Re: Possible FP 17363

["Weir, Jason" <jason.weir () nhrs org>]

have to see your oinkmaster.conf and snort.con
 
-J

        -----Original Message-----
        From: Lay, James [mailto:james.lay () wincofoods com] 
        Sent: Tuesday, October 26, 2010 10:13 AM
        To: snort-sigs () lists sourceforge net
        Subject: Re: [Snort-sigs] [Spam] Re: Possible FP 17363
        
        

        Hrmm....that's confusing then...oinkmaster says:

         

        Loading /usr/local/etc/snort/oinkmaster.conf

        Downloading file from
http://www.snort.org/pub-bin/oinkmaster.cgi/*oinkcode*/snortrules-snapsh
ot-2900.tar.gz... done.

        Archive successfully downloaded, unpacking... done.

        Downloading file from
http://rules.emergingthreats.net/open-nogpl/snort-2.8.6/emerging.rules.t
ar.gz... done.

        Archive successfully downloaded, unpacking... done.

        Setting up rules structures... done.

        Processing downloaded rules... disabled 8, enabled 0, modified
0, total=21693

        Setting up rules structures... done.

        Comparing new files to the old ones... done.

        Updating local rules files... done.

         

        Yet:

        [08:11:48 me@ids:~/rules$] sudo grep 17363 *.rules

        web-client.rules:alert tcp $EXTERNAL_NET $HTTP_PORTS ->
$HOME_NET any (msg:"WEB-CLIENT Apple computer finder DMG volume name
memory corruption"; flow:to_client,established; content:"|4C 41 42 4C|";
byte_test:2,>,254,12,relative; metadata:policy balanced-ips drop, policy
security-ips drop, service http; reference:cve,2007-0197;
classtype:attempted-user; sid:17363; rev:1;)

         

        Are rules not getting updated in 2900?  Or is my oinkmaster not
doing what it's supposed to do?  Thanks for any help.

         

        James

         

        From: Alex Kirk [mailto:akirk () sourcefire com] 
        Sent: Monday, October 25, 2010 10:44 AM
        To: rmkml
        Cc: Lay, James; snort-sigs () lists sourceforge net; rmkml () free fr
        Subject: [Spam] Re: [Snort-sigs] Possible FP 17363
        Importance: Low

         

        Actually, this rule is currently at rev:3 - adding a flowbit
check and some additional bytes to the content match - due to earlier
false positive reports. If you get further FPs with the current revision
of the rule, please let us know.

        On Mon, Oct 25, 2010 at 12:38 PM, rmkml <rmkml () yahoo fr> wrote:

        Hi James,
        maybe for "small" reduce FP add "isdataat:255,relative;" after
byte_test()?
        another maybe null byte are separator? and instead
"isdataat:255,relative; content:!"|00|"; within:255;" ?
        Regards
        Rmkml
        
        PS:
http://www.securityfocus.com/archive/1/archive/1/456578/100/0/threaded

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