Vulnerability Discussion

Not exposing the management interface of the chrony daemon on the network diminishes the attack space.

Satisfies: SRG-OS-000096-GPOS-00050, SRG-OS-000095-GPOS-00049

Check

Verify RHEL 10 disables network management of the chrony daemon with the following command:

$ sudo grep -w cmdport /etc/chrony.conf
cmdport 0

If the "cmdport" option is not set to "0", is commented out, or is missing, this is a finding.

Fix

Configure RHEL 10 to disable network management of the chrony daemon by adding/modifying the following line in the "/etc/chrony.conf" file:

cmdport 0

Restart the chronyd service with the following command for the changes to take effect:

$ sudo systemctl restart chronyd