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Network Security Snort-Signatures
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[Snort-sigs] False +ves on 2590

from [Russell Fulton] Network Security [Permanent Link]
Subject: [Snort-sigs] False +ves on 2590
Date: Tue, 14 Sep 2004 14:29:03 +1200 
alert tcp $EXTERNAL_NET any -> $SMTP_SERVERS 25 (msg:"SMTP MAIL FROM
overflow attempt"; flow: to_server,established; content:"MAIL FROM";
nocase; isdataat:260; content:!"|0a|"; within:256;
reference:cve,CAN-2004-0399; reference:bugtraq,10290;
reference:url,www.guninski.com/exim1.html; classtype:attempted-admin;
sid:2590; rev:1;) 

This rule will false +ve on things in the body. eg. ... email from
....".

-- 
Russell Fulton, Information Security Officer, The University of Auckland
New Zealand



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