最新FCKEditor ASP上传绕过漏洞

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exploiut-db：
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. @% W, O' g4 H$ {) A* y$ u4 ^( l/ LFCKEditor ASP Version 2.6.8 File Upload Protection Bypass
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- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
- L. P' Y" f* z8 R, i4 p  S( P- Credit goes to: Mostafa Azizi, Soroush Dalili
- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
- Description:
. E/ g- u. m$ s: `  b. XThere 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
the protection and upload a file with any extension.
0 L& Y. S: S7 w+ z+ \9 \8 \- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
7 @7 L6 I  k# H- Solution: Please check the provided reference or the vendor website.
) D7 M( F) ]# T# @6 e. W- r- PoC:http://www.youtube.com/v/1VpxlJ5 ... ;rel=0&vq=hd720
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8 a# R$ j7 j" G; iNote: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
In “config.asp”, wherever you have:
      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
Change it to:
! ^7 g8 @  w4 u9 L  j      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”
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. m! ]: |. ]; ?" q: P' vphp测试无效
asp/aspx测试成功：
来到/FCKeditor/editor/filemanager/connectors/test.html
因为结合了之前二次上传的漏洞，所以先上传任意内容的文件：asd.asp.txt
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/ h- }+ L+ b( @% g( V4 Qburpsuite上传包并修改，repeater
: [3 _( k* B: A7 Q# v" E+ ^名字改为asd.asp%00txt    然后把%00专为URL编码上传后得到asd(1).asp
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, C- Z$ ^$ }: v- x1 z+ N( `如图，webshell为：http://localhost/userfiles/file/asd(1).asp

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