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RHEL-10-701110 RHEL 10 must disable the Stream Control Transmission Protocol (SCTP) kernel module.

DISA STIG library V1R3
All changes in this version
first version loaded CAT II

Maps to CM-7 via CCI-000381

Title

RHEL 10 must disable the Stream Control Transmission Protocol (SCTP) kernel module.

Control

Verify RHEL 10 disables the ability to load the sctp kernel module with the following command: $ sudo grep -rs sctp /etc/modprobe.conf /etc/modprobe.d/* | grep -v '#' /etc/modprobe.d/sctp-blacklist.conf:install sctp /bin/false /etc/modprobe.d/sctp-blacklist.conf:blacklist sctp If the command does not return any output, or the lines are commented out, and use of sctp is not documented with the information system security officer as an operational requirement, this is a finding.

Discussion

It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore, may remain unsecured. They increase the risk to the platform by providing additional attack vectors. Failing to disconnect unused protocols can result in a system compromise. The SCTP is a transport layer protocol, designed to support the idea of message-oriented communication, with several streams of messages within one connection. Disabling SCTP protects the system against exploitation of any flaws in its implementation.

Related controls

CCI-000381

Fix

Configure RHEL 10 to disable the ability to load the sctp kernel module. Create a drop-in if it does not already exist: $ sudo vi /etc/modprobe.d/sctp.conf Add the following lines to the file: install sctp /bin/false blacklist sctp