Latest data indicates that: 1 in every 204 email messages contains a virus, and that 99 percent of viruses enter companies via SMTP mail or HTTP web browsing.
And its not just viruses that cause problems. In January 2003, for example, the SQL Slammer worm hit thousands of servers around the world, exploiting a buffer overflow vulnerability and causing denial of services in SQL servers, resulting in losses estimated, according to Computer Economics , at 705 million euros.
What's more, employee productivity is being increasingly degraded not only due to the time they spend classifying and eliminating the large number of spam messages that reach their inboxes, but also due to the time they spend accessing inappropriate or even illegal web content, which, if distributed, can damage the corporate image.
Over the last few years, viruses have significantly changed their propagation strategy. Whereas viruses used to spread through floppy disks and extractable support mediums, nowadays, the most common means of propagation used by viruses and other malware is the Internet.
Similarly, viruses that enter via the Internet are, statistically speaking, the fastest and most dangerous, often with multiple propagation and infection methods, such as so-called 'blended threats'. This makes it essential to install protection in gateways , as most viruses enter via email or Internet downloads. |