer from IBM in the United States. A security vulnerability exists in the IBM Power System, which arises from a pre-production kernel package that can be bootstrapped by grub in Secure Boot Mode. These kernel builds do not have the Secur...

grub2: shim_lock verifier allows non-kernel files to be loaded

A flaw was found in grub2. The shimlock verifier from grub2 allows non-kernel files to be loaded when secure boot is enabled, giving the possibility of unverified code or modules to be loaded when it should not be allowed...

grub2: Crafted PNG image may lead to out-of-bound write during huffman table handling

A flaw was found in grub2 when handling a PNG image header. When decoding the data contained in the Huffman table at the PNG file header, an out-of-bounds write may happen on grub's heap...