V-279556

Discussion

Without the capability to generate audit records, 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). The list of audited events is the set of events for which audits are generated. This set of events is typically a subset of the list of all events for which the system can generate audit records. DOD has defined the list of events for which the operating system will provide an audit record generation capability as the following: 1) Successful and unsuccessful attempts to access, modify, or delete privileges, security objects, security levels, or categories of information (e.g., classification levels); 2) Access actions, such as successful and unsuccessful logon attempts, privileged activities or other system-level access, starting and ending time for user access to the system, concurrent logons from different workstations, successful and unsuccessful accesses to objects, all program initiations, and all direct access to the information system; 3) All account creations, modifications, disabling, and terminations; and 4) All kernel module load, unload, and restart actions.

Check Content

Verify Nutanix OS is configured to generate audit records on all kernel module load, unload, and restart actions using the following command.

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

$ sudo cat /boot/grub/grub.conf | grep audit
kernel /boot/vmlinuz-3.10.0-1160.24.1.el7.nutanix.20210425.cvm.x86_64 ro root=UUID=71a1fe8c-812f-4403-80ed-894f554b061c rd_NO_LUKS rd_NO_LVM rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 rhgb crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us audit=1 audit_backlog_limit=8192 nousb fips=1 nomodeset biosdevname=0 net.ifnames=0 scsi_mod.use_blk_mq=y panic=30 console=ttyS0,115200n8 console=tty0 clocksource=tsc kvm_nopvspin=1 xen_nopvspin=1 hv_netvsc.ring_size=512 mds=off mitigations=off

If the commands do not return the appropriate response line, as indicated above, or if the lines are commented out, this is a finding.