Ubuntu.comUB:CVE-2021-3981CVE-2021-3981
3.3 Low
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
0.0004 Low
EPSS
Percentile
14.1%
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.
Notes
| Author | Note |
|---|---|
| mdeslaur | Introduced by: https://git.savannah.gnu.org/gitweb/?p=grub.git;a=commit;h=ab2e53c8a196a595e50f1c836bf756b9db1ae68d |
| eslerm | patch applied in grub-2.12-rc1 |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | grub2-signed | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | grub2-signed | < 1.187.3~20.04.1 | UNKNOWN |
| ubuntu | 22.04 | noarch | grub2-signed | < 1.187.3~22.04.1 | UNKNOWN |
| ubuntu | 14.04 | noarch | grub2-signed | < any | UNKNOWN |
| ubuntu | 16.04 | noarch | grub2-signed | < any | UNKNOWN |
| ubuntu | 18.04 | noarch | grub2-unsigned | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | grub2-unsigned | < 2.06-2ubuntu14.1 | UNKNOWN |
| ubuntu | 22.04 | noarch | grub2-unsigned | < 2.06-2ubuntu14.1 | UNKNOWN |
| ubuntu | 16.04 | noarch | grub2-unsigned | < any | UNKNOWN |
Related
3.3 Low
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
0.0004 Low
EPSS
Percentile
14.1%