CVE-2021-3981
Grub2 Information Disclosure Vulnerability
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.
INFO
Published Date :
March 10, 2022, 5:43 p.m.
Last Modified :
Jan. 16, 2024, 1:15 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
1.4
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-3981.
| URL | Resource |
|---|---|
| http://www.openwall.com/lists/oss-security/2024/01/15/3 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2024170 | Issue Tracking Patch Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AI776L35DDYPCSAAJPJM3ZEQYSFZHBJX/ | |
| https://security.gentoo.org/glsa/202209-12 | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-3981 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-3981 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Jan. 16, 2024
Action Type Old Value New Value Added Reference Red Hat, Inc. http://www.openwall.com/lists/oss-security/2024/01/15/3 [No types assigned] -
CVE Modified by [email protected]
Feb. 12, 2023
Action Type Old Value New Value Changed 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. 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. Removed CVSS V3.1 Red Hat, Inc. AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Removed Reference https://access.redhat.com/errata/RHSA-2022:2110 [No Types Assigned] Removed Reference https://access.redhat.com/security/cve/CVE-2021-3981 [No Types Assigned] Added CWE Red Hat, Inc. CWE-276 -
CVE Modified by [email protected]
Feb. 02, 2023
Action Type Old Value New Value Changed 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. 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. Added CVSS V3.1 Red Hat, Inc. AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Removed Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/AI776L35DDYPCSAAJPJM3ZEQYSFZHBJX/ [Mailing List, Third Party Advisory] Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AI776L35DDYPCSAAJPJM3ZEQYSFZHBJX/ [No Types Assigned] Added Reference https://access.redhat.com/security/cve/CVE-2021-3981 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2022:2110 [No Types Assigned] Removed CWE Red Hat, Inc. CWE-276 -
Modified Analysis by [email protected]
Oct. 28, 2022
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202209-12 No Types Assigned https://security.gentoo.org/glsa/202209-12 Third Party Advisory -
CVE Modified by [email protected]
Sep. 25, 2022
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202209-12 [No Types Assigned] -
Initial Analysis by [email protected]
Mar. 14, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2024170 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2024170 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/AI776L35DDYPCSAAJPJM3ZEQYSFZHBJX/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/AI776L35DDYPCSAAJPJM3ZEQYSFZHBJX/ Mailing List, Third Party Advisory Added CWE NIST CWE-276 Added CPE Configuration OR *cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:* versions up to (including) 2.06 Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-3981 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-3981
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} -0.00%
score
0.12012
percentile