A flaw was found in grub2 in versions prior to 2.06. During USB device initialization descriptors are read with very little bounds checking and assumes the USB device is providing sane values. If properly exploited an attacker could trigger memory corruption leading to arbitrary code execution allowing a bypass of the Secure Boot mechanism. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

...

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 integrity as well as system availability.

...

Cisco IOS XR Software for Cisco 8000 and NCS 540 Routers Image Verification Vulnerabilities (cisco-sa-ioxr-l-zNhcGCBt)

According to its self-reported version, the Cisco IOS XR Software is affected by multiple vulnerabilities that allow an authenticated, local attacker to execute unsigned code during the boot process, as follows: - A vulnerability in the GRUB boot loader of Cisco NCS 540 Series Routers, only when...

NewStart CGSL CORE 5.04 / MAIN 5.04 : fwupdate Vulnerability (NS-SA-2021-0007)

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has fwupdate packages installed that are affected by a vulnerability: - 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...

CVE-2021-3418

A flaw was found in grub. 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. Thi...

ALPINE-CVE-2021-20233

A flaw was found in grub2 in versions prior to 2.06. Setparamprefix in the menu rendering code performs a length calculation on the assumption that expressing a quoted single quote will require 3 characters, while it actually requires 4 characters which allows an attacker to corrupt memory by one...

DEBIAN-CVE-2021-20233

A flaw was found in grub2 in versions prior to 2.06. Setparamprefix in the menu rendering code performs a length calculation on the assumption that expressing a quoted single quote will require 3 characters, while it actually requires 4 characters which allows an attacker to corrupt memory by one...

DEBIAN-CVE-2020-27749

A flaw was found in grub2 in versions prior to 2.06. Variable names present are expanded in the supplied command line into their corresponding variable contents, using a 1kB stack buffer for temporary storage, without sufficient bounds checking. If the function is called with a command line that...

AZL-78302 CVE-2021-20225 affecting package grub2 for versions less than 2.06-26

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...

DEBIAN-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...

DEBIAN-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...

ALPINE-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...

ALPINE-CVE-2020-27749

A flaw was found in grub2 in versions prior to 2.06. Variable names present are expanded in the supplied command line into their corresponding variable contents, using a 1kB stack buffer for temporary storage, without sufficient bounds checking. If the function is called with a command line that...

ALPINE-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...

AZL-6460 CVE-2020-14372 affecting package grub2 for versions less than 2.06~rc1-7

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...

Arbitrary Code Execution

grub is vulnerable to arbitrary code execution. A use-after-free in the mmod implementation allows for the bypass of Secure Boot protections and potentially arbtirary code execution on the host OS...

Arbitrary Code Execution

grub is vulnerable to arbitrary code execution. An attacker is able to remove address ranges from memory via the cutmem command to bypass Secure Boot protections...

Arbitrary Code Execution

grub is vulnerable to arbitrary code execution. The ACPI command is incorrectly enabled when Secure Boot is enabled, allowing an attacker to craft a malicious SSDT that overwrites the memory containing the kernel lockdown variable content, resulting in arbitrary code execution...

Arbitrary Code Execution

grub is vulnerable to arbitrary code execution. An attacker is able to write past end of the heap-allocated buffer in the option parser, resulting in arbitrary code execution...

grub2 安全漏洞

grub2 is a Linux system boot program from the GNU community. GRUB2 has a security vulnerability that allows grub to be booted directly if a certificate signing grub is installed into the db. it can then boot any kernel without signature verification...