full-disclosure - Vulnerability Disclosure Technics

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From: Oliver at greyhat.de (Oliver@...yhat.de)
Subject: Vulnerability Disclosure Technics

There are several ways to search for vulnerabilities in applications.
If you have the sourcecode, you can do a code review. There are many 
tools (like flawfinder etc.) wich will support you in finding "static" 
vulnerabilities like
buffer-overflows du to incorrect usage of commands like "strcpy" and family.
If you dont have the source code, you can do a reverse engineering with 
debuggers, dissassemblers and other tools, to search for common
coding mistakes.
You also can do a black-box testing, whereby you can use 
fuzzy-technologie to generate random parameters and requests, sending to 
the application.
The last one is the one i often use, because in most cases you dont have 
the source code, and reverse engineering is not that easy :)

bye,

Oliver

Mr. John wrote:

>Hi
>A question is in my mind everywhen I see a
>vulnerability disclosure. I want to know how a person
>finds a security vulnerability in a software. Is there
>a regular way?
>Suppose that I am technical chair of a software group
>and   we have a software that security consideration
>is important for us. How can I test our software to
>ensure that no security vulnerabilities (like buffer
>overflow vuln) exists in our software product. Or it
>is question for me how for example eEye find many
>vulnerabilities in software products. Is there a
>regular and formal way? Is there some tools, technics,
>method, ... for this purpose, for finding a
>vulnerability in a software?
>
>Thanks
>John
>
>
>
>		
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