Detections
Analytics
3.2.1 Ensure sctp kernel module is not available
Information
The Stream Control Transmission Protocol (SCTP) is a transport layer protocol used to support message-oriented communication, with several streams of messages in one connection. It serves a similar function as TCP and UDP, incorporating features of both. It is message-oriented like UDP, and ensures reliable in-sequence transport of messages with congestion control like TCP.-IF- the protocol is not being used, it is recommended that kernel module not be loaded, disabling the service to reduce the potential attack surface.
Solution
Run the following script to disable the sctp module:# printf 'module_blacklist="sctp"\n' >> /boot/loader.conf
A system reboot is preferred to make sure that sctp kernel was not loaded and active.
See Also
Item Details
Audit Name: CIS FreeBSD 14 v1.0.1 L2
Category: CONFIGURATION MANAGEMENT, SYSTEM AND INFORMATION INTEGRITY
References: 800-53|CM-6, 800-53|CM-7, 800-53|SI-4, CSCv7|9.2
Plugin: Unix
Control ID: 6aa521881a6c005ae731190df287769a681c54c1ad3b876912d2c0a6e66f56ab