CVE-2020-15706 MEDIUM

CVE-2020-15706: GRUB2 contains a race condition leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing.

Vendor Ubuntu
Product grub2 in Ubuntu
Weakness CWE-362
Published July 29, 2020
Last update September 16, 2024
View on NVD All CVEs

CVSS base score

6.4/10
Attack vector Local
Attack complexity High
Privileges required High
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

GRUB2 contains a race condition in grub_script_function_create() 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 version 2.04 and prior versions.

Key dates

02Disclosure timeline

July 29, 2020 CVE published
September 16, 2024 Record updated