computer science

Vulnerability assessment (computing)

Vulnerability assessment (computing) is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Vulnerability assessment (computing) rather than just read about it. In short: Vulnerability assessment is a process of defining, identifying and classifying the security holes in information technology systems. An attacker can exploit a vulnerability to violate the security of a system.

Key takeaways

Vulnerability assessment (computing) belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Vulnerability assessment (computing) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Vulnerability assessment (computing) from memory before moving on to harder problems.

Reference excerpt

Vulnerability assessment is a process of defining, identifying and classifying the security holes in information technology systems. An attacker can exploit a vulnerability to violate the security of a system. Some known vulnerabilities are Authentication Vulnerability, Authorization Vulnerability and Input Validation Vulnerability.

Purpose Before deploying a system, it first must go through from a series of vulnerability assessments that will ensure that the build system is secure from all the known security risks. When a new vulnerability is discovered, the system administrator can again perform an assessment, discover which modules are vulnerable, and start the patch process. After the fixes are in place, another assessment can be run to verify that the vulnerabilities were actually resolved. This cycle of assess, patch, and re-assess has become the standard method for many organizations to manage their security issues. The primary purpose of the assessment is to find the vulnerabilities in the system, but the assessment report conveys to stakeholders that the system is secured from these vulnerabilities. If an intruder gained access to a network consisting of vulnerable Web servers, it is safe to assume that he gained access to those systems as well. Because of assessment report, the security administrator will be able to determine how intrusion occurred, identify compromised assets and take appropriate security measures to prevent critical damage to the system.

Assessment types Depending on the system a vulnerability assessment can have many types and level.

Host assessment A host assessment looks for system-level vulnerabilities such as insecure file permissions, application level bugs, backdoor and Trojan horse installations. It requires specialized tools for the operating system and software packages being used, in addition to administrative access to each system that should be tested. Host assessment is often very costly in term of time, and thus is only used in the assessment of critical systems. Tools like COPS and Tiger are popular in host assessment.

Network assessment In a network assessment one assess the network for known vulnerabilities. It locates all systems on a network, determines what network services are in use, and then analyzes those services for potential vulnerabilities. This process does not require any configuration changes on the systems being assessed. Unlike host assessment, network assessment requires little computational cost and effort.

Vulnerability assessment vs penetration testing Vulnerability assessment and penetration testing are two different testing methods. They are differentiated on the basis of certain specific parameters.

References

External links Dowd; McDonald; Schuh (2007). The art of software security assessment : identifying and preventing software vulnerabilities (PDF). Indianapolis, Ind.: Addison-Wesley. ISBN 978-0-321-44442-4. OCLC 70836623. Archived from the original (PDF) on 2020-10-08. List of known Vulnerabilities

Worked examples

Example 1 — a first encounter with Vulnerability assessment (computing)

Start with the simplest possible case. Write down what Vulnerability assessment (computing) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Vulnerability assessment (computing) before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Vulnerability assessment (computing) ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Vulnerability assessment (computing)

In research: Vulnerability assessment (computing) appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Vulnerability assessment (computing) in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Vulnerability assessment (computing) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Computer security, Information technology, so understanding it makes those chapters shorter.
In everyday life: Look for Vulnerability assessment (computing) outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Vulnerability assessment (computing) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Vulnerability assessment (computing) means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Vulnerability assessment (computing) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Vulnerability assessment (computing) in simple terms?

Why does Vulnerability assessment (computing) matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Vulnerability assessment (computing)?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Vulnerability assessment (computing).