The Datagram Congestion Control Protocol (DCCP) must be disabled unless required.

From Red Hat Enterprise Linux 5 Security Technical Implementation Guide

Part of GEN007080

Associated with IA controls: ECSC-1

Associated with: CCI-000382

SV-37763r1_rule The Datagram Congestion Control Protocol (DCCP) must be disabled unless required.

Vulnerability discussion

The DCCP is a proposed transport layer protocol. This protocol is not yet widely used. Binding this protocol to the network stack increases the attack surface of the host. Unprivileged local processes may be able to cause the system to dynamically load a protocol handler by opening a socket using the protocol.

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Fix text

Prevent the DCCP protocol handler for dynamic loading. # echo "install dccp /bin/true" >> /etc/modprobe.conf # echo "install dccp_ipv4 /bin/true" >> /etc/modprobe.conf # echo "install dccp_ipv6 /bin/true" >> /etc/modprobe.conf

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