The Red Hat Enterprise Linux operating system must be configured so that the Datagram Congestion Control Protocol (DCCP) kernel module is disabled unless required.

From Red Hat Enterprise Linux 7 Security Technical Implementation Guide

Associated with: CCI-001958

SV-92517r2_rule The Red Hat Enterprise Linux operating system must be configured so that the Datagram Congestion Control Protocol (DCCP) kernel module is disabled unless required.

Vulnerability discussion

Disabling DCCP protects the system against exploitation of any flaws in the protocol implementation.

Check content

Verify the operating system disables the ability to load the DCCP kernel module. # grep -r dccp /etc/modprobe.d/* | grep -i "/bin/true" | grep -v "^#" install dccp /bin/true If the command does not return any output, or the line is commented out, and use of DCCP is not documented with the Information System Security Officer (ISSO) as an operational requirement, this is a finding.

Fix text

Configure the operating system to disable the ability to use the DCCP kernel module. Create a file under "/etc/modprobe.d" with the following command: # touch /etc/modprobe.d/dccp.conf Add the following line to the created file: install dccp /bin/true Ensure that the DCCP module is blacklisted: # vi /etc/modprobe.d/blacklist.conf Add or update the line: blacklist dccp

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