AIX must produce audit records containing information to establish where the events occurred.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-91249	AIX7-00-002003	SV-101349r1_rule		Medium

Description
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.

Description

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.

STIG	Date
IBM AIX 7.x Security Technical Implementation Guide	2020-02-24

Details

Check Text ( C-90405r3_chk )
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 -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

Check Text ( C-90405r3_chk )

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 -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 (F-97449r1_fix)
Reset the audit system with the following command: # /usr/sbin/audit shutdown Start the audit system with the following command: # /usr/sbin/audit start