How to Implement Network Risk Assessment in OMNeT++
To implement the Network Risk Assessment in OMNeT++, we have to assess the potential security risks inside the network by generating a simulation that helps to analyze weakness, threats and potential influence. Below, we offered the implementation of NRA in OMNeT++:
Step-by-Step Implementation:
- Define the Network Topology
Start by generating a simple network topology with the help of NED language in OMNeT++. For instance, let’s build a network that has multiple hosts, router and a server.
network RiskAssessmentNetwork
{
submodules:
router: Router {
@display(“p=300,150”);
}
server: StandardHost {
@display(“p=500,150”);
}
client1: StandardHost {
@display(“p=100,100”);
}
client2: StandardHost {
@display(“p=100,200”);
}
connections:
client1.ethg++ <–> Eth100M <–> router.ethg++;
client2.ethg++ <–> Eth100M <–> router.ethg++;
router.ethg++ <–> Eth100M <–> server.ethg++;
}
- Implement Vulnerability Assessment Modules
Cultivate a module that does a vulnerability assessment on every network component. This module will identify potential vulnerabilities like open ports, outdated software, or weak encryption.
// VulnerabilityAssessment.cc
#include <omnetpp.h>
#include “inet/applications/tcpapp/TcpAppBase.h”
using namespace omnetpp;
class VulnerabilityAssessment : public inet::TcpAppBase
{
protected:
virtual void initialize(int stage) override;
virtual void handleMessageWhenUp(cMessage *msg) override;
void performAssessment();
void evaluateHostRisk(int hostId, int port);
};
Define_Module(VulnerabilityAssessment);
void VulnerabilityAssessment::initialize(int stage)
{
TcpAppBase::initialize(stage);
if (stage == inet::INITSTAGE_APPLICATION_LAYER) {
performAssessment();
}
}
void VulnerabilityAssessment::performAssessment()
{
for (int hostId = 1; hostId <= 2; hostId++) {
// Simulate port scanning and vulnerability assessment
for (int port = 1; port <= 1024; port++) {
evaluateHostRisk(hostId, port);
}
}
}
void VulnerabilityAssessment::evaluateHostRisk(int hostId, int port)
{
// Simulate finding vulnerabilities on specific ports
if (port == 80 || port == 21) {
EV << “Host ” << hostId << ” has an open port: ” << port << endl;
EV << “Checking for vulnerabilities on host ” << hostId << ” at port ” << port << “…” << endl;
if (port == 80) {
EV << “Vulnerability found on Host ” << hostId << ” at port ” << port << “: Outdated HTTP Server (CVE-2023-XYZ)” << endl;
} else if (port == 21) {
EV << “Vulnerability found on Host ” << hostId << ” at port ” << port << “: Weak FTP Credentials (CVE-2023-ABC)” << endl;
}
}
}
- Implement Threat Assessment Modules
Simulate various attack vectors like DDoS attacks, malware, or unauthorized access to develop a module that examines potential threats.
// ThreatAssessment.cc
#include <omnetpp.h>
using namespace omnetpp;
class ThreatAssessment : public cSimpleModule
{
protected:
virtual void initialize() override;
void simulateAttack(int hostId);
double calculateThreatLikelihood(int hostId, int attackType);
};
Define_Module(ThreatAssessment);
void ThreatAssessment::initialize()
{
for (int hostId = 1; hostId <= 2; hostId++) {
simulateAttack(hostId);
}
}
void ThreatAssessment::simulateAttack(int hostId)
{
// Simulate an attack scenario, e.g., DDoS or Malware
int attackType = 1; // Example: 1 = DDoS, 2 = Malware
double likelihood = calculateThreatLikelihood(hostId, attackType);
EV << “Simulating attack on Host ” << hostId << ” with likelihood: ” << likelihood << endl;
if (likelihood > 0.7) {
EV << “High likelihood of successful attack on Host ” << hostId << endl;
}
}
double ThreatAssessment::calculateThreatLikelihood(int hostId, int attackType)
{
// Basic example: Likelihood based on host and attack type
return uniform(0, 1); // Random likelihood for simplicity
}
- Implement Risk Calculation Module
Estimate the inclusive risk for all network elements by concatenating the results of the vulnerability assessment and threat tests. It is calculated as a function of vulnerability severity, threat likelihood, and potential impact.
// RiskCalculation.cc
#include <omnetpp.h>
using namespace omnetpp;
class RiskCalculation : public cSimpleModule
{
protected:
virtual void initialize() override;
double calculateRisk(double vulnerabilitySeverity, double threatLikelihood, double impact);
};
Define_Module(RiskCalculation);
void RiskCalculation::initialize()
{
// Example of calculating risk for a host
double vulnerabilitySeverity = 0.8; // Assume high severity
double threatLikelihood = 0.7; // Assume moderate likelihood
double impact = 0.9; // Assume high impact
double risk = calculateRisk(vulnerabilitySeverity, threatLikelihood, impact);
EV << “Calculated risk: ” << risk << endl;
if (risk > 0.7) {
EV << “High risk detected, immediate action required!” << endl;
}
}
double RiskCalculation::calculateRisk(double vulnerabilitySeverity, double threatLikelihood, double impact)
{
return vulnerabilitySeverity * threatLikelihood * impact;
}
- Run the Simulation
Compile and run the simulation in OMNeT++. The simulation will implement the vulnerability evaluation, threat assessment, and risk estimation, offering insights into the overall security posture of the network.
- Analyze the Results
The results of the simulation will be displayed in the OMNeT++ log, displaying the detected vulnerabilities, threats, and calculated risk levels for each network component. We can prioritize security enhancement and mitigate high-risk issues by using this information.
- Extend the Simulation
You can optimize the risk assessment by:
- Adding more difficult threat situations.
- Integrating additional factors such as asset value, potential financial loss, or regulatory impact.
- Automating replies to high-risk findings like accelerating simulated patches or pattern changes.
This procedure successfully offered the valuable insights regarding the implementation of Risk Assessment in the network using OMNeT++ tool. it also helps you understand the functionalities used and how to evaluate the risk in the network.
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