最新FCKEditor ASP上传绕过漏洞

admin

exploiut-db：
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& h2 ]! P& q% `FCKEditor ASP Version 2.6.8 File Upload Protection Bypass

( K" a  e6 C1 Z. L  O" Z& \; N# {- 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.
- PoC:http://www.youtube.com/v/1VpxlJ5 ... ;rel=0&vq=hd720
"
9 N: t! {, _' W7 pNote: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
In “config.asp”, wherever you have:
/ j+ i7 s& ?9 o3 W      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
6 I0 U/ k+ U3 t( B4 S7 EChange it to:
6 `! q1 [$ b' {; W- y5 B      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”



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php测试无效
asp/aspx测试成功：
$ D5 |! d+ j0 ]! o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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: ^+ V1 h/ h% C- Iburpsuite上传包并修改，repeater
: H5 _1 a# a5 I& S1 Y  \2 R9 l8 ]& m8 _0 j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
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