Title

AIX must produce audit records containing information to establish where the events occurred. (Cat II impact)

Discussion

Without establishing where events occurred, it is impossible to establish, correlate, and investigate the events leading up to an outage or attack. In order to compile an accurate risk assessment and provide forensic analysis, it is essential for security personnel to know where events occurred, such as operating system components, modules, device identifiers, node names, file names, and functionality. Associating information about where the event occurred within AIX provides a means of investigating an attack; recognizing resource utilization or capacity thresholds; or identifying an improperly configured operating system.

Check Content

Verify audit event detailed information is displayed: The log file can be set by the "trail" variable in /etc/security/audit/config. # grep trail /etc/security/audit/config trail = /audit/trail Note: The default log file is /audit/trail. Use the following command to display the audit events: # /usr/sbin/auditpr -i <audit log file> -v event login status time command wpar name --------------- -------- ----------- ------------------------ ------------------ ------------- ------------------------- FS_Chdir root OK Sat Aug 26 19:31:37 2017 ps Global change current directory to: /dev FS_Chdir root OK Sat Aug 26 19:31:47 2017 ps Global change current directory to: /dev FS_Chdir root OK Sat Aug 26 19:31:57 2017 ps Global change current directory to: /dev FS_Chdir root OK Sat Aug 26 19:32:07 2017 ps Global change current directory to: /dev FS_Chdir root OK Sat Aug 26 19:32:17 2017 ps Global change current directory to: /dev If event detailed information is not displayed, this is a finding. More information on the command options used above: - v detailed information for the event

Fix Text

Reset the audit system with the following command: # /usr/sbin/audit shutdown Start the audit system with the following command: # /usr/sbin/audit start

Additional Identifiers

Rule ID: SV-215237r508663_rule

Vulnerability ID: V-215237

Group Title: SRG-OS-000039-GPOS-00017

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.