STIGQter: STIG Summary: Nutanix Acropolis GPOS Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 26 Jan 2026:

Nutanix OS must not allow an unattended or automatic logon to the system.

DISA Rule

SV-279584r1192313_rule

Vulnerability Number

V-279584

Group Title

SRG-OS-000021-GPOS-00005

Rule Version

NXAC-OS-000131

Severity

CAT I

CCI(s)

• CCI-000044 - Enforce the organization-defined limit of consecutive invalid logon attempts by a user during the organization-defined time period.

Weight

10

Fix Recommendation

Configure SSH.

1. For AOS, configure SSH, then restart the SSH for the changes to take effect.

$ sudo salt-call state.sls security/CVM/sshdCVM
$ sudo systemctl restart sshd

2. For Prism Central, configure SSH, then restart the SSH for the changes to take effect.

$ sudo salt-call state.sls security/PCVM/sshdPCVM
$ sudo systemctl restart sshd

3. For Files, configure SSH, then restart the SSH for the changes to take effect.

$ sudo salt-call state.sls security/AFS/sshdAFS
$ sudo systemctl restart sshd

4. For AHV configure SSH, then restart the SSH for the changes to take effect.

$ sudo salt-call state.sls security/KVM/sshdKVM
$ sudo systemctl restart sshd

Check Contents

Verify Nutanix OS does not allow users to override environment variables to the SSH daemon.

1. Check for the value of the "PermitUserEnvironment" keyword using the following command. Verify the "PermitUserEnvironment" keyword is not set to "no", is missing, or is commented out.

$ sudo grep -i permituserenvironment /etc/ssh/sshd_config
PermitUserEnvironment no

2. Verify "HostbasedAuthentication" keyword is not set to "no", is missing, or is commented out.

$ sudo grep -i hostbasedauthentication /etc/ssh/sshd_config
HostbasedAuthentication no

If Nutanix OS does allows users to override environment variables to the SSH daemon, this is a finding.

Vulnerability Number

V-279584

Documentable

False

Rule Version

NXAC-OS-000131

Severity Override Guidance

Verify Nutanix OS does not allow users to override environment variables to the SSH daemon.

1. Check for the value of the "PermitUserEnvironment" keyword using the following command. Verify the "PermitUserEnvironment" keyword is not set to "no", is missing, or is commented out.

$ sudo grep -i permituserenvironment /etc/ssh/sshd_config
PermitUserEnvironment no

2. Verify "HostbasedAuthentication" keyword is not set to "no", is missing, or is commented out.

$ sudo grep -i hostbasedauthentication /etc/ssh/sshd_config
HostbasedAuthentication no

If Nutanix OS does allows users to override environment variables to the SSH daemon, this is a finding.

Check Content Reference

M

Target Key

5730