Nutanix AOS must produce audit records containing the full-text recording of successful and unsuccessful attempts to execute the passwd/gpasswd/unix-chkpwd privileged commands.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-254170	NUTX-OS-000680	SV-254170r958422_rule		Medium

Description
Reconstruction of harmful events or forensic analysis is not possible if audit records do not contain enough information. At a minimum, the organization must audit the full-text recording of privileged commands. The organization must maintain audit trails in sufficient detail to reconstruct events to determine the cause and impact of compromise.

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

Details

Check Text ( C-57655r846596_chk )
Verify Nutanix AOS generates audit records when successful/unsuccessful attempts to use the following commands occur. Check that the following system call is being audited by performing the following command to check the file system rules in "/etc/audit/audit.rules": $ sudo grep -i /usr/bin/passwd /etc/audit/audit.rules If the output is not -a always,exit -F path=/usr/bin/passwd -F auid>=1000 -F auid!=4294967295 -k privileged, this is a finding. $ sudo grep -iw /usr/sbin/unix_chkpwd /etc/audit/audit.rules If the output is not -a always,exit -F path=/usr/sbin/unix_chkpwd -F auid>=1000 -F auid!=4294967295 -k privileged, this is a finding. $ sudo grep -i /usr/bin/gpasswd /etc/audit/audit.rules If the output is not -a always,exit -F path=/usr/bin/gpasswd -F auid>=1000 -F auid!=4294967295 -k privileged, this is a finding.

Check Text ( C-57655r846596_chk )

Verify Nutanix AOS generates audit records when successful/unsuccessful attempts to use the following commands occur.

Check that the following system call is being audited by performing the following command to check the file system rules in "/etc/audit/audit.rules":

$ sudo grep -i /usr/bin/passwd /etc/audit/audit.rules
If the output is not -a always,exit -F path=/usr/bin/passwd -F auid>=1000 -F auid!=4294967295 -k privileged, this is a finding.

$ sudo grep -iw /usr/sbin/unix_chkpwd /etc/audit/audit.rules
If the output is not -a always,exit -F path=/usr/sbin/unix_chkpwd -F auid>=1000 -F auid!=4294967295 -k privileged, this is a finding.

$ sudo grep -i /usr/bin/gpasswd /etc/audit/audit.rules
If the output is not -a always,exit -F path=/usr/bin/gpasswd -F auid>=1000 -F auid!=4294967295 -k privileged, this is a finding.

Fix Text (F-57606r846597_fix)
Configure the audit rules by running the following command: $ sudo salt-call state.sls security/CVM/auditCVM