Incorrect Default Permissions Affecting grub2 package, versions <2.06-8


Severity

Recommended
0.0
low
0
10

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Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-DEBIAN13-GRUB2-5681759
  • published10 Dec 2021
  • disclosed10 Mar 2022

Introduced: 10 Dec 2021

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

How to fix?

Upgrade Debian:13 grub2 to version 2.06-8 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub2 package and not the grub2 package as distributed by Debian. See How to fix? for Debian:13 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