最新FCKEditor ASP上传绕过漏洞

admin

exploiut-db：
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6 M: J: J$ A  HFCKEditor ASP Version 2.6.8 File Upload Protection Bypass

- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
- Credit goes to: Mostafa Azizi, Soroush Dalili
$ V, P: f5 E& b4 u& ?  K- 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.
3 I* J0 E1 G; _( W; m6 u- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
# O8 ^! Z' \/ Y  Z- 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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Note: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
In “config.asp”, wherever you have:
$ w. {9 \# V% W. J+ I# D; F/ }      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
: j! s. x! E% S& V  E8 jChange it to:
1 m) P9 y, D- ?) [+ u$ F  L      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”


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- l+ A( B! r9 c1 y( `php测试无效
asp/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

burpsuite上传包并修改，repeater
7 P: b! D5 A6 ?( w0 @; c名字改为asd.asp%00txt    然后把%00专为URL编码上传后得到asd(1).asp

+ y7 t+ C! T6 o0 r2 U0 u7 P如图，webshell为：http://localhost/userfiles/file/asd(1).asp
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