最新FCKEditor ASP上传绕过漏洞

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exploiut-db：
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6 ~8 x, l. A% Y% u5 rFCKEditor ASP Version 2.6.8 File Upload Protection Bypass
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2 M5 X/ e$ y7 s( b$ e- 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/
- 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
& R& {+ H& R% x1 G0 kthe protection and upload a file with any extension.
) i- v/ B9 ]% {3 Q4 h- G& N) S- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
- Solution: Please check the provided reference or the vendor website.
" X9 B: G# M8 t+ H( O% V- PoC:http://www.youtube.com/v/1VpxlJ5 ... ;rel=0&vq=hd720
"
Note: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
# _4 q* {! h: W* h& x. MIn “config.asp”, wherever you have:
2 A% E" V: r3 Y3 J) N" X      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
( j5 m7 ]4 b0 qChange it to:
      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”

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php测试无效
asp/aspx测试成功：
* U& @' j) ^* ?  O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

& r; M& C) M! k  }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

9 m$ x# V( ]6 G" _如图，webshell为：http://localhost/userfiles/file/asd(1).asp
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