最新FCKEditor ASP上传绕过漏洞

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exploiut-db：

2 {; i: C% K+ ?  g- w5 gFCKEditor ASP Version 2.6.8 File Upload Protection Bypass

0 y; Z2 p$ c$ R* P3 {- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
  P0 q% d# |' ~) j- 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
/ D: P* t( z9 Jdealing with the duplicate files. As a result, it is possible to bypass
the protection and upload a file with any extension.
& J6 o: a2 u% O- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
- Solution: Please check the provided reference or the vendor website.
; U5 j1 W. ~/ Q3 T3 U8 C- 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:
7 y/ T$ Z. ~! z3 y" n      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
; d8 X3 C0 C" s6 n& U2 I$ lChange it to:
1 b9 l; B5 k- E2 J      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”

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+ e& Y, U5 n6 {/ O" S6 ^9 ephp测试无效
6 A& E# k0 E: n8 C* g! A; ]4 Sasp/aspx测试成功：
2 l6 N5 l: k* r) l8 H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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, @5 U  Y$ z, X% Nburpsuite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

# P! l& N  n$ t" B" J5 f$ F如图，webshell为：http://localhost/userfiles/file/asd(1).asp

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