10927 matches found
GRUB2 Arbitrary Code Execution Vulnerability
On July 29, 2020, a research paper titled “There’s a Hole in the Boot” was made publicly available. This paper discusses a vulnerability discovered in the GRand Unified Bootloader version 2 GRUB2 bootloader that may allow an attacker to execute arbitrary code at system boot time. The vulnerabilit...
SUSE-SU-2020:14444-1 Security update for xen
This update for xen fixes the following issues: - bsc1174543 - secure boot related fixes - bsc1163019 - CVE-2020-8608: potential OOB access due to unsafe snprintf usages - bsc1169392 - CVE-2020-11742: Bad continuation handling in GNTTABOPcopy - bsc1168140 - CVE-2020-11740, CVE-2020-11741: multipl...
Vulnerabilities fixed in GRUB2
Researchers have found multiple vulnerabilities in GRUB2. The vulnerability with reference CVE-2020-10713 has been named "Boothole." assigned. This vulnerability allows a malicious person with physical access to the system or a malicious person with administrator privileges able to execute...
GRUB2 Boothole Buffer Overflow Vulnerability (CVE-2020-10713) – Automatically Discover, Prioritize and Remediate Using Qualys VMDR®
On July 29, 2020, Eclypsium researchers disclosed a high-risk vulnerability in GRUB2 GRand Unified Bootloader version 2 affecting billions of Linux and Windows systems, even when secure boot is enabled. CVE-2020-10713 is assigned to this buffer overflow vulnerability, termed as “Boothole”...
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: Integer overflow in initrd size handling
Integer overflows were discovered in the functions grubcmdinitrd and grubinitrdinit in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu the functionality is not included in GRUB2 upstream, leading to a heap-based buffer overflow. These could be triggered by an extremely...
Moderate: Red Hat Security Advisory: grub2 security and bug fix update
An update for grub2, shim, shim-signed, and fwupdate is now available for Red Hat Enterprise Linux 7.7 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...
grub2: Fail kernel validation without shim protocol
GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim...
grub2: Use-after-free redefining a function whilst the same function is already executing
GRUB2 contains a race condition in grubscriptfunctioncreate leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2...
grub2: Fail kernel validation without shim protocol
GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim...
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...
Moderate: Red Hat Security Advisory: grub2 security and bug fix update
An update for grub2, shim, and shim-signed is now available for Red Hat Enterprise Linux 7.3 Advanced Update Support, Red Hat Enterprise Linux 7.3 Telco Extended Update Support, and Red Hat Enterprise Linux 7.3 Update Services for SAP Solutions. Red Hat Product Security has rated this update as...
grub2: Use-after-free redefining a function whilst the same function is already executing
GRUB2 contains a race condition in grubscriptfunctioncreate leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2...
grub2: Integer overflow in initrd size handling
Integer overflows were discovered in the functions grubcmdinitrd and grubinitrdinit in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu the functionality is not included in GRUB2 upstream, leading to a heap-based buffer overflow. These could be triggered by an extremely...
grub2: Integer overflow in initrd size handling
Integer overflows were discovered in the functions grubcmdinitrd and grubinitrdinit in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu the functionality is not included in GRUB2 upstream, leading to a heap-based buffer overflow. These could be triggered by an extremely...
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: Fail kernel validation without shim protocol
GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim...
Moderate: Red Hat Security Advisory: grub2 security and bug fix update
An update for grub2, shim, shim-signed, and fwupdate is now available for Red Hat Enterprise Linux 7.6 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...
grub2: Use-after-free redefining a function whilst the same function is already executing
GRUB2 contains a race condition in grubscriptfunctioncreate leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2...
grub2: Use-after-free redefining a function whilst the same function is already executing
GRUB2 contains a race condition in grubscriptfunctioncreate leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2...