最新FCKEditor ASP上传绕过漏洞

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exploiut-db：
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2 q8 S, W7 }5 \FCKEditor ASP Version 2.6.8 File Upload Protection Bypass

- 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/
6 t1 m* B  r$ X' ]# W9 t( i! e- Description:
. C, O0 p1 f9 @$ s1 a% ?7 hThere 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/
- Solution: Please check the provided reference or the vendor website.
- PoC:http://www.youtube.com/v/1VpxlJ5 ... ;rel=0&vq=hd720
"
Note: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
In “config.asp”, wherever you have:
      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
# f9 g' \2 \3 L; l8 `- F( qChange it to:
      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”
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5 o% y! \! Z0 t* K3 I8 Fphp测试无效
asp/aspx测试成功：
% T; s1 }# t; Z: u% N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

- P6 k, h' T* S" P2 A  aburpsuite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

3 k( X) g3 o0 ]& k, l如图，webshell为：http://localhost/userfiles/file/asd(1).asp
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