最新FCKEditor ASP上传绕过漏洞

admin

exploiut-db：
- d0 k) G6 Q$ C' S+ O% O# D
$ u' r6 |2 `6 s% H0 b5 t' o% CFCKEditor ASP Version 2.6.8 File Upload Protection Bypass
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- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
- Credit goes to: Mostafa Azizi, Soroush Dalili
" X- K4 q2 U5 Q) O  b5 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
$ e) T3 g& L  m2 O1 _dealing with the duplicate files. As a result, it is possible to bypass
8 }: S! R$ n$ e5 N; Q' w, r; b1 Ethe protection and upload a file with any extension.
- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
% `+ ]! C6 U; x; A! a- 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:
& v$ q3 s. s' Q* _      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
5 B4 Z5 Z9 C/ R: Y: n1 `Change it to:
- s( z' l6 U# X, l; j* R9 x8 g5 W      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”

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/ \0 e( |: W& z( Kphp测试无效
! h! Q8 i- E  ?) }! z  Nasp/aspx测试成功：
0 s& S) b9 ?* l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
  d/ L8 l" F/ `2 B, H$ I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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/ x2 E3 Z# {, U% }如图，webshell为：http://localhost/userfiles/file/asd(1).asp
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