最新FCKEditor ASP上传绕过漏洞

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exploiut-db：

0 x! w3 Y1 V. E$ U3 _, T( F/ G+ ?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
- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
- Description:
There 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.
- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
- Solution: Please check the provided reference or the vendor website.
- K- ?0 z6 w  [3 q- 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 j4 v+ x& R7 f; G$ p+ {3 N      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
Change it to:
+ l% W/ ^' C  F( Q" m( y      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”
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, L0 P6 \9 ?- K) X( G7 _php测试无效
asp/aspx测试成功：
来到/FCKeditor/editor/filemanager/connectors/test.html
% G  o* D: h8 B2 `5 x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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- g% ?  [+ R3 O( Aburpsuite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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2 L3 \4 e7 A6 i3 a2 e+ m, L如图，webshell为：http://localhost/userfiles/file/asd(1).asp
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