最新FCKEditor ASP上传绕过漏洞

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exploiut-db：

FCKEditor ASP Version 2.6.8 File Upload Protection Bypass
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- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
- Credit goes to: Mostafa Azizi, Soroush Dalili
- w; ~; L6 B4 O" a7 {# {& E4 B- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
! t* K- K, V! K% G8 L* P. i- 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
0 m3 c- D1 e2 h6 }  B6 Kthe protection and upload a file with any extension.
( R( R2 \1 J' n3 z8 u% d3 g* `8 E- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
- K1 Q1 W. t$ D$ I& q! T# U% q5 }- Solution: Please check the provided reference or the vendor website.
- PoC:http://www.youtube.com/v/1VpxlJ5 ... ;rel=0&vq=hd720
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Note: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
5 V* ]6 z6 G3 o5 jIn “config.asp”, wherever you have:
      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
) a7 l; t3 `$ m- I# c" x1 NChange it to:
      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”


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php测试无效
asp/aspx测试成功：
5 N9 z. e, u! h- A+ s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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! d6 `" S+ I5 \. [; k4 X+ A8 p) {# oburpsuite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

如图，webshell为：http://localhost/userfiles/file/asd(1).asp
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