CVE-2021-3981

CVSS V2 Low 2.1 CVSS V3 Low 3.3
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.
Overview
  • CVE ID
  • CVE-2021-3981
  • Assigner
  • secalert@redhat.com
  • Vulnerability Status
  • Modified
  • Published Version
  • 2022-03-10T17:43:14
  • Last Modified Date
  • 2023-02-12T23:43:06
Weakness Enumerations
CWE URL
CWE-276 http://cwe.mitre.org/data/definitions/276.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:* 1 OR 2.06
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:P/I:N/A:N
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • NONE
  • Availability Impact
  • NONE
  • Base Score
  • 2.1
  • Severity
  • LOW
  • Exploitability Score
  • 3.9
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • LOW
  • Availability Impact
  • NONE
  • Base Score
  • 3.3
  • Base Severity
  • LOW
  • Exploitability Score
  • 1.8
  • Impact Score
  • 1.4
References
Reference URL Reference Tags
https://access.redhat.com/errata/RHSA-2022:2110
https://access.redhat.com/security/cve/CVE-2021-3981
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
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-3981
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3981
History
Created Old Value New Value Data Type Notes
2022-05-10 15:45:55 Added to TrackCVE
2022-12-06 11:43:10 2022-03-10T17:43Z 2022-03-10T17:43:14 CVE Published Date updated
2022-12-06 11:43:10 2022-10-28T13:22:02 CVE Modified Date updated
2022-12-06 11:43:10 Analyzed Vulnerability Status updated
2022-12-06 11:43:15 References updated
2023-02-02 23:13:16 2023-02-02T21:21:38 CVE Modified Date updated
2023-02-02 23:13:16 Analyzed Modified Vulnerability Status updated
2023-02-02 23:13:17 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. Description updated
2023-02-02 23:13:19 References updated
2023-02-13 00:13:57 2023-02-12T23:43:06 CVE Modified Date updated
2023-02-13 00:13:58 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. Description updated