MARS - tcp port 0?

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Jun 4th, 2008
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On MARS alerts (from IPS 4260) are received on one of the IE vulnerabilities.


Event- Microsoft Internet Explorer Dynamic HTML Element Processing Memory Corruption Vulnerability

Source ip/port-a.b.c.d/0

Destination ip/port-w.x.y.z/0

Protocol-TCP


[w.x.y.z is my proxy]

[a.b.c.d should be a web server, running port 80]


Qn> what is tcp port 0?why does MARS display as port 0?

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Farrukh Haroon Thu, 06/05/2008 - 02:23
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If you click on the name of the 'Reporting Device, for example 'ABCD-IDS-1', MARS will show you the 'Raw Event' (as received from the sensor). This will help you show if the IPS is sending the zero port or its the MARS.


Some signatures don't report the port number properly, I don't this this is a bug or by design :) (Since the signature already says 'HTML' )


Btw, I see this false positive on one of our customer's all the time....


Regards


Farrukh

darin.marais Thu, 06/05/2008 - 04:06
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Just a guess here; but it could it be that the event is summarized.

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