Incorrect Default Permissions Affecting grub2-efi-aa64 package, versions <1:2.02-123.el8


Severity

Recommended
0.0
low
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-RHEL8-GRUB2EFIAA64-4269175
  • published20 Nov 2021
  • disclosed17 Nov 2021

Introduced: 17 Nov 2021

CVE-2021-3981  (opens in a new tab)
CWE-276  (opens in a new tab)

How to fix?

Upgrade RHEL:8 grub2-efi-aa64 to version 1:2.02-123.el8 or higher.
This issue was patched in RHSA-2022:2110.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub2-efi-aa64 package and not the grub2-efi-aa64 package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

A flaw in grub2 was found where its configuration file, known as grub.cfg, is being created with the wrong permission set allowing non privileged users to read its content. This represents a low severity confidentiality issue, as those users can eventually read any encrypted passwords present in grub.cfg. This flaw affects grub2 2.06 and previous versions. This issue has been fixed in grub upstream but no version with the fix is currently released.

CVSS Scores

version 3.1