Is Vulnerability Management Broken?

Some argue that it is time to rethink the vulnerability management hamster wheel

If the definition of insanity is doing the same thing over and over and expecting different results, then are todays IT security departments just a little nutty about vulnerability management? Some security experts think so, claiming that the vulnerability management process is flawed at most organizations today.
Its what we call the security insanity cycle, says Anup Ghosh, founder and CEO of Invincea, which is that cycle of scan your network, patch your vulnerabilities, detect the intrusions, and wash, rinse, and repeat. We keep doing it thinking that somehow this is going to get better, and it doesnt. Vulnerability management as a strategy isnt working -- that method is fundamentally flawed.
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When most organizations employ vulnerability scanners, the problem is that the scanning itself doesnt necessarily help manage the problem, says Brian Laing, director of U.S. marketing and products for AhnLab, and a long-time figure in the vulnerability management world during stints at ISS and Red Seal Networks. Todays vulnerability numbers are so huge that they make it difficult to relate the knowledge of these problems with actionable work that mitigates the risk around them, he says.
Ive been trying to get that industry to change to a patch view for years, Laing says. Dont tell me I have 5 million vulnerabilities. Tell me I have to install 1,000 patches. That I can budget for.
But even with a perfect patching and change management routine in place, organizations with enough intellectual property or financial plumbing in place to entice motivated attackers are proving soft targets for targeted attacks.
If theyre targeting you with a piece of malware, theyre going to be taking a very structured approach. Theyre going to come at you with a vulnerability thats not known, Laing says.
One of the application ecosystems that plays out the insanity cycle Ghosh laments is that of Java, which has suffered a seemingly constant volley of zero-day announcements that enterprises cant keep up with on the patch side or through pre-emptive uninstalls.
You cannot uninstall Java because of the number of enterprise apps that use it, he says. Then its why not just patch Java? Well, thats what everyones trying to do, but every week theres a new exploit for the latest version of Java. You cant stay on top of it.
The way things are trending should be enough to turn security philosophy on its head, he says. The problem is deciding where to turn.
A lot of people are saying, Hey, stop focusing on vulnerabilities because youll never get your arms all the way around it. Instead, focus on the threats. Unfortunately, thats where the dialogue stops, says Ghosh, who believes that the threat-centric approach will require architectural creativity.
His firm relies on the containerized approach of application sandboxing, which relies on the same type of internal barriers and chamber doors within the client that make network segmentation such a good idea on the network side.
So you click on a link and that link happens to infect that application; theyre constrained in a container so they cant move outside of that environment to infect the rest of the host and then the network, he says. Thats a different approach to trying to patch everything -- taking an architectural approach to the problem.
Of course, some security experts warn that sandboxing shouldnt be seen as a panacea for the vulnerability management churn. Thats because as hackers start tinkering and finding weaknesses in the way the user can escape that virtualized container, those barriers could start to vanish.
Bottom line: The market success of any sandboxing effort will always revolve around how permissions to escape the sandbox are managed, says David Hess, founder of Data Bakery.
That is why Laing still believes a sane patch management cycle does make sense, in concert with a better examination of the threat behavior itself. Behavioral analysis is hardly a new idea, but the methods have room to further evolve. He believes that it might be helpful for security vendors to start thinking of malware a bit like illegal substances. As he explains, when the government first banned certain drugs, like marijuana, it banned a specific chemical compound. But in the case of acid, which could vary wildly in chemical makeup, the ban was on a class of substances that achieved a certain mental state.
You dont know what it is youre going to look for, so you have to look for the state that it puts the system in rather than just whether its a specific set of malware, he says. Look at what it is doing overall. Did it open up the registry? Well, that by itself isnt so bad. Did it write to the registry? That by itself isnt necessarily bad either. Did it write to the run-once registry key? Thats bad. String together not just the one behavior, but look at multiple behaviors together.
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