最新FCKEditor ASP上传绕过漏洞

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exploiut-db：

2 {! ~5 `9 L) r2 n9 M: c. DFCKEditor ASP Version 2.6.8 File Upload Protection Bypass

- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
: o4 h9 H2 G1 M  C- Credit goes to: Mostafa Azizi, Soroush Dalili
- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
- Description:
There is no validation on the extensions when FCKEditor 2.6.8 ASP version is
- K4 S8 ~! m) n; Ndealing with the duplicate files. As a result, it is possible to bypass
7 f  q0 m3 O; `* G; ?, uthe 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.
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; Q, W5 u( M* s& KNote: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
- [8 A, b5 ~& Y/ `$ U4 G+ Y) mIn “config.asp”, wherever you have:
& j5 |7 B5 a% @      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
; }8 x% D: l; X( q$ v+ MChange it to:
      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”


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php测试无效
asp/aspx测试成功：
" {" `% R+ |4 z! y来到/FCKeditor/editor/filemanager/connectors/test.html
4 f1 A% C1 B8 L3 W6 P# R, L% u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

) H% e& u* P! v3 cburpsuite上传包并修改，repeater
! u' P( N& a6 ~7 r: w! B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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如图，webshell为：http://localhost/userfiles/file/asd(1).asp

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