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
- 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/
3 J( g9 ]" ]( u9 P- Solution: Please check the provided reference or the vendor website.
( K( U4 J! R1 W  l) z- PoC:http://www.youtube.com/v/1VpxlJ5 ... ;rel=0&vq=hd720
"
Note: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
+ d4 I  Z1 R* x, |. T7 ]In “config.asp”, wherever you have:
" ?/ }! {- ]" V; [0 t7 K. t      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
Change it to:
# H/ n' w" g# V      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”


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php测试无效
$ f7 s  E7 }: L1 Kasp/aspx测试成功：
3 O3 ]9 ?4 u2 c) j3 W来到/FCKeditor/editor/filemanager/connectors/test.html
8 y+ q  l7 o1 d# [) n6 _6 @' i' H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

8 g2 \( ]+ G$ w# m7 V: t如图，webshell为：http://localhost/userfiles/file/asd(1).asp