最新FCKEditor ASP上传绕过漏洞

admin

exploiut-db：

FCKEditor ASP Version 2.6.8 File Upload Protection Bypass
+ |3 Z% H% \. a% B# K
- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
- Credit goes to: Mostafa Azizi, Soroush Dalili
  Y- Y; Y. I/ t2 {% D; ]& `4 P+ o8 v- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
+ V' i+ P5 i, g& x* X- Description:
2 A2 \+ }4 K& R, F' F2 i9 K7 @. I7 f6 jThere is no validation on the extensions when FCKEditor 2.6.8 ASP version is
) k5 o; \' L2 K+ F) m! odealing with the duplicate files. As a result, it is possible to bypass
# P6 i* T: |% [the protection and upload a file with any extension.
. ^  p4 [) o, G1 m" N& J/ C0 a- 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
"
/ W0 @2 }9 K3 l5 l9 E! v% tNote: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
In “config.asp”, wherever you have:
5 H; A+ I7 y+ w, s      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
3 I8 R/ B8 d6 g( p9 y( h% E, hChange it to:
      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”


8 z# E" Z$ _5 L) A0 ?


php测试无效
asp/aspx测试成功：
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

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
4 L9 T0 U8 \* i+ x* p* F
如图，webshell为：http://localhost/userfiles/file/asd(1).asp

  Y+ b" D- P2 N+ T$ v2 e! e8 [