SV-37603r1: The Reliable Datagram Sockets (RDS) protocol must be disabled or not installed unless required. | Red Hat Enterprise Linux 5 Security Technical Implementation Guide

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Assessment Title

Rule Text

The Reliable Datagram Sockets (RDS) protocol must be disabled or not installed unless required.

Description

Discussion Text

The RDS protocol is a relatively new protocol developed by Oracle for communication between the nodes of a cluster. 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.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-000382CCE-14027-7

Additional Details

Responsibility

System Administrator

IA Controls

ECSC-1

References

DPMS Target Red Hat 5 DISA DPMS Target Red Hat 5 2154

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

#!/bin/bash
# Reconstructed from oval:mil.disa.fso.rhel11:def:407
# The Reliable Datagram Sockets (RDS) protocol must be disabled or not installed unless required.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# check for RDS in /etc/modprobe.conf
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  grep -Pq '^[ 	

]*install[ 	

]+rds[ 	

]+/bin/true' '/etc/modprobe.conf' &>/dev/null
}
# check for RDS in /etc/modprobe.d/*
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  grep -rqP --include='*' '^[ 	

]*install[ 	

]+rds[ 	

]+/bin/true' '/etc/modprobe.d' &>/dev/null
}

if ( test_1 || test_2 ); then
  echo "PASS"
else
  echo "FAIL"
fi

Assessment Script Powered by AISandbox-executed

A standalone Shell script to assess this control automatically. Review before running it in your environment.

Syntax-checked and actually executed in an isolated sandbox (not the real system this checks) — confirmed to run without errors.

#!/bin/sh
# OVAL definition: oval:mil.disa.fso.rhel11:def:407

if grep -q "^[ \t\n\r]*install[ \t\n\r]+rds[ \t\n\r]+/bin/true" /etc/modprobe.conf; then
    echo "FAIL"
    exit 1
fi

for file in /etc/modprobe.d/*; do
    if [ -f "$file" ]; then
        if grep -q "^[ \t\n\r]*install[ \t\n\r]+rds[ \t\n\r]+/bin/true" "$file"; then
            echo "FAIL"
            exit 1
        fi
    fi
done

echo "PASS"
exit 0

Remediation

Prevent the RDS protocol handler for dynamic loading.
# echo "install rds /bin/true" >> /etc/modprobe.conf