最新FCKEditor ASP上传绕过漏洞

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FCKEditor ASP Version 2.6.8 File Upload Protection Bypass

! A% O4 Q" v) ]- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
, I) o8 E$ o& L6 s7 I- L- Credit goes to: Mostafa Azizi, Soroush Dalili
# N+ T( u( j$ [. |$ c+ {- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
- Description:
There is no validation on the extensions when FCKEditor 2.6.8 ASP version is
dealing with the duplicate files. As a result, it is possible to bypass
the protection and upload a file with any extension.
- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
$ Y: X4 d5 d( l2 s. d- Solution: Please check the provided reference or the vendor website.
- PoC:http://www.youtube.com/v/1VpxlJ5 ... ;rel=0&vq=hd720
- {. E6 x9 |4 g9 o"
Note: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
In “config.asp”, wherever you have:
      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
4 K# f$ s, ~) a! {Change it to:
      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”
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php测试无效
# u0 I+ m0 m5 p3 q4 y  gasp/aspx测试成功：
来到/FCKeditor/editor/filemanager/connectors/test.html
因为结合了之前二次上传的漏洞，所以先上传任意内容的文件：asd.asp.txt
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* ~$ ?8 Y5 H* Sburpsuite上传包并修改，repeater
名字改为asd.asp%00txt    然后把%00专为URL编码上传后得到asd(1).asp
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如图，webshell为：http://localhost/userfiles/file/asd(1).asp