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OL 8 must not permit direct logons to the root account using remote access via SSH.


Finding ID Version Rule ID IA Controls Severity
V-248613 OL08-00-010550 SV-248613r858578_rule Medium
Although the communications channel may be encrypted, an additional layer of security is gained by extending the policy of not logging on directly as root. In addition, logging on with a user-specific account provides individual accountability of actions performed on the system.
Oracle Linux 8 Security Technical Implementation Guide 2022-12-06


Check Text ( C-52047r858577_chk )
Verify remote access using SSH prevents users from logging on directly as "root" with the following command:

$ sudo grep -ir PermitRootLogin /etc/ssh/sshd_config*

PermitRootLogin no

If the "PermitRootLogin" keyword is set to "yes", is missing, or is commented out, this is a finding.
If conflicting results are returned, this is a finding.
Fix Text (F-52001r779404_fix)
Configure OL 8 to stop users from logging on remotely as the "root" user via SSH.

Edit the appropriate "/etc/ssh/sshd_config" file to uncomment or add the line for the "PermitRootLogin" keyword and set its value to "no":

PermitRootLogin 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