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

! L: w8 H" \  D% h+ N& g, i- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
! Z+ ]0 @4 t: ~7 Y- Credit goes to: Mostafa Azizi, Soroush Dalili
* F' F/ r/ ^! y' G- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
" H% C: |# A& }- Description:
There is no validation on the extensions when FCKEditor 2.6.8 ASP version is
; v1 f/ n0 {9 E# L( tdealing with the duplicate files. As a result, it is possible to bypass
the protection and upload a file with any extension.
- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
. `& w8 ~" T0 Y; T- Q- 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:
3 {! k) Z6 m0 R3 b1 F      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
4 ~! c1 k& Q& E1 H5 O' o& ^Change it to:
      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”
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" U8 S3 s. \& @php测试无效
2 k5 g0 w' M/ r5 z  S- vasp/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

$ j3 ~1 l- [$ _% [& |burpsuite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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如图，webshell为：http://localhost/userfiles/file/asd(1).asp

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