Vulnerability Management

March 23, 2023 by
Mark Nash

Technology vulnerabilities are an unfortunate side effect of innovation. When software companies push new updates, the code often has weaknesses. Hackers exploit these; then, the developers address the vulnerabilities with a security patch. The cycle continues with each new software or hardware update. It's estimated that about 93% of corporate networks are susceptible to being breached by a hacker. Assessing and managing these network weaknesses isn't always a priority for organizations, leading to many organizations suffering breaches because of poor vulnerability management. 61% of security vulnerabilities in corporate networks are over five years old. Many types of attacks take advantage of unpatched vulnerabilities in software code. This includes ransomware attacks, account takeover, and other common cyberattacks. Whenever you see the term "exploit" when reading about a data breach, that's an exploit of a vulnerability. Hackers write malicious code to take advantage of these "loopholes." That code can allow them to elevate privileges, run system commands, or perform other dangerous network intrusions. Putting together an effective vulnerability management process can reduce your risk. It doesn't have to be complicated either; just follow the steps outlined below to get started.

Vulnerability Management Process

Step 1: Identify Your Assets

First, you need to identify all the devices and software you will need to assess. You'll want to include all devices that connect to your network, including:

  • Computers
  • Smartphones
  • Tablets
  • IoT devices
  • Servers
  • Cloud services

Vulnerabilities can appear in many places, such as the code for an operating system, a cloud platform, software, or firmware. So, you'll want a complete inventory of all systems and endpoints in your network. This is an essential first step, so you will know what you need to include in the scope of your assessment.

Step 2: Perform a Vulnerability Assessment

Next will be performing a vulnerability assessment. This is usually done by an IT professional using assessment software. This could also include penetration testing. During the assessment, the professional scans your systems for any known vulnerabilities. The assessment tool matches found software versions against vulnerability databases. For example, a database may note that a version of Microsoft Exchange has a vulnerability. If it detects that you have a server running that same version, it will report it as a found weakness in your security.

Step 3: Prioritize Vulnerabilities by Threat Level

The assessment results provide a roadmap for mitigating network vulnerabilities. There will usually be several, and not all are as severe as others. You will next need to rank which ones to address first. At the top of the list should be those experts consider severe. Many vulnerability assessment tools use the Common Vulnerability Scoring System (CVSS). This categorizes vulnerabilities with a rating score from low to critical severity. You'll also want to rank vulnerabilities by your own business needs. If a software is only used occasionally and only on one device, it's probably a lower priority to address (but you should still address it). On the other hand, a vulnerability in software used on all employee devices is probably a high priority.

Step 4: Remediate Vulnerabilities

The next step is to remediate vulnerabilities according to the prioritized list. Remediation often means applying an issued update or security patch, but it may also mean upgrading the hardware that may be too old for you to update. Another form of remediation may be ringfencing, which is when you "wall off" an application or device from others in the network. A company may do this if a scan turns up a vulnerability for which a patch does not yet exist. Increasing advanced threat protection settings in your network can also help. Once you've remediated the weaknesses, you should confirm the fixes.

Step 5: Document Activities

It's important to document the vulnerability assessment and management process. This is vital both for cybersecurity needs and compliance.

You'll want to document when you performed the last vulnerability assessment and all the steps taken to remediate each vulnerability. Keeping these logs will be vital in the case of a future breach. They also can inform the next vulnerability assessment.

Step 6: Schedule Your Next Vulnerability Assessment Scan

Once you go through a round of vulnerability assessment and mitigation, you're not done. Vulnerability management is an ongoing process. In 2022, there were over 22,500 new vulnerabilities documented. Developers continue to update their software continuously, and each of those updates can introduce new vulnerabilities into your network. It's a best practice to have a schedule for regular vulnerability assessments. The cycle of assessment, prioritization, mitigation, and documentation should be ongoing. This fortifies your network against cyberattacks. It removes one of the main enablers of hackers.