cyberstrikeus 3.5.1 Ensure DCCP is disabled (Not Scored)
Profile Applicability
- Level 1 - Server
- Level 1 - Workstation
Description
The Datagram Congestion Control Protocol (DCCP) is a transport layer protocol that supports streaming media and telephony. DCCP provides a way to gain access to congestion control, without having to do it at the application layer, but does not provide in-sequence delivery.
Rationale
If the protocol is not required, it is recommended that the drivers not be installed to reduce the potential attack surface.
Audit Procedure
Run the following commands and verify the output is as indicated:
modprobe -n -v dccp
# Expected: install /bin/true
lsmod | grep dccp
# Expected: <No output>
Expected Result
install /bin/true
And no output from lsmod | grep dccp.
Remediation
Edit or create the file /etc/modprobe.d/CIS.conf and add the following line:
install dccp /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