SUSE-SU-2021:0776-1 Security update for s390-tools

This update for s390-tools fixes the following issues: - Fixed an issue where IPL was not working when bootloader was installed on a SCSI disk with 4k physical blocksize without using a devicemapper target bsc1183041. - CVE-2021-25316: Do not use predictable temporary file names bsc1182777. - Mad...

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 lockdown variable content directly into memory. The table is further loaded and executed by the kernel defeating its Secure Boot lockdown and allowing the attacker to load unsigned code. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

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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...

grub2 缓冲区错误漏洞

grub2 is a Linux system boot program from the GNU community. A buffer overflow vulnerability exists in grub2 versions prior to 2.06 in the grubusbdeviceinitialize function, which handles USB device initialization. No details of the vulnerability are provided at this time...

grub2 资源管理错误漏洞

grub2 is a Linux system boot program from the GNU community. A resource management error vulnerability exists in grub2 versions prior to 2.06, which stems from the rmmod command. No details of the vulnerability are provided at this time...

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. -...

grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled

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...

grub2: Use-after-free in rmmod command

A flaw was found in grub2. 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...

grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled

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...

grub2: cutmem command allows privileged user to remove memory regions when Secure Boot is enabled

A flaw was found in grub2. 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 threat from this...

grub2: Use-after-free in rmmod command

A flaw was found in grub2. 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...

grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled

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...

grub2: cutmem command allows privileged user to remove memory regions when Secure Boot is enabled

A flaw was found in grub2. 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 threat from this...

grub2: Stack buffer overflow in grub_parser_split_cmdline()

A flaw was found in grub2. 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...

Moderate: Red Hat Security Advisory: grub2 security update

An update for grub2 is now available for Red Hat Enterprise Linux 8.1 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for ea...

[SECURITY] [DSA 4867-1] grub2 security update

------------------------------------------------------------------------- Debian Security Advisory DSA-4867-1 [email protected] https://www.debian.org/security/ Salvatore Bonaccorso March 02, 2021 https://www.debian.org/security/faq -...

[SECURITY] [DSA 4867-1] grub2 security update

------------------------------------------------------------------------- Debian Security Advisory DSA-4867-1 [email protected] https://www.debian.org/security/ Salvatore Bonaccorso March 02, 2021 https://www.debian.org/security/faq -...

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-2020-14372

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...

CVE-2020-26200

CVE-2020-26200 affects a component of Kaspersky’s custom boot loader used by Kaspersky Rescue Disk (KRD) and trusted by the Authentication Agent of Full Disk Encryption in KES. The issue stems from insufficient checks of authenticity for loaded UEFI modules, enabling the loading of untrusted UEFI...