cyberstrikeus CIS Ubuntu Linux 16.04 LTS Benchmark v2.0.0 - Control 3.4.2
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.
Impact
None.
Audit Procedure
Command Line
Run the following commands and verify the output is as indicated:
modprobe -n -v sctp | grep -E '(sctp|install)'
lsmod | grep sctp
Expected Result
install /bin/true
The lsmod command should return no output.
Remediation
Command Line
Edit or create a file in the /etc/modprobe.d/ directory ending in .conf
Example: vi /etc/modprobe.d/sctp.conf
and add the following line:
install sctp /bin/true
Default Value
SCTP module is available but typically not loaded by default.
References
- CIS Ubuntu Linux 16.04 LTS Benchmark v2.0.0
CIS Controls
Version 7
9.2 Ensure Only Approved Ports, Protocols and Services Are Running - Ensure that only network ports, protocols, and services listening on a system with validated business needs, are running on each system.
Profile Applicability
- Level 2 - Server
- Level 2 - Workstation
Assessment Status
Automated