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What is an IT Security Vulnerability?

How to determine a vulnerability locally or remote.
Which services and software can be vulnerable and easy to exploit for remote attackers.
A vulnerability can be found in the most popular operating systems,firewalls, router and embedded devices.
Vulnerabilities arise due to the complex nature of programming and the high amount of human errors due to complexity.
Attackers that read the source code can find weaknesses to exploit.
Once an attacker is exploiting a vulnerability it can lead to a full system compromise, loss of sensitive information, DoS Denial of Service attacks.
It is crucial to audit your systems for any vulnerabilities.
Security holes/bugs are faults, defects, or programming errors. These may be exploited by unauthorized users to access computer networks or web servers from the Internet. As these vulnerabilities become known, software publishers develop "patches", "fixes" or "updates" that you can download to fix the problems.

Programming Bug 

In the security community, the word "vulnerability" describes a problem (such as a programming bug or common configuration error) that allows a system to be attacked or broken into. Indeed, finding vulnerabilities is a big part of the hacker/information security culture.
Searching for vulnerabilities is a way of proving that you are "elite". This subculture is similar to the scientific community. For example, there are a number of people (usually commercial companies) that are "research whores"; they take existing research and add their own small contribution, but then publish the result in such a way that leads people to believe that they are responsible for all the research leading up to that discovery.

Vulnerability Exploit

Words like "exploit" and "vulnerability" are tightly bound together. Often, a script/program will exploit a specific vulnerability. Since most vulnerabilities are exploited by script kiddies, the vulnerability is often known by the name of the most popular script that exploits it. In any case, there are broad-spectrum vulnerability scanners/assessment tools that will scan a system and look for common vulnerabilities. These are often used in order to toughen up a computer system.
In computer security, the term vulnerability is applied to a weakness in a system that allows an attacker to violate the integrity of that system. Vulnerabilities may result from weak passwords, software bugs, a computer virus or a script code injection, and a SQL injection.

Constructs in Programming

A security hole may exist only in theory, or may have a known instance of an exploit. Constructs in programming languages that are difficult to use properly can be a large source of vulnerabilities.
SecPoint® Protector UTM appliance secure your servers with many security holes and vulnerabilities from Internet attacks.
SecPoint® Penetrator Vulnerability scanning vulnerability finder allows the customers to analyze their network for vulnerabilities and weaknesses.
 Vulnerability Scanner - Vulnerability Management 


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