X-Git-Url: http://ftp.carnet.hr/carnet-debian/scm?a=blobdiff_plain;f=etc%2Frules%2Fweb_rules.xml;h=b35d8995e9cc522f263391e5646ac5d3c12ac743;hb=6ef2f786c6c8ead94841b5f93baf9f43421f08c8;hp=ff185a2d50f3f81c4e54900aa4c9a627b5e818e6;hpb=914feba5d54f979cd5d7e69c349c3d01f630042a;p=ossec-hids.git

diff --git a/etc/rules/web_rules.xml b/etc/rules/web_rules.xml
index ff185a2..b35d899 100755
--- a/etc/rules/web_rules.xml
+++ b/etc/rules/web_rules.xml
@@ -1,4 +1,5 @@
-<!-- @(#) $Id: web_rules.xml,v 1.25 2009/09/25 14:35:20 dcid Exp $
+<!-- @(#) $Id: ./etc/rules/web_rules.xml, 2012/05/08 dcid Exp $
+
   -
   -  Official Web access rules for OSSEC.
   -
@@ -7,7 +8,7 @@
   -
   -  This program is a free software; you can redistribute it
   -  and/or modify it under the terms of the GNU General Public
-  -  License (version 3) as published by the FSF - Free Software
+  -  License (version 2) as published by the FSF - Free Software
   -  Foundation.
   -
   -  License details: http://www.ossec.net/en/licensing.html
@@ -20,6 +21,13 @@
     <description>Access log messages grouped.</description>
   </rule>
 
+  <rule id="31108" level="0">
+    <if_sid>31100</if_sid>
+    <id>^2|^3</id>
+    <compiled_rule>is_simple_http_request</compiled_rule>
+    <description>Ignored URLs (simple queries).</description>
+   </rule>
+
   <rule id="31101" level="5">
     <if_sid>31100</if_sid>
     <id>^4</id>
@@ -28,14 +36,8 @@
 
   <rule id="31102" level="0">
     <if_sid>31101</if_sid>
-    <id>^403|^404</id>
-    <url>.jpg$|.gif$|favicon.ico$|.png$|robots.txt$|.css$</url>
-    
-    <!-- Add any other url to be ignored in here
-         (to avoid too many false positives from your site)
-    <url>|.html$|.jpe$</url>
-    -->
-    
+    <url>.jpg$|.gif$|favicon.ico$|.png$|robots.txt$|.css$|.js$</url>
+    <compiled_rule>is_simple_http_request</compiled_rule>
     <description>Ignored extensions on 400 error codes.</description>
   </rule>
   
@@ -52,39 +54,55 @@
     
     <!-- Attempt to do directory transversal, simple sql injections,
       -  or access to the etc or bin directory (unix). -->
-    <url>%027|%00|%01|%7f|%2E%2E|%0A|%0D|../..|..\..|echo;|..</url>
+    <url>%027|%00|%01|%7f|%2E%2E|%0A|%0D|../..|..\..|echo;|..|</url>
     <url>cmd.exe|root.exe|_mem_bin|msadc|/winnt/|</url>
-    <url>/x90/|default.ida|/sumthin|nsiislog.dll|chmod%|wget%|cd%|</url>
-    <url>cat%|exec%|rm%20</url>
+    <url>/x90/|default.ida|/sumthin|nsiislog.dll|chmod%|wget%|cd%20|</url>
+    <url>cat%20|exec%20|rm%20</url>
     <description>Common web attack.</description>
     <group>attack,</group>
   </rule>
 
   <rule id="31105" level="6">
     <if_sid>31100</if_sid>
-    <url>%3Cscript|%2Fscript|script>|script%3E|SRC=javascript|IMG%20|</url>
+    <url>%3Cscript|%3C%2Fscript|script>|script%3E|SRC=javascript|IMG%20|</url>
     <url>%20ONLOAD=|INPUT%20|iframe%20</url>
     <description>XSS (Cross Site Scripting) attempt.</description>
     <group>attack,</group>
   </rule>
   
-  <rule id="31106" level="12">
+  <rule id="31106" level="6">
     <if_sid>31103, 31104, 31105</if_sid>
     <id>^200</id>
     <description>A web attack returned code 200 (success).</description>
     <group>attack,</group>
   </rule>
 
+  <rule id="31110" level="6">
+    <if_sid>31100</if_sid>
+    <url>?-d|?-s|?-a|?-b|?-w</url>
+    <description>PHP CGI-bin vulnerability attempt.</description>
+    <group>attack,</group>
+  </rule>
+
+  <rule id="31109" level="6">
+    <if_sid>31100</if_sid>
+    <url>+as+varchar(8000)</url>
+    <regex>%2Bchar\(\d+\)%2Bchar\(\d+\)%2Bchar\(\d+\)%2Bchar\(\d+\)%2Bchar\(\d+\)%2Bchar\(\d+\)</regex>
+    <description>MSSQL Injection attempt (/ur.php, urchin.js)</description>
+    <group>attack,</group>
+  </rule>
+
+
   <!-- If your site have a search engine, you may need to ignore
     - it in here.
     -->
   <rule id="31107" level="0">
     <if_sid>31103, 31104, 31105</if_sid>
-    <url>^/search.php?search=|^index.php?searchword=</url>
+    <url>^/search.php?search=|^/index.php?searchword=</url>
     <description>Ignored URLs for the web attacks</description>
   </rule>
 
-  <rule id="31115" level="13" maxsize="2900">
+  <rule id="31115" level="13" maxsize="5900">
     <if_sid>31100</if_sid>
     <description>URL too long. Higher than allowed on most </description>
     <description>browsers. Possible attack.</description>
@@ -120,11 +138,20 @@
     <options>alert_by_email</options>
     <description>Web server 503 error code (Service unavailable).</description>
   </rule>
+
+
+  <!-- Rules to ignore crawlers -->
+  <rule id="31140" level="0">
+    <if_sid>31101</if_sid>
+    <compiled_rule>is_valid_crawler</compiled_rule>
+    <description>Ignoring google/msn/yahoo bots.</description>
+  </rule>
+
   
   <rule id="31151" level="10" frequency="10" timeframe="120">
     <if_matched_sid>31101</if_matched_sid>
     <same_source_ip />
-    <description>Mutiple web server 400 error codes </description>
+    <description>Multiple web server 400 error codes </description>
     <description>from same source ip.</description>
     <group>web_scan,recon,</group>
   </rule>