OL 9 must disable the chrony daemon from acting as a server.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-271697	OL09-00-002320	SV-271697r1091803_rule		Low

Description

Minimizing the exposure of the server functionality of the chrony daemon diminishes the attack surface. Satisfies: SRG-OS-000096-GPOS-00050, SRG-OS-000095-GPOS-00049

STIG	Date
Oracle Linux 9 Security Technical Implementation Guide	2025-05-08

Details

Check Text (C-75747r1091801_chk)

Verify that OL 9 disables the chrony daemon from acting as a server with the following command:

$ grep -w port /etc/chrony.conf
port 0

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

Fix Text (F-75654r1091802_fix)

Configure OL 9 to disable the chrony daemon from acting as a server by adding/modifying the following line in the /etc/chrony.conf file:

port 0