Nutanix AOS must generate audit records when successful/unsuccessful attempts to modify privileges occur.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-254151	NUTX-OS-000450	SV-254151r991572_rule		Medium

Description
Without generating audit records 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).

STIG	Date
Nutanix AOS 5.20.x OS Security Technical Implementation Guide	2024-06-18

Details

Check Text ( C-57636r846539_chk )
Confirm Nutanix AOS generates audit records when successful/unsuccessful attempts to modify privileged objects occur. $ sudo grep /etc/sudoers /etc/audit/audit.rules -w /etc/sudoers -p wa -k actions $ sudo grep /etc/sudoers.d/ /etc/audit/audit.rules -w /etc/sudoers.d/ -p wa -k actions $ sudo grep -w /usr/bin/su /etc/audit/audit.rules -a always,exit -F path=/usr/bin/su -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged $ sudo grep -w sudo /etc/audit/audit.rules -a always,exit -F path=/usr/bin/sudo -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged $ sudo grep -w newgrp /etc/audit/audit.rules -a always,exit -F path=/usr/bin/newgrp -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged $ sudo grep -i /usr/bin/chsh /etc/audit/audit.rules -a always,exit -F path=/usr/bin/chsh -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged If the privileged activities access listed do not return any output, this is a finding.

Check Text ( C-57636r846539_chk )

Confirm Nutanix AOS generates audit records when successful/unsuccessful attempts to modify privileged objects occur.

$ sudo grep /etc/sudoers /etc/audit/audit.rules
-w /etc/sudoers -p wa -k actions

$ sudo grep /etc/sudoers.d/ /etc/audit/audit.rules
-w /etc/sudoers.d/ -p wa -k actions

$ sudo grep -w /usr/bin/su /etc/audit/audit.rules
-a always,exit -F path=/usr/bin/su -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged

$ sudo grep -w sudo /etc/audit/audit.rules
-a always,exit -F path=/usr/bin/sudo -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged

$ sudo grep -w newgrp /etc/audit/audit.rules
-a always,exit -F path=/usr/bin/newgrp -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged

$ sudo grep -i /usr/bin/chsh /etc/audit/audit.rules
-a always,exit -F path=/usr/bin/chsh -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged

If the privileged activities access listed do not return any output, this is a finding.

Fix Text (F-57587r846540_fix)
Configure the audit rules by running the following command: $ sudo salt-call state.sls security/CVM/auditCVM