Check: UBTU-20-010451
Canonical Ubuntu 20.04 LTS STIG:
UBTU-20-010451
(in versions v1 r12 through v1 r1)
Title
The Ubuntu operating system must notify designated personnel if baseline configurations are changed in an unauthorized manner. The file integrity tool must notify the System Administrator when changes to the baseline configuration or anomalies in the operation of any security functions are discovered. (Cat II impact)
Discussion
Unauthorized changes to the baseline configuration could make the system vulnerable to various attacks or allow unauthorized access to the Ubuntu operating system. Changes to Ubuntu operating system configurations can have unintended side effects, some of which may be relevant to security. Detecting such changes and providing an automated response can help avoid unintended, negative consequences that could ultimately affect the security state of the Ubuntu operating system. The Ubuntu operating system's IMO/ISSO and SAs must be notified via email and/or monitoring system trap when there is an unauthorized modification of a configuration item.
Check Content
Verify that Advanced Intrusion Detection Environment (AIDE) notifies the System Administrator when anomalies in the operation of any security functions are discovered with the following command: $ sudo grep SILENTREPORTS /etc/default/aide SILENTREPORTS=no If SILENTREPORTS is uncommented and set to "yes", this is a finding.
Fix Text
Configure the Ubuntu operating system to notify designated personnel if baseline configurations are changed in an unauthorized manner. Modify the "SILENTREPORTS" parameter in the "/etc/default/aide" file with a value of "no" if it does not already exist.
Additional Identifiers
Rule ID: SV-238372r853449_rule
Vulnerability ID: V-238372
Group Title: SRG-OS-000447-GPOS-00201
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-002702 |
The information system shuts the information system down, restarts the information system, and/or initiates organization-defined alternative action(s) when anomalies in the operation of the organization-defined security functions are discovered. |
Controls
Number | Title |
---|---|
SI-6 |
Security Function Verification |