G L O S S A R Y
VI R U S
A program that infects other ones, by adding its code to them in order to gain control when infected files are run. This
simple definition allows identifying the main action performed by any virus: infection.
VU L N E R A B I L I T Y
A flaw in an operating system or an application that may be exploited by malware makers to penetrate the operating
system or application and corrupt its integrity. Presence of a large number of vulnerabilities in an operating system
makes it unreliable, because viruses that penetrate the operating system may cause disruptions in the operating system
itself and in installed applications.