最新FCKEditor ASP上传绕过漏洞

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exploiut-db：

, M$ s; Y" }- |/ I4 w  w9 @; dFCKEditor ASP Version 2.6.8 File Upload Protection Bypass

- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
  W3 U% q& E! a, M5 b# R, T. }- Credit goes to: Mostafa Azizi, Soroush Dalili
- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
6 [6 H1 P$ }/ z8 L  L- 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.
1 b- d8 [4 A( A" l7 }; y- i! [- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
- Solution: Please check the provided reference or the vendor website.
) {" A( R/ u  r- R- PoC:http://www.youtube.com/v/1VpxlJ5 ... ;rel=0&vq=hd720
"
( r9 v8 l; o- I& J( M( @Note: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
* A1 w* {0 Y2 B* }6 YIn “config.asp”, wherever you have:
5 v  U" D1 b2 k      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
7 S1 r, Y) {' L8 uChange it to:
# d: N7 }6 i: M" o$ K1 U2 V& l      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”


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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

2 n7 \, D1 D/ c- u4 kburpsuite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
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! f! W7 a9 S3 \0 L, F3 M( Z如图，webshell为：http://localhost/userfiles/file/asd(1).asp
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