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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- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
4 E3 \6 V! _) b) b* c: h5 u  M- Credit goes to: Mostafa Azizi, Soroush Dalili
- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
- Description:
, A% Z1 }3 Q- f. B0 X9 _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.
( D( w' r! r8 t2 E. k6 S& d- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
7 _0 a4 {# ]9 A- Solution: Please check the provided reference or the vendor website.
8 x0 F* f0 g) Y) F* [- 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:
; D  ^0 U( r' e+ hIn “config.asp”, wherever you have:
% T( D( ~/ p( ]      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
  B* _3 z- ~! t  F: K" UChange it to:
      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”





php测试无效
asp/aspx测试成功：
$ ~/ q6 z; z# j5 x: y/ W& E: h  Q$ N来到/FCKeditor/editor/filemanager/connectors/test.html
, H/ w$ v( L4 D7 G& K3 W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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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

) c4 x6 Q1 |5 n$ `如图，webshell为：http://localhost/userfiles/file/asd(1).asp