Several (tm) months back I did my talk on "From LOW to PWNED" at hashdays and BSides Atlanta.
The slides were published here and the video from hashdays is here, no video for BSides ATL.
I consistently violate presentation zen and I try to make my slides usable after the talk but I decided to do a few blog posts covering the topics I put in the talk anyway.
Post  Intro/The point of the talk (sorry no pics of msf or courier new font in this one):
I had several points (I think...maybe all the same point...whatever)
1. We tend to have an over reliance on vulnerability scanners to tell us everything that is vulnerable. To be honest I have been guilty of this myself. Most of us probably have a for a variety of reasons, time, experience, level of effort required/paid for, etc. This over reliance on scanners has lead to a "no highs" == "secure environment". Most of us know this is not *always* the case and the point of the talk was to show some examples were medium and low vulnerabilities have led to a further exploitation or impact that I would consider "high" or above. Whether you call them chained exploits, magic, or the natural evolution of taking multiple smaller vulnerabilities and turning them into a significant exploit or opportunity its becoming more normal/common to have to go this route.
2. Given the "no highs" == "secure environment" mentality some clients have been conditioned that anything that is not a high is not exploitable and therefore not a priority for fixing (sometimes ever). This of course is not the outcome most people would recommend. Nevertheless some people take that approach.
3. How many IDS/IPS signatures exist for low and medium vulns and how often do we ignore/disable those? Feedback welcome here.
4. Clients should pay attention to low/medium vulns as much as they do high+ vulns and in turn pentesters/VA people/security teams should also pay attention to low/medium vulns. Does that mean ever SSLv2 enabled should be full out emergency? Hell no, but *someone* needs to be able to vet that those low/medium findings cant be turned into something more.
5. Keep in a human in the mix. Tools/scanner are great for automating tasks but I don't think we are there yet with the technology of taking multiple less severe vulnerabilities and turning them into something significant. Bottom line, the scanner wont find all your ownable stuff, you need a person(s) to do this.