Snort mailing list archives

Re: new SIP preproc on snort v2.9.1 never firing?


From: rmkml <rmkml () yahoo fr>
Date: Wed, 7 Sep 2011 10:26:57 +0200 (CEST)

Hi Alex,
How to enable this please?
It's not enabled on snort.conf default?
But SIP preproc stats (snort verbose mode) work:
 ...
 SIP Preprocessor Statistics
  Total sessions: 28
  Preprocessor events: 31
  Total  dialogs: 47
  Requests: 195
          invite:   39
          cancel:   11
             ack:   22
             bye:   9
 ...
Regards
Rmkml


On Tue, 6 Sep 2011, Alex Kirk wrote:

Do you have the preprocessor rules enabled?

On Tue, Sep 6, 2011 at 5:32 PM, rmkml <rmkml () yahoo fr> wrote:
      Hi,
      Im continue testing last snort v2.9.1, but new SIP preproc never firing.
      Anyone have alert with SIP preproc ? (GID 140)

      Im tested with default snort.conf:
       ...
       PortVar 'SIP_PORTS' defined :  [ 5060:5061 5600 ]
       ...
       Loading dynamic preprocessor library 
dynamic-preprocessors/build/usr/local/lib/snort_dynamicpreprocessor//libsf_sip_preproc.so... done
       ...
       SIP config:
        Max number of sessions: 10000 (Default)
        Status: ENABLED
        Ignore media channel: DISABLED
        Max URI length: 512
        Max Call ID length: 80
        Max Request name length: 20 (Default)
        Max From length: 256 (Default)
        Max To length: 256 (Default)
        Max Via length: 1024 (Default)
        Max Contact length: 512
        Max Content length: 1024 (Default)
        Ports:
              5060    5061    5600
        Methods:
         invite cancel ack bye register options refer subscribe update join info message notify benotify do qauth 
sprack publish service unsubscribe prack
      ...
        o"  )~   Version 2.9.1 IPv6 GRE (Build 71)
      ...
                 Preprocessor Object: SF_SIP (IPV6)  Version 1.1  <Build 1>
      ...

      Im reduced sip length but sip preproc never firing again.

      Im read doc/README.sip and of course enabled udp on stream5 (default snort.conf).
      Tested with nessus,nmap,many scanner, replay traffic, sipp...
      Regards
      Rmkml

      http://twitter.com/rmkml

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--
Alex Kirk
AEGIS Program Lead
Sourcefire Vulnerability Research Team
+1-410-423-1937
alex.kirk () sourcefire com

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