Vulnerability Assessment

A vulnerability is a defect in software or hardware, at least in the context of information security, and it is paired with an exploit as the means to exercise that vulnerability to some end. It is the important job of an organization’s security team to keep up to date with the latest security vulnerabilities that could threaten the network and information systems

The objective of a vulnerability assessment is to ensure that the network and the information systems are tested for security vulnerabilities in a consistent and repeatable manner. Security vulnerabilities will continue to be discovered in technology products and services. These vulnerabilities, regardless of whether they are caused by an unintentional software bug or by design (such as a default administrative password), can be used by malicious persons to compromise the confidentiality, availability, or integrity of your infrastructure.
Hardware and software vendors typically provide software fixes when they announce the vulnerabilities in their products. When there is no fix available, vendors typically provide a workaround or mitigation. There is usually a time period between the announcement of a security vulnerability in a particular technology and the availability of an attack method (an exploit). Within this time period, system administrators should take action to protect their systems against an attack because at this point the public knows that a flaw exists, but attackers are still trying to find a way to take advantage of that vulnerability. Unfortunately, the vulnerability-to-exploit time period has been steadily decreasing
Sometimes information about a previously undisclosed vulnerability emerges on the Internet before the vendor is notified and has time to take action. In these situations, the vulnerability-to-exploit time period is “reversed,” in that the attackers have a working exploit for a vulnerability that no one knew existed except the attackers themselves.
This situation is becoming far more common as vendors integrate open source and common third-party software packages. The result is that public information about vulnerabilities and exploits is often available before the vendor has a time to patch images or provide clear guidance to customers

With the large quantity of new vulnerabilities from numerous vendors, it can be overwhelming to track all the vulnerabilities. How can the security team analyze any single vulnerability and determine its relevance to the specific technology architecture? The solution is to have a good process to determine which ones are relevant to your organization.
Security professionals should frequently evaluate CVSS for the purposes of understanding specific vulnerability characteristics and severity. CVSS is an open framework for communicating the characteristics and severity of software vulnerabilities ( CVSS scoring helps security professionals prioritize the
specific vulnerabilities by vendor-defined severity, environment impact, and exploitability. Working with CVSS, the organization’s security policies, and vulnerability management procedures, the vulnerability response method can help clarify a course of action in a minimal amount of time

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