IDS包括哪些功能,怎么实现的?


对于有大量用户的网站,为了方便一般都会布置IDS(入侵检测系统)。因为它提供多种防御骇客攻击的手段,免去了我们代码审计的时间。了解它提供哪些功能以及实现原理后,我们能更好地利用它,以及弥补它的一些不足。请大家谈谈。

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OTIKA 12 years, 5 months ago

我最近也在研究此问题,我在这儿先提供一些规则吧,大家参考一下:

   
  <filters>
  
<filter>
<id>1</id>
<rule><![CDATA[(?:"[^"]*[^-]?>)|(?:[^\w\s]\s*\/>)|(?:>")]]></rule>
<description>finds html breaking injections including whitespace attacks</description>
<tags>
<tag>xss</tag>
<tag>csrf</tag>
</tags>
<impact>4</impact>
</filter>
<filter>
<id>2</id>
<rule><![CDATA[(?:"+.*[<=]\s*"[^"]+")|(?:"\s*\w+\s*=)|(?:>\w=\/)|(?:#.+\)["\s]*>)|(?:"\s*(?:src|style|on\w+)\s*=\s*")|(?:[^"]?"[,;\s]+\w*[\[\(])]]></rule>
<description>finds attribute breaking injections including whitespace attacks</description>
<tags>
<tag>xss</tag>
<tag>csrf</tag>
</tags>
<impact>4</impact>
</filter>
<filter>
<id>3</id>
<rule><![CDATA[(?:^>[\w\s]*<\/?\w{2,}>)]]></rule>
<description>finds unquoted attribute breaking injections</description>
<tags>
<tag>xss</tag>
<tag>csrf</tag>
</tags>
<impact>2</impact>
</filter>
<filter>
<id>4</id>
<rule><![CDATA[(?:[+\/]\s*name[\W\d]*[)+])|(?:;\W*url\s*=)|(?:[^\w\s\/?:>]\s*(?:location|referrer|name)\s*[^\/\w\s-])]]></rule>
<description>Detects url-, name-, JSON, and referrer-contained payload attacks</description>
<tags>
<tag>xss</tag>
<tag>csrf</tag>
</tags>
<impact>5</impact>
</filter>
<filter>
<id>5</id>
<rule><![CDATA[(?:\W\s*hash\s*[^\w\s-])|(?:\w+=\W*[^,]*,[^\s(]\s*\()|(?:\?"[^\s"]":)|(?:(?<!\/)__[a-z]+__)|(?:(?:^|[\s)\]\}])(?:s|g)etter\s*=)]]></rule>
<description>Detects hash-contained xss payload attacks, setter usage and property overloading</description>
<tags>
<tag>xss</tag>
<tag>csrf</tag>
</tags>
<impact>5</impact>
</filter>
<filter>
<id>6</id>
<rule><![CDATA[(?:with\s*\(\s*.+\s*\)\s*\w+\s*\()|(?:(?:do|while|for)\s*\([^)]*\)\s*\{)|(?:\/[\w\s]*\[\W*\w)]]></rule>
<description>Detects self contained xss via with(), common loops and regex to string conversion</description>
<tags>
<tag>xss</tag>
<tag>csrf</tag>
</tags>
<impact>5</impact>
</filter>
<filter>
<id>7</id>
<rule><![CDATA[(?:[=(].+\?.+:)|(?:with\([^)]*\)\))|(?:\.\s*source\W)]]></rule>
<description>Detects JavaScript with(), ternary operators and XML predicate attacks</description>
<tags>
<tag>xss</tag>
<tag>csrf</tag>
</tags>
<impact>5</impact>
</filter>
<filter>
<id>8</id>
<rule><![CDATA[(?:\/\w*\s*\)\s*\()|(?:\([\w\s]+\([\w\s]+\)[\w\s]+\))|(?:(?<!(?:mozilla\/\d\.\d\s))\([^)[]+\[[^\]]+\][^)]*\))|(?:[^\s!][{([][^({[]+[{([][^}\])]+[}\])][\s+",\d]*[}\])])|(?:"\)?\]\W*\[)|(?:=\s*[^\s:;]+\s*[{([][^}\])]+[}\])];)]]></rule>
<description>Detects self-executing JavaScript functions</description>
<tags>
<tag>xss</tag>
<tag>csrf</tag>
</tags>
<impact>5</impact>
</filter>
<filter>
<id>9</id>
<rule><![CDATA[(?:\\u00[a-f0-9]{2})|(?:\\x0*[a-f0-9]{2})|(?:\\\d{2,3})]]></rule>
<description>Detects the IE octal, hex and unicode entities</description>
<tags>
<tag>xss</tag>
<tag>csrf</tag>
</tags>
<impact>2</impact>
</filter>
<filter>
<id>10</id>
<rule><![CDATA[(?:(?:\/|\\)?\.+(\/|\\)(?:\.+)?)|(?:\w+\.exe\??\s)|(?:;\s*\w+\s*\/[\w*-]+\/)|(?:\d\.\dx\|)|(?:%(?:c0\.|af\.|5c\.))|(?:\/(?:%2e){2})]]></rule>
<description>Detects basic directory traversal</description>
<tags>
<tag>dt</tag>
<tag>id</tag>
<tag>lfi</tag>
</tags>
<impact>5</impact>
</filter>

还有很多,字数限制,直接看phpids.org中的default_filter.xml吧

迪迪飞鸿工作室 answered 12 years, 5 months ago

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