# Copyright 2001-2005 Sourcefire, Inc. All Rights Reserved## This file may contain proprietary rules that were created, tested and# certified by Sourcefire, Inc. (the "VRT Certified Rules") as well as# rules that were created by Sourcefire and other third parties and# distributed under the GNU General Public License (the "GPL Rules").  The# VRT Certified Rules contained in this file are the property of# Sourcefire, Inc. Copyright 2005 Sourcefire, Inc. All Rights Reserved.# The GPL Rules created by Sourcefire, Inc. are the property of# Sourcefire, Inc. Copyright 2002-2005 Sourcefire, Inc. All Rights# Reserved.  All other GPL Rules are owned and copyrighted by their# respective owners (please see www.snort.org/contributors for a list of# owners and their respective copyrights).  In order to determine what# rules are VRT Certified Rules or GPL Rules, please refer to the VRT# Certified Rules License Agreement.### $Id: web-client.rules,v 1.20.2.8.2.7 2005/07/22 19:19:54 mwatchinski Exp $#---------------# WEB-CLIENT RULES#---------------## These signatures look for two things:# * bad things coming from our users# * attacks against our web usersalert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"WEB-CLIENT Outlook EML access"; flow:from_client,established; uricontent:".eml"; reference:nessus,10767; classtype:attempted-user; sid:1233; rev:11;)alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"WEB-CLIENT Microsoft emf metafile access"; flow:from_client,established; uricontent:".emf"; reference:bugtraq,10120; reference:bugtraq,9707; reference:cve,2003-0906; reference:url,www.microsoft.com/technet/security/bulletin/MS04-011.mspx; classtype:attempted-user; sid:2435; rev:5;)alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"WEB-CLIENT Microsoft wmf metafile access"; flow:from_client,established; uricontent:".wmf"; reference:bugtraq,10120; reference:bugtraq,9707; reference:cve,2003-0906; reference:url,www.microsoft.com/technet/security/bulletin/MS04-011.mspx; classtype:attempted-user; sid:2436; rev:5;)alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"WEB-CLIENT XMLHttpRequest attempt"; flow:to_client,established; content:"new XMLHttpRequest|28|"; content:"file|3A|//"; nocase; reference:bugtraq,4628; reference:cve,2002-0354; classtype:web-application-attack; sid:1735; rev:7;)alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"WEB-CLIENT readme.eml download attempt"; flow:from_client,established; uricontent:"/readme.eml"; nocase; reference:url,www.cert.org/advisories/CA-2001-26.html; classtype:attempted-user; sid:1284; rev:10;)alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"WEB-CLIENT readme.eml autoload attempt"; flow:to_client,established; content:"window.open|28 22|readme.eml|22|"; nocase; reference:url,www.cert.org/advisories/CA-2001-26.html; classtype:attempted-user; sid:1290; rev:10;)alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"WEB-CLIENT Javascript document.domain attempt"; flow:to_client,established; content:"document.domain|28|"; nocase; reference:bugtraq,5346; reference:cve,2002-0815; classtype:attempted-user; sid:1840; rev:7;)alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"WEB-CLIENT Javascript URL host spoofing attempt"; flow:to_client,established; content:"javascript|3A|//"; nocase; reference:bugtraq,5293; classtype:attempted-user; sid:1841; rev:5;)alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"WEB-CLIENT RealPlayer arbitrary javascript command attempt"; flow:to_client,established; content:"Content-Type|3A|"; nocase; pcre:"/^Content-Type\x3a\s*application\x2fsmi.*?<area[\s\n\r]+href=[\x22\x27]file\x3ajavascript\x3a/smi"; reference:bugtraq,8453; reference:bugtraq,9378; reference:cve,2003-0726; classtype:attempted-user; sid:2437; rev:7;)alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"WEB-CLIENT RealPlayer playlist file URL overflow attempt"; flow:from_server,established; flowbits:isset,realplayer.playlist; content:"file|3A|//"; nocase; pcre:"/^file\x3a\x2f\x2f[^\n]{400}/smi"; reference:bugtraq,9579; reference:cve,2004-0258; classtype:attempted-user; sid:2438; rev:5;)alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"WEB-CLIENT RealPlayer playlist http URL overflow attempt"; flow:from_server,established; flowbits:isset,realplayer.playlist; content:"http|3A|//"; nocase; pcre:"/^http\x3a\x2f\x2f[^\n]{400}/smi"; reference:bugtraq,9579; reference:cve,2004-0258; classtype:attempted-user; sid:2439; rev:5;)alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"WEB-CLIENT RealPlayer playlist rtsp URL overflow attempt"; flow:from_server,established; flowbits:isset,realplayer.playlist; content:"rtsp|3A|//"; nocase; pcre:"/^http\x3a\x2f\x2f[^\n]{400}/smi"; reference:bugtraq,9579; reference:cve,2004-0258; classtype:attempted-user; sid:2440; rev:5;)alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"WEB-CLIENT Norton antivirus sysmspam.dll load attempt"; flow:to_client,established; content:"clsid|3A|"; nocase; content:"0534CF61-83C5-4765-B19B-45F7A4E135D0"; nocase; reference:bugtraq,9916; reference:cve,2004-0363; classtype:attempted-admin; sid:2485; rev:5;)alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"WEB-CLIENT local resource redirection attempt"; flow:to_client,established; content:"Location|3A|"; nocase; pcre:"/^Location\x3a\s*URL\s*\x3a/smi"; reference:cve,2004-0549; reference:url,www.kb.cert.org/vuls/id/713878; classtype:attempted-user; sid:2577; rev:3;)