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 have accounts configured with blank or null passwords.

DISA Rule

SV-230380r627750_rule

Vulnerability Number

V-230380

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

RHEL-08-020330

Severity

CAT I

CCI(s)

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

Weight

10

Fix Recommendation

Remove any instances of the "nullok" option in "/etc/pam.d/system-auth" and "/etc/pam.d/password-auth" and add or edit the following line in "etc/ssh/sshd_config" to prevent logons with empty passwords.

PermitEmptyPasswords 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

Note: Manual changes to the listed files may be overwritten by the "authselect" program.

Check Contents

To verify that null passwords cannot be used, run the following commands:

$ sudo grep -i nullok /etc/pam.d/system-auth /etc/pam.d/password-auth

If this produces any output, it may be possible to log on with accounts with empty passwords.

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

PermitEmptyPasswords no

If "PermitEmptyPasswords" is set to "yes", or If null passwords can be used, this is a finding.

Note: Manual changes to the listed files may be overwritten by the "authselect" program.

Vulnerability Number

V-230380

Documentable

False

Rule Version

RHEL-08-020330

Severity Override Guidance

To verify that null passwords cannot be used, run the following commands:

$ sudo grep -i nullok /etc/pam.d/system-auth /etc/pam.d/password-auth

If this produces any output, it may be possible to log on with accounts with empty passwords.

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

PermitEmptyPasswords no

If "PermitEmptyPasswords" is set to "yes", or If null passwords can be used, this is a finding.

Note: Manual changes to the listed files may be overwritten by the "authselect" program.

Check Content Reference

M

Target Key

2921

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