Ubuntu.comUB:CVE-2021-3982CVE-2021-3982
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
0.0004 Low
EPSS
Percentile
11.7%
Linux distributions using CAP_SYS_NICE for gnome-shell may be exposed to a
privilege escalation issue. An attacker, with low privilege permissions,
may take advantage of the way CAP_SYS_NICE is currently implemented and
eventually load code to increase its process scheduler priority leading to
possible DoS of other services running in the same machine.
Bugs
- <https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4711>
- <https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2284>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2024174>
Notes
| Author | Note |
|---|---|
| mdeslaur | Red Hat’s gnome-shell packaging was setting CAP_SYS_NICE on the gnome-shell binary. Ubuntu packaging does not do that, so is not vulnerable to this issue. |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 16.04 | noarch | gnome-shell | < any | UNKNOWN |
Related
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
0.0004 Low
EPSS
Percentile
11.7%