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Network Security Snort-Signatures
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[Snort-sigs] False positive in 882.5 (WEB-CGI calendar access)

Subject: [Snort-sigs] False positive in 882.5 (WEB-CGI calendar access)
Date: Fri, 4 Feb 2005 14:24:05 -0700

Rule:  WEB-CGI calendar access

--
Sid: 882

--

False Positive
The current version of the rule will match on any URI containing 
/calendar, not just /calendar.pl or /calendar_admin.pl. It seems 
the rule could be substantially more accurate if the following 
PCRE is added:


alert tcp $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS
(msg:"WEB-CGI calendar access"; 
flow:to_server,established; 
uricontent:"/calendar"; nocase; 
pcre:"/\/calendar(_admin)?\.pl\b/iU"; 
classtype:attempted-recon; sid:882; rev:6;) 


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