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V-257946

CAT III (Low)

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

Rule ID

SV-257946r1184307_rule

STIG

Red Hat Enterprise Linux 9 Security Technical Implementation Guide

Version

V2R8

CCIs

CCI-000381 CCI-000382

Discussion

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

Check Content

Note: If the server is serving as an NTP server, this is not applicable.

Verify RHEL 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

Configure RHEL 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