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Network Security Snort-Users
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[Snort-users] Alert with bug?

Subject: [Snort-users] Alert with bug?
Date: Wed, 24 Aug 2005 11:59:49 -0300 (ART)
Hi,
I have some signatures as example:
alert tcp $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"WEB-FRONTPAGE 
_vti_inf.html access"; flow:to_server,established; uricontent:"/_vti_inf.html"; 
nocase; reference:nessus,11455; classtype:web-application-activity; sid:990; 
rev:9;)

This signature generated some alerts.But the packets that had generated the 
alert don't have payload, they only have a ip and tcp header. How can this 
packet  generate alert without having the uricontent "/_vi_inf.html" specified 
in the signature ?



                
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