Nutanix OS must define default permissions for all authenticated users so the user can only read and modify their own files.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-279583 | NXAC-OS-000130 | SV-279583r1192449_rule | CCI-000213 | medium |
| Description | ||||
| Setting the most restrictive default permissions ensures that when new accounts are created they do not have unnecessary access. | ||||
| STIG | Date | |||
| Nutanix Acropolis GPOS Security Technical Implementation Guide | 2026-02-24 | |||
Details
Check Text (C-279583r1192449_chk)
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 (F-84041r1191712_fix)
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