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Network Security Focus-IDS
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Re: Re: how to avoid false positive in generic cross site scripting atta

from [rathnach] Network Security [Permanent Link]
Subject: Re: Re: how to avoid false positive in generic cross site scripting attack ids signature
Date: 6 Feb 2007 11:44:45 -0000 
1st is, whether executing javascript on clients browser context in http req. is 
permissible.


we don't have any control to implement policy to restrict developers 
using such feature.


 2nd as yahoo is one of the most visted sit, how can avoid cjances of false 
postive, and is there any way to harden this signature.

IDS detection is most effective only when it is configured properly and 
signatures are specific to attack.


Generic signatures are only good to identify unknown attacks,Provided you have 
good logging capability. but problem is false positives. 
My would suggest is to find some vulnerable file path + XXS pattern to be more 
effective.

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