V-279561

Discussion

Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter).

Check Content

Verify Nutanix OS generates audit records for all kernel module load, unload, restart actions, and initiations using the following commands.

$ sudo grep -iw create_module /etc/audit/audit.rules
-a always,exit -F arch=b32 -S create_module -k module-change
-a always,exit -F arch=b64 -S create_module -k module-change

$ sudo grep -iw init_module /etc/audit/audit.rules 
-a always,exit -F arch=b64 -S init_module -S delete_module -k modules
-a always,exit -F arch=b32 -S init_module -S delete_module -k modules

$ sudo grep -iw finit_module /etc/audit/audit.rules
-a always,exit -F arch=b32 -S finit_module -k module-change
-a always,exit -F arch=b64 -S finit_module -k module-change

$ sudo grep -iw delete_module /etc/audit/audit.rules
-a always,exit -F arch=b64 -S init_module -S delete_module -k modules
-a always,exit -F arch=b32 -S init_module -S delete_module -k modules

$ sudo grep -iw kmod /etc/audit/audit.rules
-w /usr/bin/kmod -p x -F auid!=unset -k module-change

If both the "b32" and "b64" audit rules are not defined for the module(s) listed syscall or does not produce an output, this is a finding.