Nutanix AOS must generate audit records for privileged security activities.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-254156	NUTX-OS-000520	SV-254156r846556_rule		Medium

Description
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).

STIG	Date
Nutanix AOS 5.20.x OS Security Technical Implementation Guide	2022-08-24

Details

Check Text ( C-57641r846554_chk )
Confirm Nutanix AOS generates audit records for privileged activities or other system-level access. $ sudo grep /etc/shadow /etc/audit/audit.rules -w /etc/shadow -p wa -k audit_account_changes $ sudo grep /etc/security/opasswd /etc/audit/audit.rules -w /etc/security/opasswd -p wa -k audit_account_changes $ sudo grep /etc/passwd /etc/audit/audit.rules -w /etc/passwd -p wa -k audit_account_changes $ sudo grep /etc/gshadow /etc/audit/audit.rules -w /etc/gshadow -p wa -k audit_account_changes $ sudo grep /etc/group /etc/audit/audit.rules -w /etc/group -p wa -k audit_account_changes $ 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 gpasswd /etc/audit/audit.rules -a always,exit -F path=/usr/bin/gpasswd -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged $ sudo grep -w passwd /etc/audit/audit.rules -a always,exit -F path=/usr/sbin/userhelper -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged-passwd If the privileged activities access listed do not return any output, this is a finding.

Check Text ( C-57641r846554_chk )

Confirm Nutanix AOS generates audit records for privileged activities or other system-level access.

$ sudo grep /etc/shadow /etc/audit/audit.rules
-w /etc/shadow -p wa -k audit_account_changes

$ sudo grep /etc/security/opasswd /etc/audit/audit.rules
-w /etc/security/opasswd -p wa -k audit_account_changes

$ sudo grep /etc/passwd /etc/audit/audit.rules
-w /etc/passwd -p wa -k audit_account_changes

$ sudo grep /etc/gshadow /etc/audit/audit.rules
-w /etc/gshadow -p wa -k audit_account_changes

$ sudo grep /etc/group /etc/audit/audit.rules
-w /etc/group -p wa -k audit_account_changes

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

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

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

Fix Text (F-57592r846555_fix)
Configure the audit rules by running the following command. $ sudo salt-call state.sls security/CVM/auditCVM