The audit system must be configured to audit all administrative, privileged, and security actions.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-816	GEN002760	SV-40138r1_rule	ECAR-1 ECAR-2 ECAR-3	Medium

Description
If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.

STIG	Date
AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE	2017-12-08

Details

Check Text ( C-28415r1_chk )
Check the auditing configuration of the system. # more /etc/security/audit/events Verify the following events are configured. ACCT_Disable, ACCT_Enable, AUD_it, BACKUP_Export, DEV_Change, DEV_Configure, DEV_Create, FILE_Chpriv, FILE_Fchpriv, FILE_Mknod, FILE_Owner, FS_Chroot, FS_Mount, FS_Umount, PASSWORD_Check, PROC_Adjtime, PROC_Kill, PROC_Privilege, PROC_Setpgid, PROC_SetUserIDs, RESTORE_Import, TCBCK_Delete, USER_Change, USER_Create, USER_Reboot, USER_Remove, and USER_SetEnv If any of these events are missing from the configuration, this is a finding. Check the ACCT_Disable, ACCT_Enable, AUD_it, BACKUP_Export, DEV_Change, DEV_Configure, DEV_Create, FILE_Chpriv, FILE_Fchpriv, FILE_Mknod, FILE_Owner, FS_Chroot, FS_Mount, FS_Umount, PASSWORD_Check, PROC_Adjtime, PROC_Kill, PROC_Privilege, PROC_Setpgid, PROC_SetUserIDs, RESTORE_Import, TCBCK_Delete, USER_Change, USER_Create, USER_Reboot, USER_Remove, and USER_SetEnv audit events are defined in the audit classes' stanza 'classes:' of the /etc/security/audit/config file. #more /etc/security/audit/config Make note of the audit class(es) that the ACCT_Disable, ACCT_Enable, AUD_it, BACKUP_Export, DEV_Change, DEV_Configure, DEV_Create, FILE_Chpriv, FILE_Fchpriv, FILE_Mknod, FILE_Owner, FS_Chroot, FS_Mount, FS_Umount, PASSWORD_Check, PROC_Adjtime, PROC_Kill, PROC_Privilege, PROC_Setpgid, PROC_SetUserIDs, RESTORE_Import, TCBCK_Delete, USER_Change, USER_Create, USER_Reboot, USER_Remove, and USER_SetEnv events are associated with. If the ACCT_Disable, ACCT_Enable, AUD_it, BACKUP_Export, DEV_Change, DEV_Configure, DEV_Create, FILE_Chpriv, FILE_Fchpriv, FILE_Mknod, FILE_Owner, FS_Chroot, FS_Mount, FS_Umount, PASSWORD_Check, PROC_Adjtime, PROC_Kill, PROC_Privilege, PROC_Setpgid, PROC_SetUserIDs, RESTORE_Import, TCBCK_Delete, USER_Change, USER_Create, USER_Reboot, USER_Remove, and USER_SetEnv events are not associated with any audit classes in the classes: stanza, this is a finding. Verify the audit class is associated with the default user and all other user ids listed in the users: stanza of the /etc/security/audit/config file. #more /etc/security/audit/config If the class(es) that the ACCT_Disable, ACCT_Enable, AUD_it, BACKUP_Export, DEV_Change, DEV_Configure, DEV_Create, FILE_Chpriv, FILE_Fchpriv, FILE_Mknod, FILE_Owner, FS_Chroot, FS_Mount, FS_Umount, PASSWORD_Check, PROC_Adjtime,PROC_Kill, PROC_Privilege, PROC_Setpgid, PROC_SetUserIds, RESTORE_Import, TCBCK_Delete, USER_Change, USER_Create, USER_Reboot, USER_Remove, and USER_SetEnv events are not associated with the default user and all the system users in the 'users:' stanza, this is a finding.

Check Text ( C-28415r1_chk )

Check the auditing configuration of the system.
# more /etc/security/audit/events

Verify the following events are configured.
ACCT_Disable, ACCT_Enable, AUD_it, BACKUP_Export, DEV_Change, DEV_Configure, DEV_Create, FILE_Chpriv, FILE_Fchpriv, FILE_Mknod, FILE_Owner, FS_Chroot, FS_Mount, FS_Umount, PASSWORD_Check, PROC_Adjtime, PROC_Kill, PROC_Privilege, PROC_Setpgid, PROC_SetUserIDs, RESTORE_Import, TCBCK_Delete, USER_Change, USER_Create, USER_Reboot, USER_Remove, and USER_SetEnv

If any of these events are missing from the configuration, this is a finding.

Check the ACCT_Disable, ACCT_Enable, AUD_it, BACKUP_Export, DEV_Change, DEV_Configure, DEV_Create, FILE_Chpriv, FILE_Fchpriv, FILE_Mknod, FILE_Owner, FS_Chroot, FS_Mount, FS_Umount, PASSWORD_Check, PROC_Adjtime, PROC_Kill, PROC_Privilege, PROC_Setpgid, PROC_SetUserIDs, RESTORE_Import, TCBCK_Delete, USER_Change, USER_Create, USER_Reboot, USER_Remove, and USER_SetEnv audit events are defined in the audit classes' stanza 'classes:' of the /etc/security/audit/config file.

#more /etc/security/audit/config
Make note of the audit class(es) that the ACCT_Disable, ACCT_Enable, AUD_it, BACKUP_Export, DEV_Change, DEV_Configure, DEV_Create, FILE_Chpriv, FILE_Fchpriv, FILE_Mknod, FILE_Owner, FS_Chroot, FS_Mount, FS_Umount, PASSWORD_Check, PROC_Adjtime, PROC_Kill, PROC_Privilege, PROC_Setpgid, PROC_SetUserIDs, RESTORE_Import, TCBCK_Delete, USER_Change, USER_Create, USER_Reboot, USER_Remove, and USER_SetEnv events are associated with.
If the ACCT_Disable, ACCT_Enable, AUD_it, BACKUP_Export, DEV_Change, DEV_Configure, DEV_Create, FILE_Chpriv, FILE_Fchpriv, FILE_Mknod, FILE_Owner, FS_Chroot, FS_Mount, FS_Umount, PASSWORD_Check, PROC_Adjtime, PROC_Kill, PROC_Privilege, PROC_Setpgid, PROC_SetUserIDs, RESTORE_Import, TCBCK_Delete, USER_Change, USER_Create, USER_Reboot, USER_Remove, and USER_SetEnv events are not associated with any audit classes in the classes: stanza, this is a finding.

Verify the audit class is associated with the default user and all other user ids listed in the users: stanza of the /etc/security/audit/config file.
#more /etc/security/audit/config
If the class(es) that the ACCT_Disable, ACCT_Enable, AUD_it, BACKUP_Export, DEV_Change, DEV_Configure, DEV_Create, FILE_Chpriv, FILE_Fchpriv, FILE_Mknod, FILE_Owner, FS_Chroot, FS_Mount, FS_Umount, PASSWORD_Check, PROC_Adjtime,PROC_Kill, PROC_Privilege, PROC_Setpgid, PROC_SetUserIds, RESTORE_Import, TCBCK_Delete, USER_Change, USER_Create, USER_Reboot, USER_Remove, and USER_SetEnv events are not associated with the default user and all the system users in the 'users:' stanza, this is a finding.

Fix Text (F-24542r1_fix)
Edit /etc/security/audit/events and add the following events to the list of audited events: ACCT_Disable, ACCT_Enable, AUD_it, BACKUP_Export, DEV_Change, DEV_Configure, DEV_Create, FILE_Chpriv, FILE_Fchpriv, FILE_Mknod, FILE_Owner, FS_Chroot, FS_Mount, FS_Umount, PASSWORD_Check, PROC_Adjtime, PROC_Kill, PROC_Privilege, PROC_Setpgid, PROC_SetUserIDs, RESTORE_Import, TCBCK_Delete, USER_Change, USER_Create, USER_Reboot, USER_Remove, and USER_SetEnv. Edit /etc/security/audit/config and add the ACCT_Disable, ACCT_Enable, AUD_it, BACKUP_Export, DEV_Change, DEV_Configure, DEV_Create, FILE_Chpriv, FILE_Fchpriv, FILE_Mknod, FILE_Owner, FS_Chroot, FS_Mount, FS_Umount, PASSWORD_Check, PROC_Adjtime, PROC_Kill, PROC_Privilege, PROC_Setpgid, PROC_SetUserIDs, RESTORE_Import, TCBCK_Delete, USER_Change, USER_Create, USER_Reboot, USER_Remove, and USER_SetEnv audit events to an audit class in the classes: stanza. Edit the /etc/security/audit/config and assign the audit classes with the ACCT_Disable, ACCT_Enable, AUD_it, BACKUP_Export, DEV_Change, DEV_Configure, DEV_Create, FILE_Chpriv, FILE_Fchpriv, FILE_Mknod, FILE_Owner, FS_Chroot, FS_Mount, FS_Umount, PASSWORD_Check, PROC_Adjtime, PROC_Kill, PROC_Privilege, PROC_Setpgid, PROC_SetUserIDs, RESTORE_Import, TCBCK_Delete, USER_Change, USER_Create, USER_Reboot, USER_Remove, and USER_SetEnv events to the all users listed in the users: stanza.

Fix Text (F-24542r1_fix)

Edit /etc/security/audit/events and add the following events to the list of audited events:
ACCT_Disable, ACCT_Enable, AUD_it, BACKUP_Export, DEV_Change, DEV_Configure, DEV_Create, FILE_Chpriv, FILE_Fchpriv, FILE_Mknod, FILE_Owner, FS_Chroot, FS_Mount, FS_Umount, PASSWORD_Check, PROC_Adjtime, PROC_Kill, PROC_Privilege, PROC_Setpgid, PROC_SetUserIDs, RESTORE_Import, TCBCK_Delete, USER_Change, USER_Create, USER_Reboot, USER_Remove, and USER_SetEnv.

Edit /etc/security/audit/config and add the ACCT_Disable, ACCT_Enable, AUD_it, BACKUP_Export, DEV_Change, DEV_Configure, DEV_Create, FILE_Chpriv, FILE_Fchpriv, FILE_Mknod, FILE_Owner, FS_Chroot, FS_Mount, FS_Umount, PASSWORD_Check, PROC_Adjtime, PROC_Kill, PROC_Privilege, PROC_Setpgid, PROC_SetUserIDs, RESTORE_Import, TCBCK_Delete, USER_Change, USER_Create, USER_Reboot, USER_Remove, and USER_SetEnv audit events to an audit class in the classes: stanza.

Edit the /etc/security/audit/config and assign the audit classes with the ACCT_Disable, ACCT_Enable, AUD_it, BACKUP_Export, DEV_Change, DEV_Configure, DEV_Create, FILE_Chpriv, FILE_Fchpriv, FILE_Mknod, FILE_Owner, FS_Chroot, FS_Mount, FS_Umount, PASSWORD_Check, PROC_Adjtime, PROC_Kill, PROC_Privilege, PROC_Setpgid, PROC_SetUserIDs, RESTORE_Import, TCBCK_Delete, USER_Change, USER_Create, USER_Reboot, USER_Remove, and USER_SetEnv events to the all users listed in the users: stanza.