Incomplete Blacklist Affecting grub2-tools package, versions <1:2.02-0.87.0.7.el7


Severity

Recommended
0.0
high
0
10

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.05% (17th percentile)

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  • Snyk IDSNYK-ORACLE7-GRUB2TOOLS-2578231
  • published10 Apr 2022
  • disclosed3 Mar 2021

Introduced: 3 Mar 2021

CVE-2020-14372  (opens in a new tab)
CWE-184  (opens in a new tab)

How to fix?

Upgrade Oracle:7 grub2-tools to version 1:2.02-0.87.0.7.el7 or higher.
This issue was patched in ELSA-2021-9076.

NVD Description

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

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.

CVSS Scores

version 3.1