最新FCKEditor ASP上传绕过漏洞

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exploiut-db：
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* C# F- N/ j" j) ]1 s6 `FCKEditor ASP Version 2.6.8 File Upload Protection Bypass

" G/ z" w$ |. s* f/ w; v& W- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
- Credit goes to: Mostafa Azizi, Soroush Dalili
- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
: v: S! X( P& _6 G$ m) a3 x1 W9 F- 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
2 [! Y" A+ d1 I: @, k. vthe protection and upload a file with any extension.
% ^1 W3 D' p7 S7 n! _; G2 a) o- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
- Solution: Please check the provided reference or the vendor website.
1 F+ h  C2 G4 b% X1 U, H. }- PoC:http://www.youtube.com/v/1VpxlJ5 ... ;rel=0&vq=hd720
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: X* p+ Y" l, j1 `" s" L! q3 TNote: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
In “config.asp”, wherever you have:
      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
3 z1 Z" E) e! y0 P+ yChange it to:
      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”

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php测试无效
asp/aspx测试成功：
4 z# D' X4 \! b& I, v来到/FCKeditor/editor/filemanager/connectors/test.html
( E2 \& y0 X) M$ R9 l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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burpsuite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

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