CVE-2020-14372

A flaw was found in GRUB 2, where it incorrectly enables the usage of the ACPI command when Secure Boot is enabled. This flaw allows an attacker with privileged access to craft a Secondary System Description Table SSDT containing code to overwrite the Linux kernel lockdown variable content direct...

CVE-2021-3418

If certificates that signed grub are installed into db, grub can be booted directly. It will then boot any kernel without signature validation. The booted kernel will think it was booted in secureboot mode and will implement lockdown, yet it could have been tampered. This flaw is a reintroduction...

UBUNTU-CVE-2020-14372

A flaw was found in grub2 in versions prior to 2.06, where it incorrectly enables the usage of the ACPI command when Secure Boot is enabled. This flaw allows an attacker with privileged access to craft a Secondary System Description Table SSDT containing code to overwrite the Linux kernel lockdow...

UBUNTU-CVE-2020-25632

A flaw was found in grub2 in versions prior to 2.06. The rmmod implementation allows the unloading of a module used as a dependency without checking if any other dependent module is still loaded leading to a use-after-free scenario. This could allow arbitrary code to be executed or a bypass of...

UBUNTU-CVE-2020-27779

A flaw was found in grub2 in versions prior to 2.06. The cutmem command does not honor secure boot locking allowing an privileged attacker to remove address ranges from memory creating an opportunity to circumvent SecureBoot protections after proper triage about grub's memory layout. The highest...

UBUNTU-CVE-2021-20225

A flaw was found in grub2 in versions prior to 2.06. The option parser allows an attacker to write past the end of a heap-allocated buffer by calling certain commands with a large number of specific short forms of options. The highest threat from this vulnerability is to data confidentiality and...

kexec-tools bug fix and enhancement update

The kexec-tools packages contain the /sbin/kexec binary and utilities that together form the user-space component of the kernel's kexec feature. The /sbin/kexec binary facilitates a new kernel to boot using the kernel's kexec feature either on a normal or a panic reboot. The kexec fastboot...

The vulnerability of the Grub loader of Cisco IOS XR operating systems and Network Convergence System 540 Series routers, as well as Cisco 8000 Series routers, allows a hacker to execute arbitrary code.

The vulnerability of the Grub loader in Cisco IOS XR routers from the Network Convergence System 540 Series and Cisco 8000 Series is related to errors in checking the cryptographic signature. Exploiting this vulnerability can allow an attacker to execute arbitrary code...

PT-2021-5815

Name of the Vulnerable Software and Affected Versions grub2 versions prior to 2.06 Description A flaw was found in the menu rendering code of grub2, specifically in the Setparam prefix function, which performs a length calculation on the assumption that expressing a quoted single quote will requi...

Security update for cobbler (moderate)

openSUSE Security Update: Security update for cobbler Announcement ID: openSUSE-SU-2021:0058-1 Rating: moderate References: 1020376 1029276 1048183 1074594 1075014 1081714 1081739 1090205 1097733 1101670 1104189 1104190 1104287 1105440 1105442 1113747 1128754 1128926 1130658 1134588 1149075 11518...

Security update for cobbler (moderate)

openSUSE Security Update: Security update for cobbler Announcement ID: openSUSE-SU-2021:0046-1 Rating: moderate References: 1020376 1029276 1048183 1074594 1075014 1081714 1081739 1090205 1097733 1101670 1104189 1104190 1104287 1105440 1105442 1113747 1128754 1128926 1130658 1134588 1149075 11518...

CVE-2020-24637

Two vulnerabilities in ArubaOS GRUB2 implementation allows for an attacker to bypass secureboot. Successful exploitation of this vulnerability this could lead to remote compromise of system integrity by allowing an attacker to load an untrusted or modified kernel in Aruba 9000 Gateway; Aruba 7000...

Fedora 33 : xen (2020-ec84c1565b)

revised patch for XSA-286 mitigating performance impact ---- x86 PV guest INVLPG-like flushes may leave stale TLB entries XSA-286, CVE-2020-27674 1891092 simplify grub scripts patches from Thierry Vignaud some fixes for gcc 11 Note that Tenable Network Security has extracted the preceding...

grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process

A flaw was found in grub2, prior to version 2.06. An attacker may use the GRUB 2 flaw to hijack and tamper the GRUB verification process. This flaw also allows the bypass of Secure Boot protections. In order to load an untrusted or modified kernel, an attacker would first need to establish access...

grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process

A flaw was found in grub2, prior to version 2.06. An attacker may use the GRUB 2 flaw to hijack and tamper the GRUB verification process. This flaw also allows the bypass of Secure Boot protections. In order to load an untrusted or modified kernel, an attacker would first need to establish access...

[SECURITY] Fedora 31 Update: grub2-2.02-110.fc31

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...

Fedora: Security Advisory for grub2 (FEDORA-2020-e19b87f4f5)

The remote host is missing an update for the Copyright C 2020 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...

There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized memory allocation with subsequent heap-based buffer overflow.

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Fedora: Security Advisory for grub2 (FEDORA-2020-41e57d7649)

The remote host is missing an update for the Copyright C 2020 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...

[SECURITY] Fedora 32 Update: grub2-2.04-22.fc32

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...