Use After Free Affecting grub2-efi-x64-modules package, versions <1:2.02-0.86.el7_8


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.24% (63rd percentile)

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  • Snyk IDSNYK-CENTOS7-GRUB2EFIX64MODULES-2167729
  • published26 Jul 2021
  • disclosed29 Jul 2020

Introduced: 29 Jul 2020

CVE-2020-15706  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Centos:7 grub2-efi-x64-modules to version 1:2.02-0.86.el7_8 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub2-efi-x64-modules package and not the grub2-efi-x64-modules package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

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.

CVSS Scores

version 3.1