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标题: 最新FCKEditor ASP上传绕过漏洞 [打印本页]

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作者: admin    时间: 2012-12-10 10:18
标题: 最新FCKEditor ASP上传绕过漏洞
exploiut-db：
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1 @+ d) p  x! p% `# p! uFCKEditor 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/
2 o  L# d6 h8 c4 D6 i: W6 m, I- Description:
: T3 H# y! P# L3 D) h; s$ }, PThere is no validation on the extensions when FCKEditor 2.6.8 ASP version is
' E, y, V" F7 }$ Ldealing with the duplicate files. As a result, it is possible to bypass
the protection and upload a file with any extension.
( ]$ n4 }" {5 |6 w- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
$ H- X" a! w# r- ^; H- Solution: Please check the provided reference or the vendor website.
+ L; U( J; ?" }0 o- 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:
' O+ o: `# w* ]: ~$ \0 z, VIn “config.asp”, wherever you have:
      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
Change it to:
5 G: O9 d; ~  G; j0 W4 }* ^      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”
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php测试无效
$ W7 r4 V0 A: ~2 iasp/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

; R% i3 `9 \1 ]7 Iburpsuite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
, o1 r% @! p& u5 j% s
: A0 V4 o6 O9 C! |9 e如图，webshell为：http://localhost/userfiles/file/asd(1).asp
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