Network security assessments evaluate the security posture of an organization's network infrastructure by identifying network vulnerabilities, eliminating weaknesses, and reducing potential threats.
What is a Network Security Risk Assessment?
A network security assessment is an audit designed to find security vulnerabilities that are at risk of being exploited, could cause harm to business operations, or could exposesensitiveinformation.
What is the Purpose of a Network Assessment?
The purpose of a network security assessment is to keep your network, devices, and sensitive data secured from unauthorized access by discovering potentialattack vectorsfrom inside and outside of your internal network.
Additionally, you may have a regulatory responsibility to do them, depending on your industry. For example, credit card processors need to comply with PCI DSS and health care organizations need to comply with HIPAA.
Network security assessments can answer questions like:
- What systems are likely to be breached?
- What are the common entry points for security breaches
- What would the impact of acyber attackbe on a specific asset?
- Whatsensitivedata,personally identifiable informationorprotected health informationwould be exposed in adata breachordata leak?
- What can we do to mitigate this type of attack?
What are the Types of Network Risk Assessments?
There are two types of network security assessments:
- Vulnerability assessment:A vulnerability assessment shows organizations where their weaknesses are.Read more about vulnerabilities hereandvulnerability management here.
- Penetration test:Penetration testingis designed to mimic an actualcyber attackorsocial engineering attacksuch asphishing,spear phishingorwhaling.
Both are great methods to test the effectiveness of yournetwork securitydefenses and measure the potential impact of an attack on specific assets.
How to Conduct a Network Security Risk Assessment
A network security assessment is just another type ofcybersecurity risk assessment. The process is as follows:
- Take inventory of your resources
- Determine information value
- Assess the vulnerability of your IT infrastructure
- Test your defenses
- Document results in a network security assessment report
- Implement security controls to improve cybersecurity
- Continuously monitor for issues and changes
Take Inventory of Resources
The first step is to identify assets to evaluate and determine the scope of the assessment. This will allow you to prioritize which assets to assess first. You may not want or need to perform an assessment on every wireless network, web application, and Wi-Fi access point. And you might not have the budget even if you wanted to.
That said, it can help to take stock of all your networks, devices, data, and other assets so you can determine which assets you wish to secure. This process will provide you with an overview of your overall network and the IT security controls around it.
Determine Information Value
Most organizations don't have an unlimited budget for information security (InfoSec), so it's best to limit your scope to the most business-critical assets. Additionally, you should think about what regulatory and compliance requirements your organization may need to comply with.
Read our guide on compliance monitoring best practices for more information.
To save time and money, spend time developing a data classification policy that defines a standard way to determine the value of an asset or piece of data.See our guide on data classification for more information.
Most organizations will include asset value, legal standing, and business importance. Once the policy has been formally incorporated into yourinformation risk management program, use it to classify each asset as critical, major, or minor.
Other questions that may help you determine value include:
- Are there financial or legal penalties associated with exposing or losing this information?
- How valuable is this information to a competitor?
- Could we recreate this information from scratch? How long would it take and what would be the associated costs?
- Would losing this information have an impact on revenue or profitability?
- Would losing this data impact day-to-day business operations? Could our staff work without it?
- What would be the reputational damage of thisdata being leaked?
Assess the Vulnerability of Your IT Infrastructure
Vulnerabilities are anything that can be exploited in an otherwise secure network.
Cybersecurity risk can come from anywhere including inside and outside your organization, internal personnel with poor security habits, orthird-party vendorswith inadequateinformation security policieswho have access to your network.
Because risks can be so varied, a robust security risk assessment process should include:
- Network scanning:A comprehensive scan of all your network's ports andother attack vectors.Read more about the dangers of open ports here. This should include Wi-Fi, Internet of Things (IoT) and other wireless networks and will identify accessible hosts and network services (such as HTTP, FTP, SMTP, and POP-3).
- Internal weaknesses:Many organizations will opt to hire outside security consultants to test both personnel and security consultants from the outside.
- Network enumeration:The discovery of hosts or devices on a network that can fingerprint the operating system of remote hosts. Once an attacker knows the operating system, they can checkCVEfor a list of knownvulnerabilitiesto exploit.
- Third-party review:A review of all third-parties and their level of access to your internal network andsensitive assets.
- Information securitypolicy review:Review of policies around employee training, BYOD (bring your own devices), and email usage.
Other threats you should consider too:
- Natural disasters: Floods, hurricanes, earthquakes, lightning, and fire can destroy as much as any cyber attacker. You can not only lose data but servers too. When deciding between on-premise and cloud-based servers, think about the chance of natural disasters.
- System failure: Are your most critical systems running on high-quality equipment? Do they have good support?
- Human error: Are yourS3 buckets holding sensitive information properly configured? Does your organization have proper education around malware,phishing, andsocial engineering? Anyone can accidentally click a malware link or enter their credentials into a phishing scam. You need to have strong ITsecurity controls including regular data backups, password managers, etc.
- Adversarial threats:third party vendors, insiders, trusted insiders, privileged insiders, established hacker collectives, ad hoc groups,corporate espionage, suppliers, nation-states
As this can be time-intensive, many organizations opt for outside assessment services orautomated security solutions.
Test your Defense
Once you've assessed your organization's vulnerabilities, you want to test whether your security controls and risk mitigation techniques prevent attackers from being able to exploit them.
This could be done via manual penetration testing or using automatedethical hackingtools likeMetasploit or Nmap.
Document Results in a Network Risk Assessment Report
Now you need to develop a report to support management's decision-making on budget, policies, and procedures. For each vulnerability, the report should describe its risk, exploits, and value. Along with the impact and likelihood of occurrence and control recommendations.
As you work through this process, you'll understand what infrastructure your company operates, what your most valuable data is, and how you can better operate and secure your business.
Implement Security Controls to Improve Cybersecurity
Chances are you have found a gap or weak spot in your network. Make a list of them and develop a plan to remediate them.
Controls can be implemented through technical means, such as hardware or software,encryption,network intrusion detection mechanisms, two-factor authentication, automatic updates,continuous data leak detection, or through non-technical means like security policies, and physical mechanisms like locks orbiometric access.
Additionally, classify controls into preventative and detective measures. Preventative controls are designed to stop attacks from happening, e.g.continuous vendor security monitoring, while detective controls try to discover when an attack has occurred.
Continuously Monitor for Issues and Changes
In addition to manual network security assessments. Many organizations are investing insecurity ratingsto provide continuous monitoring of not only their network security but their overallsecurity posturetoo.
Security ratings are also commonly used ina Third-Party Risk Management frameworkto assist with tracking vendor security posture changes.
Security ratings or cybersecurity ratings are a data-driven, objective, and dynamic measurement of an organization'ssecurity posture. They are created by atrusted, independent security rating platformmaking them valuable as an objective indicator of an organization'scybersecurity performance.
Security ratings complement traditional risk management methods by providing continuous, objective, actionable, and always up-to-date data.
Read more about security ratings here.
Recap of the Network Security Risk Assessment Process
Remember, the process for conducting a network assessment is similar to the process for conducting any cybersecurity risk assessment. Start by taking inventory of your resources and determining information value. Next, assess the vulnerability of your IT infrastructure and test your defenses. Then, document your results, implement security advancements, and, finally, continuously monitor your network for new issues.
