The DECnet protocol must be disabled or not installed.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-240451	VRAU-SL-000650	SV-240451r671094_rule		Medium

Description
The DECnet suite of protocols is no longer in common use. Binding this protocol to the network stack increases the attack surface of the host. Unprivileged local processes may be able to cause the system to dynamically load a protocol handler by opening a socket using the protocol.

STIG	Date
VMware vRealize Automation 7.x SLES Security Technical Implementation Guide	2021-06-24

Details

Check Text ( C-43684r671092_chk )
Check that the DECnet protocol handler is prevented from dynamic loading: # grep "install decnet /bin/true" /etc/modprobe.conf /etc/modprobe.conf.local /etc/modprobe.d/* If no result is returned, this is a finding.

Fix Text (F-43643r671093_fix)
Prevent the DECnet protocol handler for dynamic loading: # echo "install decnet /bin/true" >> /etc/modprobe.conf.local