STIGQter: STIG Summary: Red Hat Enterprise Linux 8 Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 23 Apr 2021:

RHEL 8 must not allow users to override SSH environment variables.

DISA Rule

SV-230330r646870_rule

Vulnerability Number

V-230330

Group Title

SRG-OS-000480-GPOS-00229

Rule Version

RHEL-08-010830

Severity

CAT II

CCI(s)

• CCI-000366 - The organization implements the security configuration settings.

Weight

10

Fix Recommendation

Configure RHEL 8 to allow the SSH daemon to not allow unattended or automatic logon to the system.

Add or edit the following line in the "/etc/ssh/sshd_config" file:

PermitUserEnvironment no

The SSH daemon must be restarted for the changes to take effect. To restart the SSH daemon, run the following command:

$ sudo systemctl restart sshd.service

Check Contents

Verify that unattended or automatic logon via ssh is disabled with the following command:

$ sudo grep -i PermitUserEnvironment /etc/ssh/sshd_config

PermitUserEnvironment no

If "PermitUserEnvironment" is set to "yes", is missing completely, or is commented out, this is a finding.

Vulnerability Number

V-230330

Documentable

False

Rule Version

RHEL-08-010830

Severity Override Guidance

Verify that unattended or automatic logon via ssh is disabled with the following command:

$ sudo grep -i PermitUserEnvironment /etc/ssh/sshd_config

PermitUserEnvironment no

If "PermitUserEnvironment" is set to "yes", is missing completely, or is commented out, this is a finding.

Check Content Reference

M

Target Key

2921

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