Due to a timing discrepency during the authentication phase, it is possible for a remote attacker to determine whether or not a username exists on the target machine. Though not a vulnerability in and of itself, this information is crucial in mounting more sophisticated attacks.
With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.
– Scott Cheney, Manager of Information Security, Sierra View Medical Center