← Back to Nutanix Acropolis GPOS Security Technical Implementation Guide

V-279583

CAT II (Medium)

Nutanix OS must define default permissions for all authenticated users so the user can only read and modify their own files.

Rule ID

SV-279583r1192449_rule

STIG

Nutanix Acropolis GPOS Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-000213

Discussion

Setting the most restrictive default permissions ensures that when new accounts are created they do not have unnecessary access.

Check Content

Verify Nutanix AOS defines default permissions for all authenticated users in such a way that the user can only read and modify their own files using the following command.

$ sudo grep -i umask /etc/login.defs
UMASK 077

If the value for the "UMASK" parameter is not "077", or the "UMASK" parameter is missing, or commented out, this is a finding.

Fix Text

1. For AOS, configure the default permissions "UMASK" to "077" using the following command.

salt-call state.sls security/CVM/shellCVM

2. For Prism Central, configure the default permissions "UMASK" to "077" using the following command.

salt-call state.sls security/PCVM/shellPCVM

3. For Files, configure the default permissions "UMASK" to "077" using the following command.

salt-call state.sls security/AFS/shellAFS

4. For AHV, configure the default permissions "UMASK" to "077" using the following command.

salt-call state.sls security/KVM/shellKVM