What is a worm in the context of information security?

A worm is defined as a self-replicating software program that can spread from one computer to another without the need for human interaction. This characteristic allows worms to proliferate across networks rapidly, exploiting vulnerabilities in operating systems or applications to gain access and replicate themselves. Unlike viruses, which often attach themselves to legitimate files and require user action to spread, worms operate autonomously, enabling them to cause widespread damage and disruption in a short period.

Understanding the nature of a worm is crucial in the context of information security, as it emphasizes the importance of implementing robust network security measures to prevent unauthorized access and protect systems from automated attacks. Worms can consume bandwidth and take control of systems, leading to significant operational and financial repercussions for affected organizations.