CVE-2021-3981

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.

Category

3.3
CVSS
Severity: Low
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.01%
Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org
Affected: n/a grub2
Published at:
Updated at:

References

Link Tags
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AI776L35DDYPCSAAJPJM3ZEQYSFZHBJX/ vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2024170 patch third party advisory issue tracking
https://security.gentoo.org/glsa/202209-12 third party advisory vendor advisory
http://www.openwall.com/lists/oss-security/2024/01/15/3

Frequently Asked Questions

What is the severity of CVE-2021-3981?
CVE-2021-3981 has been scored as a low severity vulnerability.
How to fix CVE-2021-3981?
To fix CVE-2021-3981, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-3981 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-3981 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3981?
CVE-2021-3981 affects n/a grub2.
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