Re: [fw-wiz] SANS Top Ten and Commercial Firewalls

From: arkat_private
Date: Fri Oct 04 2002 - 07:21:32 PDT

  • Next message: Paul D. Robertson: "Re: [fw-wiz] SANS Top Ten and Commercial Firewalls"

    There are some "reasonable" length limitations, like limiting maximal
    http header size. 
    
    As far as i remember, though, most cases of exploits that were
    unable to sneak through were some m$-specific url encoding abuses that are
    just unsupported by proxy.
    
    On Fri, Oct 04, 2002 at 10:26:38AM -0400, Paul D. Robertson wrote:
    > On Fri, 4 Oct 2002 arkat_private wrote:
    > 
    > > Sometimes. It is often prevented _before_ vulnerability is known if 
    > > the exploit breaks http protocol, otherwise you can block it with regexp.
    > 
    > Every time I've looked at the protocol spec, it's been a sieve- there 
    > aren't length definitions in most of the specification.  Could you provide 
    > some examples of things which break the protocol please?
    > 
    > Paul
    > -----------------------------------------------------------------------------
    > Paul D. Robertson      "My statements in this message are personal opinions
    > probertsat_private      which may have no basis whatsoever in fact."
    > probertsonat_private Director of Risk Assessment TruSecure Corporation
    
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