CVE-2021-3981

LOW

GRUB2 < 2.06 - Unprotected Configuration File Permissions

Title source: llm

Description

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.

References (4)

Core 4

Core References

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AI776L35DDYPCSAAJPJM3ZEQYSFZHBJX/

Issue Tracking, Patch, Third Party Advisory x_refsource_misc

https://bugzilla.redhat.com/show_bug.cgi?id=2024170

Third Party Advisory vendor-advisory x_refsource_gentoo

https://security.gentoo.org/glsa/202209-12

Mailing List

http://www.openwall.com/lists/oss-security/2024/01/15/3

Scores

CVSS v3 3.3

EPSS 0.0002

EPSS Percentile 7.2%

Attack Vector LOCAL

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

Details

CWE

CWE-276

Status published

Products (2)

fedoraproject/fedora 34

gnu/grub2 < 2.06

Published Mar 10, 2022

Tracked Since Feb 18, 2026