Low severity · published Mar 10, 2022
CVE-2021-3981
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
3.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 25% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
34 · source: NVD
GR
Grub2 · Gnu
through 2.06 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3981
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3981
www.openwall.com
http://www.openwall.com/lists/oss-security/2024/01/15/3
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2024170
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AI776L35DDYPCSAAJPJM3ZEQYSFZHBJX/
Third Party Advisory
https://security.gentoo.org/glsa/202209-12
More from Fedora
10.0
CVE-2021-44228
Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints
10.0
CVE-2015-3306
ProFTPD Improper Access Control Vulnerability
9.8
CVE-2024-4577
Argument Injection in PHP-CGI
9.8
CVE-2021-44026
Roundcube Webmail SQL Injection Vulnerability
9.8
CVE-2021-42013
Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
