最新FCKEditor ASP上传绕过漏洞

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exploiut-db：

! H1 W; E$ a- z( V" ~- W* E% UFCKEditor ASP Version 2.6.8 File Upload Protection Bypass
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6 F' x5 a- w* ~% U  O! o- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
- Credit goes to: Mostafa Azizi, Soroush Dalili
, t. b/ U3 `: T, m6 `8 ~- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
& i- B* \; J; j/ G; H- Description:
3 R8 B3 t1 r$ \! YThere is no validation on the extensions when FCKEditor 2.6.8 ASP version is
$ M/ v/ M: L9 q" b9 y; K$ Cdealing 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.
- PoC:http://www.youtube.com/v/1VpxlJ5 ... ;rel=0&vq=hd720
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5 s% \' h, D2 s8 G! ?9 A& cNote: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
In “config.asp”, wherever you have:
      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
Change it to:
8 K1 j9 F6 [, g$ }$ W      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”




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2 I% Y1 t' |" p6 Lphp测试无效
& y3 o" F. `) o4 P% \. o3 Z- Zasp/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
7 L" b0 N6 E8 t4 u1 d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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