Re: When to do something about detected attacks (was Re: how to do...)

From: tqbfat_private
Date: Wed Apr 15 1998 - 22:15:31 PDT

  • Next message: Anonymous: "High ranking lusers"

    > One of my biggest criticisms of IDS's, security scanners, and security
    > programs in general is that they look for security problems, rather than
    > gathering information and process it with a security mindset.  The
    
    I think this is a poor generalization. Security scanners don't necessarily
    "look for holes instead of valuable configuration information"; they tend
    to look for both. The problem here is that you can't always (or even
    usually) analyze general configuration information and accurately obtain a
    picture of which vulnerabilities are present. 
    
    You can collect "general" information such as the network topology,
    operating systems of all the machines, and the services they run, and
    "process it from a security mindset" to say "suchandsuch a machine is
    probably vulnerable to this problem". The information you obtain from this
    type of analysis is probably going to be inaccurate. The need for accurate
    results is what drives tools like misuse detectors and security scanners
    to look for known patterns of abuse or vulnerability (respectively).
    
    A valid criticism (and this may be the criticism you are making) against
    these types of systems is that they don't do enough analysis of the
    information they obtain and don't report the general information (rather
    than the specific low-level vulnerabilities) well enough. This is
    different from the question of whether the information is collected at
    all, though.
    
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    Thomas H. Ptacek			     		Secure Networks, Inc.
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    http://www.enteract.com/~tqbf				"mmm... sacrilicious"
    



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