Check: UBTU-20-010437
Canonical Ubuntu 20.04 LTS STIG:
UBTU-20-010437
(in versions v1 r11 through v1 r9)
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 (SA) 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 operating system. Changes to 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 operating system. The 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 SA when anomalies in the operation of any security functions are discovered with the following command: $ grep SILENTREPORTS /etc/default/aide SILENTREPORTS=no If SILENTREPORTS is commented out, this is a finding. If SILENTREPORTS is set to "yes", this is a finding. If SILENTREPORTS is not set to "no", 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-238358r917812_rule
Vulnerability ID: V-238358
Group Title: SRG-OS-000363-GPOS-00150
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-001744 |
The information system implements organization-defined security responses automatically if baseline configurations are changed in an unauthorized manner. |
Controls
Number | Title |
---|---|
CM-3 (5) |
Automated Security Response |