Published: 10/03/2022 Updated: 16/01/2024

CVSS v2 Base Score: 2.1 | Impact Score: 2.9 | Exploitability Score: 3.9

CVSS v3 Base Score: 3.3 | Impact Score: 1.4 | Exploitability Score: 1.8

VMScore: 187

Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N

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.

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gnu grub2
fedoraproject fedora 34

Debian Bug report logs - #1001414 grub2: CVE-2021-3981: Incorrect permission in grubcfg allow unprivileged user to read the file content Package: src:grub2; Maintainer for src:grub2 is GRUB Maintainers <pkg-grub-devel@alioth-listsdebiannet>; Reported by: Salvatore Bonaccorso <carnil@debianorg> Date: Thu, 9 Dec 20 ...

Synopsis Low: grub2 security, bug fix, and enhancement update Type/Severity Security Advisory: Low Red Hat Insights patch analysis Identify and remediate systems affected by this advisory View affected systems Topic An update for grub2 is now available for Red Hat Enterprise Linux 8Red Hat Product Security has rated this update as ...

Synopsis Important: Red Hat OpenShift Service Mesh 213 Containers security update Type/Severity Security Advisory: Important Topic Red Hat OpenShift Service Mesh 213Red Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed sever ...

A flaw in grub2 was found where its configuration file, known as grubcfg, 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 grubcfg (CVE-2021-3981) ...

CWE-276 https://bugzilla.redhat.com/show_bug.cgi?id=2024170 https://security.gentoo.org/glsa/202209-12 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AI776L35DDYPCSAAJPJM3ZEQYSFZHBJX/http://www.openwall.com/lists/oss-security/2024/01/15/3 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1001414 https://nvd.nist.gov https://alas.aws.amazon.com/AL2/ALAS-2022-1787.html

CVE-2021-3981

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