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V-248714

CAT I (High)

OL 8 must not allow accounts configured with blank or null passwords.

Rule ID

SV-248714r991589_rule

STIG

Oracle Linux 8 Security Technical Implementation Guide

Version

V2R8

CCIs

CCI-000366

Discussion

If an account has an empty password, anyone could log on and run commands with the privileges of that account. Accounts with empty passwords should never be used in operational environments.

Check Content

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

$ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*permitemptypasswords'

PermitEmptyPasswords no

If "PermitEmptyPasswords" is set to "yes", this is a finding.

If conflicting results are returned, this is a finding.

Fix Text

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