最新FCKEditor ASP上传绕过漏洞

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exploiut-db：

7 r* p: y( X+ Z* T, \FCKEditor ASP Version 2.6.8 File Upload Protection Bypass

- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
9 T; E$ U7 [! i1 J6 d" O- Credit goes to: Mostafa Azizi, Soroush Dalili
- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
- Description:
4 U) ^- v' `8 r! ^" o# KThere is no validation on the extensions when FCKEditor 2.6.8 ASP version is
3 I# a$ F& U1 g" Adealing with the duplicate files. As a result, it is possible to bypass
/ l8 C$ t/ Y7 }0 Z" }* ^the protection and upload a file with any extension.
: X) I8 p' B7 }  J" e% g- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
- Solution: Please check the provided reference or the vendor website.
9 O2 F5 S5 r& Z0 N: E- 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:
+ H8 x$ F- }* M2 L+ wIn “config.asp”, wherever you have:
      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
: j& ^( b% d6 |1 EChange it to:
      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”

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* a/ A" c! r2 qphp测试无效
' j8 o* W0 c! }; masp/aspx测试成功：
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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burpsuite上传包并修改，repeater
/ y% C( p' b# i8 j/ n) M名字改为asd.asp%00txt    然后把%00专为URL编码上传后得到asd(1).asp

, S: G  m! M. \2 N& Z. t% h如图，webshell为：http://localhost/userfiles/file/asd(1).asp

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