The audit system must be configured to audit the loading and unloading of dynamic kernel modules.

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).

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.

1. For AOS, configure the audit rules.

$ sudo salt-call state.sls security/CVM/auditCVM

2. For Prism Central, configure the audit rules.

$ sudo salt-call state.sls security/PCVM/auditPCVM

3. For Files, configure the audit rules.

$ sudo salt-call state.sls security/AFS/auditAFS

4. For AHV, configure the audit rules.

$ sudo salt-call state.sls security/KVM/auditKVM