CVE-2020-10713

Name of the Vulnerable Software and Affected Versions GRUB2 versions prior to 2.06

Description A flaw was found in GRUB2 that allows an attacker to hijack and tamper with the GRUB verification process, bypassing Secure Boot protections. This can be exploited to load an untrusted or modified kernel, potentially leading to arbitrary code execution within GRUB. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. An attacker would first need to establish access to the system, such as gaining physical access or obtaining remote access to a networked system with root access. With this access, an attacker could craft a string to cause a buffer overflow by injecting a malicious payload.

Recommendations To resolve the issue for GRUB2 versions prior to 2.06, update to version 2.06 or later. As a temporary workaround, consider restricting access to the GRUB configuration file to minimize the risk of exploitation. Additionally, ensure that Secure Boot is enabled and properly configured to reduce the risk of malicious code execution.