cyberstrikeus 3.5.2 Ensure SCTP is disabled (Not Scored)
Profile Applicability
- Level 1 - Server
- Level 1 - Workstation
Description
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.
Rationale
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.
Audit Procedure
Run the following commands and verify the output is as indicated:
modprobe -n -v sctp
# Expected: install /bin/true
lsmod | grep sctp
# Expected: <No output>
Expected Result
install /bin/true
And no output from lsmod | grep sctp.
Remediation
Edit or create the file /etc/modprobe.d/CIS.conf and add the following line:
install sctp /bin/true
Default Value
Not disabled by default.
References
- CIS Controls: 9.1 - Limit Open Ports, Protocols, and Services
Profile
- Level 1 - Server
- Level 1 - Workstation