When it comes to cybersecurity, “penetration testing vs vulnerability scanning” is a debate that often trips business leaders. These two practices are crucial for identifying and mitigating potential vulnerabilities, but they differ significantly in their approaches and outcomes. This article will provide a clear comparison, demystifying the distinct roles of penetration testing and vulnerability scanning in an organisation’s overall security strategy. By the end, you’ll have a solid grasp of when and how to leverage each practice effectively, empowering you to make informed decisions that fortify your business against the ever-evolving landscape of cyber threats.
🎯TL;DR
Penetration testing is a comprehensive, real-world simulation of cyber attacks conducted by skilled ethical hackers to actively exploit vulnerabilities, while vulnerability scanning is an automated process that identifies potential vulnerabilities without actively exploiting them.
You can also watch the condensed version of this article discussing the topic of penetration test vs vulnerability scan here:
Now, let’s see the difference between vulnerability scanning and penetration testing in more detail in the table below.
Penetration Testing Vs Vulnerability Scanning: A detailed comparison
Aspect | Penetration Testing | Vulnerability Scanning |
Purpose | Simulates real-world attacks to identify and exploit vulnerabilities in systems, networks, and applications. | Identifies and reports known vulnerabilities in systems, networks, and applications. |
Scope | Comprehensive, covering the entire attack surface. | Typically focused on specific systems or components. |
Provider accreditation | CREST penetration testing providers go through rigorous checks and ensure higher quality services | No accreditations are necessary, and even IT support providers offer this service at a fraction of the pen test cost |
Approach | Manual, conducted by skilled ethical hackers (penetration testers). | Automated, using vulnerability scanning tools. |
Depth | In-depth analysis, attempting to gain unauthorized access and escalate privileges. | Surface-level analysis, identifies potential vulnerabilities and doesn’t include exploitation and post-exploitation process. |
Reporting | Detailed reports with step-by-step exploitation procedures and remediation recommendations. | Report listing identified vulnerabilities with severity ratings and possible mitigation strategies. |
Risk | Controlled and authorized simulated attacks, but carry a higher risk of causing unintended system disruptions if a detailed scope is not communicated or agreed upon beforehand. | Low risk, as it does not actively exploit vulnerabilities. |
Compliance | Often required by regulations for sensitive data or critical infrastructure or companies looking for cyber assurance for their solutions before going to market. | Commonly used as part of regular scanning and compliance efforts. |
Frequency | Typically performed periodically (e.g., annually or quarterly) due to its resource-intensive nature. | Can be performed more frequently (e.g., monthly or weekly) as part of ongoing security monitoring. |
Cost | Generally more expensive due to the expertise and manual effort. | More cost-effective, as vulnerability scanning tools are widely available and automated. |
Intrigued to learn more about each of these methods? We too. So, here’s a quick walkthrough.
What is penetration testing?
Penetration testing, also known as pen testing, is a simulated cyber attack conducted by ethical hackers to identify and exploit vulnerabilities in an organisation’s systems, networks, and applications.
What is vulnerability scanning?
Vulnerability scanning is an automated process that uses specialized tools to identify known vulnerabilities in an organisation’s systems, networks, and applications. Unlike penetration testing, which actively attempts to exploit vulnerabilities, vulnerability scanning simply reports on potential weaknesses without actively compromising the targeted systems.
What does a vulnerability scan do?
A vulnerability scan identifies and reports security vulnerabilities (in terms of high risk, medium risk, and low risk) using vulnerability scanner software.
Vulnerability scan vs Vulnerability Assessment
Don’t make the mistake of buying a vulnerability scan disguised as a vulnerability assessment. The vulnerability assessment process aims to perform vulnerability scans and provide a list of vulnerabilities affecting your network, with security expertise in removing false positives and explaining the attack impacts and likelihood of exploitation. This accuracy makes it a practical risk assessment for a business when fed into the risk remediation process.
How many types of vulnerability assessment are there?
Vulnerability assessments are of three types, and these may take anywhere from several minutes to several hours based on the scope size. These are internal, external, and host scans that identify potential vulnerabilities in the respective threat scenarios.
- Internal scans aim to identify vulnerabilities within an organisation’s internal network. It could be a cloud network, network segment, a corporate network, or the entire organisation consisting of multiple networks (production, staging, corporate).
- External scans include the scope of internet-facing components that may include email, web applications, firewalls, applications/portals and websites.
- Host scans include vulnerability assessment aimed at a single or multiple hosts that serve as a database, web server, server, workstation or another function.
Penetration Testing Vs Vulnerability Scanning: What to choose?
Key consideration to decide which one to choose depend upon a combination of the three factors, i.e. business criticality, budget, and expertise. These are explained below:
- Business Criticality: Prioritise penetration testing for your most critical assets and systems to ensure thorough coverage of security weaknesses.
- Budget: Balance your security needs with your available budget.
- Expertise: Choose reputable providers with experienced penetration testers and vulnerability analysts.
Here’s when organisations should choose penetration testing or vulnerability scanning based on their specific needs and goals:
Choose Penetration Testing when:
- A comprehensive security assessment is required: If your organisation needs an in-depth evaluation of its overall security posture, including identifying hidden vulnerabilities and testing the effectiveness of existing security controls, penetration testing is the way to go.
- Compliance and regulatory requirements mandate it: Many industries and regulatory bodies, such as those handling sensitive data or critical infrastructure, require periodic penetration testing as part of their compliance obligations.
- A proactive security approach is needed: If your organisation wants to take a proactive stance against cyber threats by simulating real-world attack scenarios and actively exploiting vulnerabilities before malicious actors do, penetration testing is the ideal choice.
Choose Vulnerability Scanning when:
- Regular security monitoring is needed: If your organisation needs to regularly monitor its systems and applications for known vulnerabilities as part of its ongoing security efforts, vulnerability scanning provides a cost-effective and efficient solution.
- Limited resources or budgets: Vulnerability scanning tools are generally more affordable and require fewer specialized resources compared to comprehensive penetration testing engagements.
- Complementing penetration testing: Vulnerability scanning can be used in conjunction with periodic penetration testing to provide continuous monitoring and identify potential vulnerabilities between testing cycles.
It’s important to note that these two practices are not mutually exclusive. In fact, many organisations adopt a hybrid approach, utilizing vulnerability scanning for regular security monitoring and complementing it with periodic penetration testing to achieve a comprehensive and proactive cybersecurity strategy.
By understanding the strengths and limitations of each method, business leaders can make informed decisions on when to employ penetration testing, vulnerability scanning, or a combination of both, to effectively safeguard their organisations against ever-evolving cyber threats.
Why is a penetration test considered to be more thorough than a vulnerability scan? Penetration test vs vulnerability scan
A penetration test goes one step further than a vulnerability scan by analysing and exploiting vulnerabilities to demonstrate the extent of an attack as an attacker. It also includes exploiting other systems within the assessment scope using lateral movements and pivoting into restricted systems infiltrating across the networks, compromising the entire estate.
Is vulnerability assessment part of a penetration test?
Yes. Vulnerability assessment identifies known security vulnerabilities in the systems. A penetration test is an extension of vulnerability scans where known vulnerabilities are exploited in a controller manner to demonstrate the degree to which a threat actor can gain unauthorised access to data.
Is penetration testing part of vulnerability management?
Yes, a vulnerability management program includes the identification and remediation of known vulnerabilities affecting an environment. Penetration testing within a vulnerability management program is conducted to validate that security issues have been addressed and the environment is safe from any known threats.
Security Compliance
Regulatory requirements and data security standards mandate the importance of conducting regular vulnerability scanning and penetration testing.
CIS Control 3 includes critical control ‘Continuous vulnerability management’ to identify, remediate and minimise the window of opportunity for attackers. ISO 27001 penetration tests, GDPR Pen test and PCI DSS penetration tests are often performed once a year to help
Regular assessments are required as critical controls mandated by PCI DSS to protect CDE systems and data. PCI DSS (Payment Card Industry Data Security Standard) state the penetration testing requirements as:
- PCI Requirement 6.6 states protecting internet-facing applications from new threats and vulnerabilities on an ongoing basis.
- PCI Requirement 11 outlines ‘regularly test security systems and processes’.
Conclusion: Vulnerability scan vs penetration test
While you have read about the differences between pen testing and vulnerability scanning, both forms of assessments are essential to improve an organisation’s security posture. Vulnerability assessments and penetration testing are used within the same environment in different formats and scopes to add value to the vulnerability management program. For instance, vulnerability assessments may be a better choice while scanning the mass networks and applications to identify common vulnerabilities at scale. It saves cost and time by not utilising penetration testing that is costly and time-intensive.
Third-party penetration testing is the best approach while considering internal environments such as corporate networks, active directory environments to be aware of the unknown risks and plan a security roadmap for internal hygiene. It helps to know the severity of risks affecting your environment from inside and outside (internet facing).
Get in touch to discuss your primary security concerns or third-party security validation requirements. We offer a free consultation to help you make informed choices about your environment while providing flexibility and transparency around deliverables, costs, and time frames.
