The Stream Control Transmission Protocol (SCTP) must be disabled unless required.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-240421	VRAU-SL-000500	SV-240421r671004_rule		Medium

Description
The SCTP is an IETF-standardized transport layer protocol. This protocol is not yet widely used. Binding this protocol to the network stack increases the attack surface of the host. Unprivileged local processes may be able to cause the kernel 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-43654r671002_chk )
Verify the SCTP protocol handler is prevented from dynamic loading: # grep "install sctp /bin/true" /etc/modprobe.conf /etc/modprobe.conf.local /etc/modprobe.d/* If no result is returned, this is a finding.

Fix Text (F-43613r671003_fix)
Prevent the SCTP protocol handler for dynamic loading: # echo "install sctp /bin/true" >> /etc/modprobe.conf.local