Re: Ok, Ok - I know - http_inspect

[Snortty <cwcwcwg () yahoo com>]

All, 

I have set up to enable inspect_uri_only:

preprocessor http_inspect_server: server default \
    profile all ports { 80 8080 8180 }
oversize_dir_length 500 inspect_uri_only

and when I run snort, it did show: 

Only inspect URI: YES

but I still have hundreds of http_inspect alerts in
short period of time, like the kinds:

[**] [119:15:1] (http_inspect) OVERSIZE REQUEST-URI
DIRECTORY [**]
[**] [119:13:1] (http_inspect) NON-RFC HTTP DELIMITER
[**]
[**] [119:16:1] (http_inspect) OVERSIZE CHUNK ENCODING
[**]
[**] [119:4:1] (http_inspect) BARE BYTE UNICODE
ENCODING [**]
[**] [119:12:1] (http_inspect) APACHE WHITESPACE (TAB)
[**]
[**] [119:2:1] (http_inspect) DOUBLE DECODING ATTACK
[**]

Can someone shed some lights on it please?

Thanks
Sw. 






--- sekure <sekure () gmail com> wrote:
> You are missing a slash after your unicode
> statement. 
> All http_inspect config options want to be part of
> the same line, the
> \ escapes the carriage return.  Try this:
>
> preprocessor http_inspect: global \
>    iis_unicode_map unicode.map 1252 \  <--- Notice
> that slash
>    inspect_uri_only
>
>
>
> On Thu, 17 Jun 2004 12:00:52 -0700 (PDT), Snortty
> <cwcwcwg () yahoo com> wrote:
> > It's true that one can not specify a subnet, but
> singe
> > IP or global.
> >
> > But, I want to use inspect_uri_only enabled for
> ALL
> > http_inspect alerts, can only make it work if I
> enter
> > an IP address to replace default sever 1.1.1.1.
> >
> > It won't work if I put it like (in snort.conf):
> >
> > preprocessor http_inspect: global \
> >    iis_unicode_map unicode.map 1252
> >    inspect_uri_only
> >
> > snort won't run, and detect error due to this
> line.
> > Can anyone tell me how to enable this
> >
> > inspect_uri_only
> >
> > for ALL http_inspect alerts (so no such alerts
> will be
> > logged except uricontent inspection please?
> >
> > THANK YOU!
> > Sty
> >
> >
> >
> > --- SN ORT <snort_on_acid () yahoo com> wrote:
> > > I don't believe you will be able to specify a
> > > subnet.
> > > I tried that awhile ago and couldn't get it to
> work.
> > > It's either global or server-specific.
> > >
> > > Cheese!
> > >
> > > Marc
> > >
> > > --__--__--
> > >
> > > Message: 1
> > > Wrom: WFAOBUZXUWLSZLKBRNVWWCUFPEGAUTFJMVRESKPNK
> > >        <Krisa.W.Rowland () erdc usace army mil>
> > > To: "'Snort-users () lists sourceforge net'"
> > >        <Snort-users () lists sourceforge net>
> > > Date: Wed, 16 Jun 2004 10:53:56 -0500
> > > Subject: [Snort-users] Ok, Ok - I know -
> > > http_inspect
> > >
> > > This message is in MIME format. Since your mail
> > > reader
> > > does not understand
> > > this format, some or all of this message may not
> be
> > > legible.
> > >
> > > ------_=_NextPart_001_01C453BA.219029D8
> > > Content-Type: text/plain
> > >
> > > I know I'm going to get slaughtered for even
> > > bringing
> > > up the subject of
> > > http_inspect.  I've read through the old posts,
> and
> > > also read through the
> > > manual.  I'm hoping that someone can offer
> > > clarification or guidance on
> > > this, though.  I do not want to disable this
> option
> > > -
> > > but at the moment I'm
> > > going to have to - just pouring out too many
> alerts.
> > > I tried to limit these alerts to only my webfarm
> > > subnet by doing this:
> > >
> > > preprocessor http_inspect_server: server
> x.x.x.0/8 \
> > >     profile all ports { 80 8080 8180 }
> > > oversize_dir_length 500
> > >
> > > But it didn't like that.  I'd just like to
> restrict
> > > these alerts to one
> > > subnet - how do I do that?
> > >
> > > Shouldn't I use the all profile if I'm pretty
> sure
> > > that I have apache and
> > > IIS servers?
> > >
> > > Krisa Rowland
> > > <snip>
> __________________________________________________
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