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Early Alerting - The Key To Proactive Security Print E-mail
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Source: - Posted by David Isecke   
Intrusion Detection Defending against today and tomorrow's numerous and rapidly moving security threats requires new, proactive technologies. Maintaining the status quo is no longer an option. By providing early warning of cyber attacks, and countermeasures to prevent attacks before they occur, early warning systems are destined to play a key role in ensuring that enterprises and the government stay ahead of those threats. . . . The security challenges facing today's enterprise networks are intensifying -- both in frequency and number. The Blaster worm arrived just 26 days after Microsoft disclosed an RPC DCOM Windows flaw and released a patch for vulnerable systems. The worm took advantage of what some security experts have called the most widespread Windows flaw ever. For a time, Blaster was infecting as many as 2,500 computers per hour.

One thing is becoming unmistakably clear: Time is no longer on our side. As an indication of just how much the environment has changed, consider that the far-reaching Nimda and Slammer worms had vulnerability threat windows of many months, leaving plenty of time for the vendor of the vulnerable software to create a patch and warn the public, reducing potential threat damage. A study conducted by Qualys and released in July, that correlated nearly 1.5 million scans over the course of a year and a half found that 80 percent of exploits are released within 60 days of a vulnerability's announcement. Security specialists often speak of the "vulnerability threat window," or the time between the discovery of a vulnerability and an exploit of that vulnerability by a specific threat. Blaster, as we have seen, arrived just weeks after Microsoft announced the RPC DCOM vulnerability, leaving little time for administrators to secure their networks.

I've observed that today's attacks are not only becoming more frequent, they are also becoming more complex, including polymorphic viruses, mass mailers, denial of service (DoS), and blended threats. Moreover, as enterprises continue to adopt new technologies (such as wireless and peer-to-peer networks, instant messaging, and broadband, to name just a few) and conduct more and more critical business functions online, they offer even more targets to attackers.

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