最新FCKEditor ASP上传绕过漏洞

admin

exploiut-db：
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FCKEditor ASP Version 2.6.8 File Upload Protection Bypass
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- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
- Credit goes to: Mostafa Azizi, Soroush Dalili
$ I4 n) W8 U- o5 x2 w' h  C- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
  k$ v: @1 i0 V* L9 U5 ?4 \/ r- 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
/ x# ]& D, Z) M& n% ?the protection and upload a file with any extension.
! B, |: ^0 s& h8 h6 Y- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
- 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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8 l& o. m) X5 W, I; n& X& FNote: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
In “config.asp”, wherever you have:
8 b$ R) w7 a7 O: [/ c! k      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
5 v" M* Q/ m  tChange it to:
: O, b/ l. o$ m1 Z3 e$ ~      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”





php测试无效
asp/aspx测试成功：
来到/FCKeditor/editor/filemanager/connectors/test.html
; C' I7 a  u6 g, y0 S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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6 b# k/ C( z5 i9 ]# Gburpsuite上传包并修改，repeater
& d& d/ C: a: F# ]' u0 C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