最新FCKEditor ASP上传绕过漏洞

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exploiut-db：

( Q. M0 g+ C# }8 A. z: w0 OFCKEditor 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
6 Y3 \  Y' u9 @3 V: C5 C- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
! e0 [5 y1 _: A. E6 m# r* S9 a- 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
. c% G" C8 u/ M6 B9 b) Q. \2 \the protection and upload a file with any extension.
9 j6 Q- p" `+ g' P- 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
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Note: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
" @: F( E, X9 X4 [+ d5 [9 MIn “config.asp”, wherever you have:
# M2 p" ]2 K$ B      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
Change it to:
      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”
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php测试无效
asp/aspx测试成功：
% W6 w' D9 |* M; X4 c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

  _: M8 p" x# C* p& ^burpsuite上传包并修改，repeater
/ W- l; Z2 e, \$ Y+ `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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