最新FCKEditor ASP上传绕过漏洞

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exploiut-db：

FCKEditor ASP Version 2.6.8 File Upload Protection Bypass
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4 g6 b# s; E6 ^+ F- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
0 k6 R2 b9 A* c8 ?- Credit goes to: Mostafa Azizi, Soroush Dalili
- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
- 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
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.
% |. w- X" k1 f' T$ u! V9 A# D- PoC:http://www.youtube.com/v/1VpxlJ5 ... ;rel=0&vq=hd720
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: |& n. v' p5 E% bNote: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
In “config.asp”, wherever you have:
      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
" h5 t% q- E1 l& vChange it to:
. f3 h4 x. o8 }      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”
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8 n1 H+ M  H& ]* h" w( pphp测试无效
asp/aspx测试成功：
来到/FCKeditor/editor/filemanager/connectors/test.html
$ X% L* }! x) j$ }& ]7 ^( o* d9 @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

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

0 `) U* G( X  J+ b, n0 W如图，webshell为：http://localhost/userfiles/file/asd(1).asp
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