最新FCKEditor ASP上传绕过漏洞

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exploiut-db：
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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
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- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
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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/
4 u9 l8 b! s( N0 Q- 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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0 j# M" r; W+ b% j3 D; d- |Note: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
& Y" q0 _2 y0 \/ UIn “config.asp”, wherever you have:
1 r# v* u7 S- J0 _! g      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
% S% w9 {' ^  sChange it to:
* h& \; f  |1 I4 \0 P      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”


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php测试无效
( @1 }3 u: j3 k' h) H7 @' }7 n5 |asp/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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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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