Snort mailing list archives

Re: Need help - Fatal Error


From: "Badgley (US), Michael B" <michael.b.badgley () boeing com>
Date: Wed, 10 Apr 2019 15:56:33 +0000

Thank you for prompt reply - we are using version 2.9.0.5



I finally found a copy of the manual, and uribuf does not appear to be valid in that version - so we are removing that 
option from the urilen command and re-testing.



FOUO

Mike Badgley, CISSP

(256) 830-3836 (Desk)

GMD NIM



From: Joel Esler (jesler) [mailto:jesler () cisco com]
Sent: Wednesday, April 10, 2019 10:37 AM
To: Badgley (US), Michael B <michael.b.badgley () boeing com>
Cc: snort-users () lists snort org
Subject: Re: [Snort-users] Need help - Fatal Error



What version of Snort are you using?





   On Apr 10, 2019, at 11:28 AM, Badgley (US), Michael B <michael.b.badgley () boeing com<mailto:michael.b.badgley () 
boeing com>> wrote:



   I was handed the following rule to implement



   alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"HTTP Client Header contains 'Host|3a 20|ip-api com', URI 
'/json/' (Quasar RAT)"; sid:10002; rev:1; flow:established,to_server; content:"Host|3a 20|ip-api|2e|com|0d 0a|"; 
http_header; fast_pattern:only; content:"User-Agent|3a 20|Mozilla/5.0 (Windows NT 6.3|3b| rv|3a|48.0) Gecko/20100101 
Firefox/48.0|0d 0a|"; http_header; content:"/json/"; http_uri; depth:6; urilen:6,norm; priority:2;)



   It is giving me the following - Invalid 'urilen' argument. Fatal Error.



   When I remove the urilen argument (along with ":6,norm" - the error goes away.



   The format and syntax look ok per the documentation.



   Mike Badgley, CISSP
   GMD NIM
   michael.b.badgley () boeing com<mailto:michael.b.badgley () boeing com>

   (256) 830-3836 (Desk)
   (256) 461-6187 (Outlook Phone)

   <image002.png>Certified Information Systems Security Professional (CISSP)

   Issued to Michael Badgley

   Issued by (ISC)²



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