最新FCKEditor ASP上传绕过漏洞

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exploiut-db：
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FCKEditor ASP Version 2.6.8 File Upload Protection Bypass
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: ^: d8 n8 X- I- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
# m. ]: S0 L1 N6 P1 U, Q/ k- Credit goes to: Mostafa Azizi, Soroush Dalili
- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
8 g$ U, B& h8 O# y- 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
" e6 y! V& ?& ~9 S6 A& N9 vthe protection and upload a file with any extension.
; t5 R: n$ S  M8 F- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
- Solution: Please check the provided reference or the vendor website.
) E1 _. x' c( A- ^8 e- H& b# S- 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:
. G  z" Z9 D% d# [4 ^% B/ F1 [      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
Change it to:
      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”



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) }/ c8 T4 j( d( j  q* U4 H! L6 |php测试无效
6 _. {* P% M' `3 qasp/aspx测试成功：
' l" Y. H" p$ l. M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

6 Z* `: z# S5 V6 zburpsuite上传包并修改，repeater
; s- N$ \3 {; E4 x5 x2 K名字改为asd.asp%00txt    然后把%00专为URL编码上传后得到asd(1).asp

3 ]2 a* o* p" L0 Z如图，webshell为：http://localhost/userfiles/file/asd(1).asp