Let me preface this with, I am not claiming to be an expert, nor have i used said tool I am to mention.
However, let me ask you a question in return before I dive in? Have you used IDA pro, or any debugger for manual analysis? I know you are hoping not to do such, and are looking for an automated method, I am just curious to the skill base in which you are dealing.
Now, with that said. A brief google search reveals that there is a collection of scripts for IDA pro that will do somewhat similar to what you are hoping, in that you perform automated binary analysis for vulnerabilities or misuse of functions in programs that would allow you to exploit them.
BugScam is a collection of scripts for the commercial debugger IDA Pro (http://www.datarescue.com) that will scan a given binary for problematic uses of certain library functions (e.g. strcpy etc) and generate a nice output file (HTML so far, LaTeX soon).
Lacking reviews on sourceforge, as i stated in the premise, i cannot guarantee the quality. But maybe this will get you moving in the right direction.
I will continue research your issue, and post back with further information and options if i happen to discover them. Hope this helps at least a little on your venture.