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 Secure Boot protections. 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. 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 references a variable with a sufficiently large payload it is possible to overflow the stack buffer corrupt the stack frame and control execution which could also circumvent Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

...

EulerOS Virtualization 2.9.1 : grub2 (EulerOS-SA-2021-1601)

According to the versions of the grub2 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - 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...

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...

NewStart CGSL CORE 5.04 / MAIN 5.04 : shim Vulnerability (NS-SA-2021-0009)

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has shim 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 allows...

NewStart CGSL CORE 5.04 / MAIN 5.04 : grub2 Multiple Vulnerabilities (NS-SA-2021-0008)

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has grub2 packages installed that are affected by multiple vulnerabilities: - 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...

grub2 code execution vulnerability

grub2 is a Linux system boot program from the GNU community. A security vulnerability exists in versions of grub2 prior to 2.06 where it incorrectly enables the ACPI command when enabling secure boot. The vulnerability allows an attacker with privileged access to create an auxiliary system...

Vulnerabilities fixed in GRUB2

Vulnerabilities have been fixed in GRUB2. The vulnerabilities allow a local malicious person to execute arbitrary code resulting in the circumvention of "Secure Boot." Also, the vulnerabilities can be used to cause a denial-of-service cause. With the exception of the vulnerability with attribute...

Oracle Linux 8 : grub2 (ELSA-2021-0696)

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-0696 advisory. - Add CVE-2020-15706, CVE-2020-15707 to the list Orabug: 31225072 Tenable has extracted the preceding description block directly from the Oracle Linux...

Oracle Linux 7 : grub2 (ELSA-2021-0699)

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-0699 advisory. - Fix another batch of CVEs Resolves: CVE-2020-14372 Resolves: CVE-2020-25632 Resolves: CVE-2020-25647 Resolves: CVE-2020-27749 Resolves: CVE-2020-2777...

grub2 authorization issue vulnerability

grub2 is a Linux system boot program from the GNU community. A security vulnerability in versions of grub2 prior to 2.06, where the cutmem command does not support secure boot locking, allows a privileged attacker to remove address ranges from memory, thus giving the opportunity to bypass secure...

Scientific Linux Security Update : grub2 on SL7.x x86_64 (2021:0699)

The remote Scientific Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the SLSA-2021:0699-1 advisory. - grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled CVE-2020-14372 - grub2: Use-after-free in...

CVE-2020-25647

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...

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-6462 CVE-2020-25647 affecting package grub2 for versions less than 2.06~rc1-7

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...

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...

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...

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...

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-6464 CVE-2020-27779 affecting package grub2 for versions less than 2.06~rc1-7

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...