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

- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
- Credit goes to: Mostafa Azizi, Soroush Dalili
# p3 X- N# F( m* O" p) s: q$ W- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
9 }& [$ h+ C1 I. b; E, h1 E4 r/ F4 c- Description:
9 G4 [7 N* R2 Z% H" L& J: rThere 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
" g3 Q: t. J9 K9 Q# c3 a# t) mthe 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.
6 I$ E4 G9 y+ g- 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:
! l7 e. J$ B3 F2 G, d" U- C      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
8 v9 _- k# u1 ^( y/ `( ~Change it to:
      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”


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php测试无效
asp/aspx测试成功：
7 J1 x& Y0 j" W3 I. n- W: {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
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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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1 m& Y7 N& |* S; _如图，webshell为：http://localhost/userfiles/file/asd(1).asp
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