STIGQter: STIG Summary: Riverbed NetIM OS Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 11 Sep 2025:

Ubuntu OS must be configured to use AppArmor.

DISA Rule

SV-275646r1147988_rule

Vulnerability Number

V-275646

Group Title

SRG-OS-000368-GPOS-00154

Rule Version

RIIM-OS-431015

Severity

CAT II

CCI(s)

• CCI-001764 - Prevent program execution in accordance with organization-defined policies, rules of behavior, and/or access agreements regarding software program usage and restrictions; rules authorizing the terms and conditions of software program usage.
• CCI-001774 - Employ a deny-all, permit-by-exception policy to allow the execution of authorized software programs on the system.
• CCI-002235 - Prevent non-privileged users from executing privileged functions.

Weight

10

Fix Recommendation

Enable and start "apparmor.service" by using the following command:

$ sudo systemctl enable apparmor.service --now

Note: AppArmor must have properly configured profiles for applications and home directories. All configurations will be based on the actual system setup and organization and normally are on a per role basis. See the AppArmor documentation for more information on configuring profiles.

Check Contents

Verify Ubuntu OS AppArmor is active by using the following commands:

$ systemctl is-enabled apparmor.service
enabled

$ systemctl is-active apparmor.service
active

If "apparmor.service" is not enabled and active, this is a finding.

Check if AppArmor profiles are loaded and enforced by using the following command:

$ sudo apparmor_status | grep -i profile
32 profiles are loaded.
32 profiles are in enforce mode.
0 profiles are in complain mode.
0 profiles are in kill mode.
0 profiles are in unconfined mode.
2 processes have profiles defined.
0 processes are unconfined but have a profile defined.

If no profiles are loaded and enforced, this is a finding.

Vulnerability Number

V-275646

Documentable

False

Rule Version

RIIM-OS-431015

Severity Override Guidance

Verify Ubuntu OS AppArmor is active by using the following commands:

$ systemctl is-enabled apparmor.service
enabled

$ systemctl is-active apparmor.service
active

If "apparmor.service" is not enabled and active, this is a finding.

Check if AppArmor profiles are loaded and enforced by using the following command:

$ sudo apparmor_status | grep -i profile
32 profiles are loaded.
32 profiles are in enforce mode.
0 profiles are in complain mode.
0 profiles are in kill mode.
0 profiles are in unconfined mode.
2 processes have profiles defined.
0 processes are unconfined but have a profile defined.

If no profiles are loaded and enforced, this is a finding.

Check Content Reference

M

Target Key

5706