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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# S  Y+ O; O0 y* N, k- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
- Credit goes to: Mostafa Azizi, Soroush Dalili
6 A- w* h% M/ H$ o1 ~. P9 z- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
7 w( O7 C; t: |* ~- Description:
There is no validation on the extensions when FCKEditor 2.6.8 ASP version is
8 d% \, w( U2 f( N) k  fdealing with the duplicate files. As a result, it is possible to bypass
, s: g; x7 h% z* dthe protection and upload a file with any extension.
- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
" u" f1 j( |  X2 _$ @$ H- Solution: Please check the provided reference or the vendor website.
( V2 h6 x9 v3 \$ h$ k0 p& |- q/ \- 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:
In “config.asp”, wherever you have:
      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
* k, u" ~  Z3 b. IChange it to:
1 z( p, B# n: B+ e  W3 l      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”

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9 w) X$ ]! X7 b. a; sphp测试无效
asp/aspx测试成功：
) m' v$ L" @' [; ]- h5 z' `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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. r0 P: K" S& f3 \8 eburpsuite上传包并修改，repeater
! p$ f* }2 C2 H% L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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