Arbitrary Code Execution

grub2 is vulnerable to arbitrary code execution...

CVE-2020-14372: Incomplete List of Disallowed Inputs

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...

SUSE SLES12 Security Update : grub2 (SUSE-SU-2021:0679-1)

This update for grub2 fixes the following issues : grub2 now implements the new 'SBAT' method for SHIM based secure boot revocation. bsc1182057 Following security issues are fixed that can violate secure boot constraints : CVE-2020-25632: Fixed a use-after-free in rmmod command bsc1176711...

CVE-2020-27779: Improper Authorization

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...

grub2 安全漏洞

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...

CVE-2021-20233: Out-of-bounds Write

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...

grub2 缓冲区错误漏洞

grub2 is a Linux system boot program from the GNU community. A security vulnerability exists in versions of grub2 prior to 2.06. Setparamprefix in the menu presentation code performs length calculations based on the premise that it takes three characters to represent a single quote with a quotati...

Debian DSA-4867-1 : grub2 - security update

Several vulnerabilities have been discovered in the GRUB2 bootloader. - CVE-2020-14372 It was discovered that the acpi command allows a privileged user to load crafted ACPI tables when Secure Boot is enabled. - CVE-2020-25632 A use-after-free vulnerability was found in the rmmod command. -...

CVE-2020-27749: Stack-based Buffer Overflow

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...

CVE-2020-25632: Use After Free

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...

CVE-2021-20225: Out-of-bounds Write

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: Security Advisory (DSA-4867-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2021 Greenbone AG 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-only ifdescription...

Important Photon OS Security Update - PHSA-2021-0202

Updates of 'grub2', 'openvswitch' packages of Photon OS have been released...

CVE-2020-25647: Out-of-bounds Write

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...

SUSE SLED15 / SLES15 Security Update : grub2 (SUSE-SU-2021:0683-1)

This update for grub2 fixes the following issues : grub2 implements the new 'SBAT' method for SHIM based secure boot revocation. bsc1182057 CVE-2020-25632: Fixed a use-after-free in rmmod command bsc1176711 CVE-2020-25647: Fixed an out-of-bound write in grubusbdeviceinitialize bsc1177883...

SUSE SLES12 Security Update : grub2 (SUSE-SU-2021:0681-1)

This update for grub2 fixes the following issues : grub2 now implements the new 'SBAT' method for SHIM based secure boot revocation. bsc1182057 Following security issues are fixed that can violate secure boot constraints : CVE-2020-25632: Fixed a use-after-free in rmmod command bsc1176711...

RHEL 7 : grub2 (RHSA-2021:0700)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:0700 advisory. The grub2 packages provide version 2 of the Grand Unified Boot Loader GRUB, a highly configurable and customizable boot loader with modular...

Oracle Linux 7 : grub2 (ELSA-2021-9076)

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-9076 advisory. - Fix CVE-2020-14372 CVE-2020-25632 CVE-2020-25647 CVE-2020-27749 CVE-2020-27779 CVE-2021-20225 CVE-2021-20233 Orabug: 32530657 Tenable has extracted t...

SUSE SLES15 Security Update : grub2 (SUSE-SU-2021:0684-1)

This update for grub2 fixes the following issues : grub2 now implements the new 'SBAT' method for SHIM based secure boot revocation. bsc1182057 Following security issues are fixed that can violate secure boot constraints : CVE-2020-25632: Fixed a use-after-free in rmmod command bsc1176711...

RHEL 7 : grub2 (RHSA-2021:0701)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:0701 advisory. The grub2 packages provide version 2 of the Grand Unified Boot Loader GRUB, a highly configurable and customizable boot loader with modular...